UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-21348 Name of Fund: BlackRock Muni Intermediate Duration Fund, Inc. Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer, BlackRock Muni Intermediate Duration Fund, Inc., 800 Scudders Mill Road, Plainsboro, NJ, 08536. Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011 Registrant's telephone number, including area code: (800) 882-0052 Date of fiscal year end: 05/31/07 Date of reporting period: 06/01/06 - 05/31/07 Item 1 - Report to Stockholders ALTERNATIVES BLACKROCK SOLUTIONS EQUITIES FIXED INCOME LIQUIDITY REAL ESTATE Annual Reports MAY 31, 2007 BlackRock Muni Intermediate Duration Fund, Inc. BlackRock Muni New York Intermediate Duration Fund, Inc. (BLACKROCK logo) NOT FDIC INSURED MAY LOSE VALUE NO BANK GUARANTEE These reports, including the financial information herein, are transmitted to shareholders of BlackRock Muni Intermediate Duration Fund, Inc. and BlackRock Muni New York Intermediate Duration Fund, Inc. for their information. This is not a prospectus. The Funds have leveraged their Common Stock and intend to remain leveraged by issuing Preferred Stock to provide the Common Stock shareholders with potentially higher rates of return. Leverage creates risks for Common Stock shareholders, including the likelihood of greater volatility of net asset value and market price of shares of the Common Stock, and the risk that fluctuations in the short-term dividend rates of the Preferred Stock may affect the yield to Common Stock shareholders. Past performance results shown in these reports should not be considered a representation of future performance. Statements and other information herein are as dated and are subject to change. A description of the policies and procedures that the Funds use to determine how to vote proxies relating to portfolio securities is available (1) without charge, upon request, by calling toll-free 1-800-441-7762; (2) at www.blackrock.com; and (3) on the Securities and Exchange Commission's Web site at http://www.sec.gov. Information about how the Funds voted proxies relating to securities held in the Funds' portfolios during the most recent 12-month period ended June 30 is available (1) at www.blackrock.com; and (2) on the Securities and Exchange Commission's Web site at http://www.sec.gov. BlackRock Muni Intermediate Duration Fund, Inc. BlackRock Muni New York Intermediate Duration Fund, Inc. P.O. Box 9011 Princeton, NJ 08543-9011 (GO PAPERLESS... logo) It's Fast, Convenient, & Timely! BlackRock Muni Intermediate Duration Fund, Inc. BlackRock Muni New York Intermediate Duration Fund, Inc. Important Tax Information All of the net investment income distributions paid by BlackRock Muni Intermediate Duration Fund, Inc. and BlackRock Muni New York Intermediate Duration Fund, Inc. during the taxable year ended May 31, 2007 qualify as tax-exempt interest dividends for Federal income tax purposes. Additionally, the following summarizes the taxable per share distributions paid by BlackRock Muni Intermediate Duration Fund, Inc. Long-Term Payable Date Ordinary Income Capital Gains Common Shareholders 12/28/2006 $ .082059 $ .036923 Preferred Shareholders Series M7 10/31/2006 $17.25 $ 7.75 11/07/2006 $16.78 $ 7.55 11/14/2006 $16.94 $ 7.63 11/21/2006 $17.80 $ 8.02 11/28/2006 $ 7.15 $ 3.21 Series T7 11/08/2006 $17.80 $ 8.02 11/15/2006 $17.29 $ 7.78 11/22/2006 $17.80 $ 8.02 11/29/2006 $18.08 $ 8.11 12/06/2006 $ 6.98 $ 3.15 Series W7 11/09/2006 $17.80 $ 8.02 11/16/2006 $17.25 $ 7.75 11/24/2006 $18.89 $ 8.49 11/30/2006 $15.60 $ 7.03 12/07/2006 $ 7.96 $ 3.58 Series TH7 11/10/2006 $17.91 $ 8.06 11/17/2006 $18.06 $ 8.12 11/24/2006 $18.42 $ 8.29 12/01/2006 $18.37 $ 8.26 12/08/2006 $ 4.83 $ 2.19 Series F7 11/13/2006 $16.78 $ 7.55 11/20/2006 $17.69 $ 7.97 11/27/2006 $16.78 $ 7.55 12/04/2006 $17.75 $ 7.98 12/11/2006 $ 8.86 $ 3.99 Series TH28 11/24/2006 $73.66 $33.14 12/22/2006 $ 8.58 $ 3.87 ANNUAL REPORTS MAY 31, 2007 A Letter to Shareholders Dear Shareholder The 12 months from May 2006 to May 2007 took global equities on an extraordinary ride. A sharp correction at the start, the first in almost four years, gave way to strength in the latter half of 2006 and early 2007. This rally was interrupted by another set-back at the end of February, before markets resumed their upward march through May 31. Ultimately, the tailwinds of a generally favorable global economic backdrop, tame inflation, relatively low interest rates, still positive earnings growth and attractive valuations prevailed over the headwinds of a weakening U.S. economy, slowing housing market, escalating geopolitical concerns and high energy prices. In fact, both the Dow Jones Industrial Average and the Standard & Poor's 500 Index touched new record highs following the most recent correction. Mixed economic signals led to volatile behavior in fixed income markets as well. However, from the beginning of 2007 through May 31, short-term bond yields generally fell while longer-term yields increased. This resulted in some re-steepening of the yield curve, which had been flat to inverted throughout 2006. On a year-over-year basis, yields on 30-year Treasury bonds fell 20 basis points (.20%) and 10-year yields fell 22 basis points, while bond prices correspondingly rose. Meanwhile, the Federal Reserve Board (the Fed) has left the federal funds rate at 5.25% since first pausing in August 2006. While first-quarter gross domestic product growth of 0.6% represented the slowest rate of expansion since 2002, the Fed reiterated its view that inflation, not a slowing economy, remains its primary concern. Many observers interpreted the Fed's reaction to mean that the economy has hit its low and is bound for renewed strength, therefore reducing the likelihood of an interest rate cut in the near future. Against this backdrop, most major market indexes posted positive returns for the annual and semi-annual reporting periods ended May 31, 2007, with equities exhibiting particular strength: Total Returns as of May 31, 2007 6-month 12-month U.S. equities (Standard & Poor's 500 Index) +10.29% +22.79% Small cap U.S. equities (Russell 2000 Index) + 8.39 +18.92 International equities (MSCI Europe, Australasia, Far East Index) +14.08 +26.84 Fixed income (Lehman Brothers Aggregate Bond Index) + 0.69 + 6.66 Tax-exempt fixed income (Lehman Brothers Municipal Bond Index) + 0.30 + 4.84 High yield bonds (Lehman Brothers U.S. Corporate High Yield 2% Issuer Cap Index) + 6.02 +12.64 We expect market volatility to linger throughout the remainder of 2007. As you navigate the uncertainties, we encourage you to review your investment goals with your financial professional and to make portfolio changes, as needed. For more insight, we invite you to view "What's Ahead in 2007: An Investment Perspective" and "Are You Prepared for Volatility?" at www.blackrock.com/funds. We thank you for entrusting BlackRock with your investment assets, and we look forward to continuing to serve you in the months and years ahead. Sincerely, (Robert C. Doll, Jr.) Robert C. Doll, Jr. Fund President and Director THIS PAGE NOT PART OF YOUR FUND REPORT ANNUAL REPORTS MAY 31, 2007 A Discussion With Your Funds' Portfolio Managers Given limited trading opportunities, Fund performance was driven largely by a cautious balance of yield and capital appreciation potential. Describe the recent market environment relative to municipal bonds. Over the past 12 months, long-term bond yields generally moved lower as bond prices, which move opposite of yields, increased. The long-term tax-exempt bond market's solid technical position allowed it to outperform the taxable U.S. Treasury market during the period. Bond prices began to improve (and yields fall) in late June 2006 as economic growth weakened. The improvement accelerated in response to the Federal Reserve Board's (the Fed's) decision in August to keep its target interest rate on hold at 5.25% after 17 consecutive interest rate hikes since mid-2004. The bond price rally continued in the fall amid moderating oil prices and slower gross domestic product (GDP) growth. By the end of November 2006, 30-year U.S. Treasury bond yields had fallen to 4.56%. More recently, strong U.S. equity markets, continued moderate employment growth and mounting investor conviction that the Fed would keep interest rates steady for the remainder of the year combined to push bond prices lower, while yields correspondingly rose. Still, over the full 12 months, 30-year U.S. Treasury bond yields fell 20 basis points (.20%) to 5.01%, and 10-year Treasury yields declined 22 basis points to 4.90%. The long-term tax-exempt bond market outperformed U.S. Treasury issues over the 12 months as investor demand outstripped a resurgent new-issue calendar. As measured by Municipal Market Data, yields on 30-year, AAA-rated issues declined 28 basis points to 4.25%. Meanwhile, yields on intermediate-maturity bonds fell less than those with longer maturities, as the Fed's string of interest rate hikes in 2005 and 2006, coupled with stronger investor demand for longer- maturity issues, resulted in a flattening of the municipal yield curve. Yields on AAA-rated 10-year municipal issues declined 11 basis points to 3.91%. Notably, the municipal curve remains steep relative to the Treasury curve. Investor demand for municipal product continued to strengthen throughout the reporting period. Statistics from the Investment Company Institute indicate that long-term municipal bond funds received more than $10.1 billion in net new cash flows during the first four months of 2007. This represented a 71% increase relative to the first four months of 2006. Weekly fund flows, as reported by AMG Data Services, also have risen. Weekly inflows during the three months ended May 2007 averaged over $520 million, up from a weekly average of $400 million in fourth quarter 2006 and well above the $233 million weekly average of last June. Recent retail investor demand has been bolstered by strong seasonal cash flows. It is estimated that investors will receive more than $42 billion this June from coupon income and the proceeds from bond maturities and early redemptions. Another $35 billion in such proceeds is expected to be received in July. As investor demand has strengthened, so has municipal bond supply. Some $423 billion in new long-term municipal bonds was issued during the 12-month reporting period, a nearly 12% increase compared to the same 12 months a year ago. In the latter half of the reporting period, more than $230 billion in new tax-exempt bonds was issued, an increase of over 35% compared to the same six months a year ago. Over $173 billion in long-term municipal bonds has been underwritten so far this year. This puts 2007 annual issuance more than 5% ahead of 2005's record pace. Issuers have continued to take advantage of historically low interest rates to refinance outstanding debt. So far this year, there have been more than 10 underwritings exceeding $1 billion in size, leading many analysts to adjust their estimates of 2007 annual bond issuance to near or above $400 billion. These "mega-deals" have continued to be relatively easily absorbed by tax-exempt market participants, especially non-traditional and foreign buyers, both of which find the liquidity these deals afford particularly attractive. Looking ahead, the increase in new bond supply seen this year appears unlikely to abate significantly. As such, investor demand will be critical in maintaining the tax-exempt market's strong technical position. Having said that, we expect that both traditional and non-traditional investors will continue to be drawn to the municipal market given the relative stability of tax-exempt yield ratios in recent months and the steepness of the municipal yield curve compared to the taxable curve. We believe this should help to support the market's performance in the months ahead. ANNUAL REPORTS MAY 31, 2007 BlackRock Muni Intermediate Duration Fund, Inc. How did the Fund perform during the fiscal year? For the 12-month period ended May 31, 2007, the Common Stock of BlackRock Muni Intermediate Duration Fund, Inc. had net annualized yields of 4.91% and 5.00%, based on a year-end per share net asset value of $15.10 and a per share market price of $14.85, respectively, and $.742 per share income dividends. Over the same period, the total investment return on the Fund's Common Stock was +6.14%, based on a change in per share net asset value from $15.07 to $15.10, and assuming reinvestment of all distributions. The Fund's total return, based on net asset value, exceeded the +5.25% average return of the Lipper Intermediate Municipal Debt Funds category for the 12-month period. (Funds in this Lipper category invest in municipal debt issues with dollar-weighted average maturities of 5 years to 10 years.) The Fund maintains an above-average coupon structure, which permits it to provide a higher yield relative to the Lipper group in a stable interest rate environment. During periods of rising interest rates, its relatively lower interest rate sensitivity tempers price volatility, and this contributed positively to performance during the period. The Fund's average coupon at period-end was approximately 5.70%, compared to a market average of roughly 4.40% (as measured by the Municipal Market Data 10-year scale). We believe this coupon structure is most effective given the portfolio's below-average duration stance, and helps the Fund to maintain an attractive income distribution rate. For the six-month period ended May 31, 2007, the total investment return on the Fund's Common Stock was +.14%, based on a change in per share net asset value from $15.57 to $15.10, and assuming reinvestment of all distributions. For the same period, the average return of the Lipper Intermediate Municipal Debt Funds category was -.35%. For a description of the Fund's total investment return based on a change in the per share market value of the Fund's Common Stock (as measured by the trading price of the Fund's shares on the New York Stock Exchange), and assuming reinvestment of distributions, please refer to the Financial Highlights section of this report. As a closed-end fund, the Fund's shares may trade in the secondary market at a premium or discount to the Fund's net asset value. As a result, total investment returns based on changes in the market value of the Fund's Common Stock may vary significantly from total investment returns based on changes in the Fund's net asset value. What changes were made to the portfolio during the period? We did not make any notable structural changes to the portfolio over the past 12 months, as we are comfortable with the Fund's current positioning and performance. As interest rates started to rise more significantly toward the end of the period, we began looking slightly further out on the municipal yield curve for investment opportunities. We believe the 15-year to 20-year segment of the curve offers the best yield value, while allowing us to remain within the Fund's duration parameters. For the six months ended May 31, 2007, the average yields for the Fund's Auction Market Preferred Stock were 3.61% for Series M7; 3.66% for Series T7; 3.74% for Series W7; 3.75% for Series TH7; 3.72% for Series F7; and 3.66% for Series TH28. The Fed kept its target interest rate on hold at 5.25% since last summer and, as a result, the Fund's borrowing costs stabilized and even moved slightly lower. Although flat by historical standards, the municipal yield curve remained positively sloped (long-term yields were higher than short-term yields) and continued to generate an income benefit to the Common Stock shareholder from the leveraging of Preferred Stock. As always, should the spread between short-term and long-term interest rates narrow, the benefits of leverage will decline and, as a result, reduce the yield on the Fund's Common Stock. (For a more complete explanation of the benefits and risks of leveraging, see page 8 of this report to shareholders.) How would you characterize the Fund's position at the close of the period? We maintain the Fund's short duration relative to the Lipper category average. This aided performance as interest rates moved higher late in the period. We will need to be aware of changes in duration characteristics of individual holdings as interest rates rise. We intend to maintain 80% of the Fund's net assets in securities with durations between three years and 10 years. Because durations change with the absolute level of interest rates, we will be mindful to ensure that any new purchases enable the Fund to maintain its above-average coupon structure, consistent with our investment strategy. ANNUAL REPORTS MAY 31, 2007 A Discussion With Your Funds' Portfolio Managers (concluded) Generally speaking, the Fund has a market weighting in higher-credit-quality issues. We intend to move the Fund to an overweight position in high-quality securities going forward, at least until the yield advantage of lower-rated credits increases. Currently, credit spreads are very tight and there is little additional yield to be gained by investing in lower-quality issues. Finally, we will concentrate our new purchases in the 15-year to 20-year maturity area of the municipal yield curve, the steepest part of the curve, in an effort to enhance the Fund's current yield. BlackRock Muni New York Intermediate Duration Fund, Inc. Describe conditions in the State of New York. The State of New York ended the period rated Aa3, AA and AA- by Moody's, Standard & Poor's and Fitch, respectively, all with stable trends. New York ranks fifth in both debt per capita and debt as a percent of personal income, according to Moody's. It also ranked fifth in per capita income in 2006 (preliminary), according to the U.S. Department of Commerce. New York's April 2007 unemployment rate was 4.1%, which was below the national rate of 4.5%. The state's fiscal year 2006 operations resulted in a $2 billion surplus and an ending $900 million "rainy day" reserve. The November 2006 financial plan update forecasts a $1.1 billion general fund surplus in fiscal year 2007, due to higher-than-expected receipts and spending reductions. On April 1, 2007, New York lawmakers passed a $120.9 billion budget for fiscal year 2008 that increases spending by 8.7%, the largest annual increase since 2000. Despite $1 billion in Medicaid cuts, property-tax rebates and increased school aid pushed spending higher. Key credit issues remain cost pressures from Medicaid, pensions and school aid, as well as the sustainability of growing personal income tax receipts. How did the Fund perform during the fiscal year? For the 12-month period ended May 31, 2007, the Common Stock of BlackRock Muni New York Intermediate Duration Fund, Inc. had net annualized yields of 4.30% and 4.60%, based on a year-end per share net asset value of $14.91 and a per share market price of $13.93, respectively, and $.641 per share income dividends. Over the same period, the total investment return on the Fund's Common Stock was +6.57%, based on a change in per share net asset value from $14.66 to $14.91, and assuming reinvestment of all distributions. The Fund's total return, based on net asset value, exceeded the +5.25% average return of the Lipper Intermediate Municipal Debt Funds category for the 12-month period. (Funds in this Lipper category invest in municipal debt issues with dollar-weighted average maturities of 5 years to 10 years.) When evaluating relative performance, it is important to note that while the Lipper category accounts for the Fund's intermediate duration profile, there will be some variance in total returns and yields, as the category includes national funds, in addition to funds focused on single states other than New York. Total return outperformance resulted from a combination of the Fund's slightly longer duration relative to the Lipper group and our concentrated effort to enhance distributable income for shareholders. Additionally, the Fund benefited from select purchases of higher-yielding, lower-rated investment grade issues as lower-quality credits continued to top the high-grade market throughout the reporting period, in addition to generating incremental yield for the portfolio. Detracting from both the Fund's total return performance and income was a below- average distribution rate. In part, this is attributable to the low-interest- rate environment that existed when the Fund was established. While we are continuously looking for opportunities to book bonds at higher yields, a soft market has presented few prospects, leaving the Fund with more lower-yielding bonds than some of its more-seasoned peers. For the six-month period ended May 31, 2007, the total investment return on the Fund's Common Stock was -.18%, based on a change in per share net asset value from $15.28 to $14.91, and assuming reinvestment of all distributions. For the same period, the average return of the Lipper Intermediate Municipal Debt Funds category was -.35%. For a description of the Fund's total investment return based on a change in the per share market value of the Fund's Common Stock (as measured by the trading price of the Fund's shares on the New York Stock Exchange), and assuming reinvestment of distributions, please refer to the Financial Highlights section of this report. As a closed-end fund, the Fund's shares may trade in the secondary market at a premium or discount to the Fund's net asset value. As a result, total investment returns based on changes in the market value of the Fund's Common Stock may vary significantly from total investment returns based on changes in the Fund's net asset value. ANNUAL REPORTS MAY 31, 2007 What changes were made to the portfolio during the period? Trading activity was limited throughout the reporting period. We focused largely on improving the Fund's distribution rate and, in many cases, opted to retain the Fund's older bonds, which have higher yields than those currently available in the new-issue market. New issuance of New York municipal bonds was down nearly 16% versus a year ago, despite a spate of refunding activity at the end of 2006. Broadly speaking, few issues met our desired investment characteristics as new supply in the municipal market has been dominated by debt refinancing (wherein issuers retire existing bonds by using proceeds from new issuance) and other non-traditional structured products. Although the macro environment prohibited any major restructuring, we did begin to trim the portfolio's short-term holdings, specifically shorter-dated prerefunded bonds and high-coupon, short-call bonds (generally those having a call date within three years or less). These bonds are priced with a premium and, as the call date approaches, their value depreciates at an accelerating rate and they tend to underperform the broader market. While this move temporarily hurts distributable income, we believe it is a worthwhile trade-off to protect the future total return potential of the Fund. We reinvested the proceeds primarily on the long end of the municipal yield curve, where we found attractive opportunities to trade the portfolio and to generate higher levels of income for the Fund. Key purchases during the year included: insured Yankees and Mets (Queens Stadium) bonds, high-quality holdings that we believe have long-term capital appreciation potential; housing bonds, which offer the benefits of above-market yield and lower-than- average volatility; education bonds, mainly those of colleges and universities, where financial profiles have been steadily improving; and Puerto Rico bonds, which - despite their recent underperformance - offer incremental yield and enhance portfolio liquidity. In addition, we modestly reduced our insured holdings in favor of higher-yielding, lower-quality credits (primarily issues rated BBB and BBB+). For the six months ended May 31, 2007, the average yield for the Fund's Auction Market Preferred Stock was 3.48%. There was no material change in the Fund's borrowing costs over the course of the period, as the Fed kept the federal funds target rate steady at 5.25% since first pausing last August. Although flat by historical standards, the tax-exempt yield curve maintained a positive slope throughout the period (particularly compared to the U.S. Treasury yield curve), allowing us to borrow at a lower rate than where we invest. This continued to generate an income benefit to the holders of Common Stock from the leveraging of Preferred Stock. As always, should the spread between short-term and long-term interest rates narrow, the benefits of leverage will decline and, accordingly, the yield on the Fund's Common Stock will be reduced. (For a more complete explanation of the benefits and risks of leveraging, see page 8 of this report to shareholders.) How would you characterize the Fund's position at the close of the period? We maintained a fully invested portfolio throughout the period and ended the year with a slightly longer duration than that of our comparable Lipper group. Given a quiet Fed and few new-issue prospects, we are focusing on identifying compelling relative value trading opportunities, while continuing our efforts to add yield to the portfolio. We are encouraged by the recent back-up (that is, increase) in interest rates and the pick-up in new-issue supply, and will continue to evaluate prospects for portfolio diversification and income accrual. We also will seek additional opportunities to sell shorter-dated bonds and reinvest those proceeds in attractive, longer-dated bonds. Looking ahead, we believe the municipal bond market is well positioned for outperformance given a high level of scheduled municipal bond payouts in the coming months. Approximately $70 billion in municipal coupon and principal payments are due to investors in June and July - money that tends to be reinvested in the municipal market. Moreover, the recent back-up in interest rates has attracted the interest of retail buyers (traditional and majority purchasers of municipal bonds), which we believe should translate into sustained demand for municipal securities. Walter C. O'Connor, CFA Portfolio Manager BlackRock Muni Intermediate Duration Fund, Inc. Timothy T. Browse, CFA Portfolio Manager BlackRock Muni New York Intermediate Duration Fund, Inc. June 26, 2007 ANNUAL REPORTS MAY 31, 2007 The Benefits and Risks of Leveraging The Funds utilize leveraging to seek to enhance the yields and net asset values of their Common Stock. However, these objectives cannot be achieved in all interest rate environments. To leverage, each Fund issues Preferred Stock, which pays dividends at prevailing short-term interest rates, and invests the proceeds in long-term municipal bonds. The interest earned on these investments, net of dividends to Preferred Stock, is paid to Common Stock shareholders in the form of dividends, and the value of these portfolio holdings is reflected in the per share net asset value of each Fund's Common Stock. However, in order to benefit Common Stock shareholders, the yield curve must be positively sloped; that is, short-term interest rates must be lower than long-term interest rates. At the same time, a period of generally declining interest rates will benefit Common Stock shareholders. If either of these conditions change, then the risks of leveraging will begin to outweigh the benefits. To illustrate these concepts, assume a fund's Common Stock capitalization of $100 million and the issuance of Preferred Stock for an additional $50 million, creating a total value of $150 million available for investment in long-term municipal bonds. If prevailing short-term interest rates are approximately 3% and long-term interest rates are approximately 6%, the yield curve has a strongly positive slope. The fund pays dividends on the $50 million of Preferred Stock based on the lower short-term interest rates. At the same time, the fund's total portfolio of $150 million earns the income based on long-term interest rates. In this case, the dividends paid to Preferred Stock shareholders are significantly lower than the income earned on the fund's long-term investments, and therefore the Common Stock shareholders are the beneficiaries of the incremental yield. However, if short-term interest rates rise, narrowing the differential between short-term and long-term interest rates, the incremental yield pickup on the Common Stock will be reduced or eliminated completely. At the same time, the market value of the fund's Common Stock (that is, its price as listed on the New York Stock Exchange) may, as a result, decline. Furthermore, if long-term interest rates rise, the Common Stock's net asset value will reflect the full decline in the price of the portfolio's investments, since the value of the fund's Preferred Stock does not fluctuate. In addition to the decline in net asset value, the market value of the fund's Common Stock may also decline. As of May 31, 2007, BlackRock Muni Intermediate Duration Fund, Inc. and BlackRock Muni New York Intermediate Duration Fund, Inc. had leverage amounts, due to Auction Market Preferred Stock, of 35.79% and 33.08% of total net assets, respectively, before the deduction of Preferred Stock. As a part of its investment strategy, the Funds may invest in certain securities whose potential income return is inversely related to changes in a floating interest rate ("inverse floaters"). In general, income on inverse floaters will decrease when short-term interest rates increase and increase when short-term interest rates decrease. Investments in inverse floaters may be characterized as derivative securities and may subject the Funds to the risks of reduced or eliminated interest payments and losses of invested principal. In addition, inverse floaters have the effect of providing investment leverage and, as a result, the market value of such securities will generally be more volatile than that of fixed-rate, tax-exempt securities. To the extent the Funds invest in inverse floaters, the market value of each Fund's portfolio and the net asset value of each Fund's shares may also be more volatile than if the Funds did not invest in such securities. (See Note 1(c) to Financial Statements for details of municipal bonds held in trust.) Quality Profiles as of May 31, 2007 BlackRock Muni Intermediate Percent of Duration Fund, Inc. Total By S&P/Moody's Rating Investments AAA/Aaa 46.0% AA/Aa 4.3 A/A 12.8 BBB/Baa 18.5 BB/Ba 1.8 B/B 1.2 CCC/Caa 1.7 NR (Not Rated) 12.5 Other* 1.2 * Includes portfolio holdings in variable rate demand notes. BlackRock Muni New York Percent of Intermediate Duration Fund, Inc. Total By S&P/Moody's Rating Investments AAA/Aaa 27.5% AA/Aa 22.2 A/A 12.7 BBB/Baa 21.9 BB/Ba 5.1 CCC/Caa 2.8 NR (Not Rated) 6.7 Other* 1.1 * Includes portfolio holdings in variable rate demand notes. ANNUAL REPORTS MAY 31, 2007 Schedule of Investments As of May 31, 2007 BlackRock Muni Intermediate Duration Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value Alabama--4.2% Jefferson County, Alabama, Limited Obligation School Warrants, Series A: $ 5,500 5.50% due 1/01/2021 $ 5,911 6,500 5.25% due 1/01/2023 6,854 6,600 Tuscaloosa, Alabama, Special Care Facilities Financing Authority, Residential Care Facility Revenue Bonds (Capstone Village, Inc. Project), Series A, 5.625% due 8/01/2025 6,623 4,700 University of Alabama, General Revenue Refunding Bonds, VRDN, Series C, 3.86% due 7/01/2034 (f)(h) 4,700 Arizona--2.7% 2,860 Coconino County, Arizona, Pollution Control Corporation Revenue Bonds (Arizona Public Service Co.--Navajo Project), VRDN, AMT, Series A, 3.93% due 10/01/2029 (h) 2,860 2,820 Maricopa County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project 1), Series A, 6.625% due 7/01/2020 2,866 3,000 Navajo County, Arizona, IDA, IDR (Stone Container Corporation Project), AMT, 7.20% due 6/01/2027 3,065 Pima County, Arizona, IDA, Education Revenue Bonds (Arizona Charter Schools Project): 995 Series C, 6.70% due 7/01/2021 1,064 820 Series K, 6.375% due 7/01/2013 (g) 922 930 Series K, 6.375% due 7/01/2031 1,000 3,630 Vistancia Community Facilities District, Arizona, GO, 5% due 7/15/2014 3,811 Arkansas--0.7% 3,755 Conway, Arkansas, Public Facilities Board, Capital Improvement Revenue Refunding Bonds (Hendrix College Projects), Series B, 5% due 10/01/2026 3,843 California--23.6% 8,000 Antelope Valley, California, Health Care District Revenue Bonds, VRDN, Series A, 5.25% due 9/01/2017 (h) 8,218 5,000 California State Department of Water Resources, Power Supply Revenue Bonds, Series A, 5.375% due 5/01/2012 (g) 5,394 California State, GO: 15,575 5.50% due 4/01/2014 (g) 17,086 15 5.50% due 4/01/2028 16 5,000 California State, GO, Refunding, 5.25% due 2/01/2027 (f)(i) 5,265 10,000 California State Public Works Board, Lease Revenue Bonds (Department of Corrections), Series C, 5.50% due 6/01/2020 10,839 2,500 California Statewide Communities Development Authority, Health Facility Revenue Bonds (Memorial Health Services), Series A, 6% due 10/01/2023 2,704 Face Amount Municipal Bonds Value California (concluded) $ 2,400 Elk Grove, California, Poppy Ridge Community Facilities Number 3 Special Tax, Series 1, 6% due 9/01/2008 (g) $ 2,483 5,000 Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Refunding Bonds, Senior Series A-1, 5% due 6/01/2015 5,177 1,435 Los Angeles, California, Regional Airports Improvement Corporation, Facilities Lease Revenue Refunding Bonds (LAXFUEL Corporation--Los Angeles International Airport), AMT, 5.50% due 1/01/2032 (a) 1,497 30,000 Los Angeles, California, Unified School District, GO, Series A, 5% due 7/01/2013 (f)(g) 31,904 10,135 Peralta, California, Community College District, GO (Election of 2000), Series D, 5% due 8/01/2030 (e) 10,626 1,515 Rowland, California, Unified School District, GO (Election of 2000), Series B, 5.25% due 8/01/2027 (e) 1,601 Sacramento, California, Special Tax (North Natomas Community Facilities), Series 4-C: 585 5.60% due 9/01/2020 614 1,720 5.75% due 9/01/2022 1,817 500 5.90% due 9/01/2023 532 3,000 6% due 9/01/2028 3,193 2,295 San Francisco, California, City and County, GO (Branch Library Facilities Improvements), Series G, 5% due 6/15/2023 (f) 2,406 3,000 San Jose, California, Airport Revenue Bonds, Series A, 5.25% due 3/01/2017 (c) 3,136 3,100 San Jose, California, GO (Libraries, Parks and Public Safety Projects), 5% due 9/01/2030 (f) 3,225 9,030 Sequoia, California, Unified High School District, GO, Refunding, Series B, 5.50% due 7/01/2035 (e) 9,966 4,875 Tamalpais, California, Union High School District, GO (Election of 2001), 5% due 8/01/2028 (e) 5,071 2,610 Tustin, California, Unified School District, Senior Lien Special Tax Bonds (Community Facilities District Number 97-1), Series A, 5% due 9/01/2032 (e) 2,688 Colorado--2.6% 2,000 Denver, Colorado, City and County Airport Revenue Refunding Bonds, Series E, 5.25% due 11/15/2023 (f) 2,032 800 Elk Valley, Colorado, Public Improvement Revenue Bonds (Public Improvement Fee), Series A, 7.10% due 9/01/2014 850 2,250 Montrose, Colorado, Memorial Hospital, Revenue Bonds, 6.375% due 12/01/2023 2,492 7,500 Plaza Metropolitan District Number 1, Colorado, Tax Allocation Revenue Bonds (Public Improvement Fees), 7.50% due 12/01/2015 8,266 1,000 Southlands, Colorado, Medical District, GO (Metropolitan District # 1), 6.75% due 12/01/2016 1,100 Portfolio Abbreviations To simplify the listings of portfolio holdings in the Schedules of Investments, we have abbreviated the names of many of the securities according to the list at right. AMT Alternative Minimum Tax (subject to) COP Certificates of Participation EDA Economic Development Authority GO General Obligation Bonds HFA Housing Finance Agency IDA Industrial Development Authority IDB Industrial Development Board IDR Industrial Development Revenue Bonds M/F Multi-Family PCR Pollution Control Revenue Bonds PILOT Payment in Lieu of Taxes S/F Single-Family VRDN Variable Rate Demand Notes ANNUAL REPORTS MAY 31, 2007 Schedule of Investments (continued) BlackRock Muni Intermediate Duration Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value Connecticut--1.9% $ 1,160 Connecticut State Development Authority, Airport Facility Revenue Bonds (Learjet Inc. Project), AMT, 7.95% due 4/01/2026 $ 1,387 8,000 Connecticut State Development Authority, PCR, Refunding (Connecticut Light and Power Company), Series A, 5.85% due 9/01/2028 8,319 1,250 South Central Connecticut Regional Water Authority, Water System Revenue Refunding Bonds, Fifteenth, Series A, 5.125% due 8/01/2009 (c)(g) 1,297 Florida--6.3% 2,900 Harbor Bay, Florida, Community Development District, Capital Improvement Special Assessment Bonds, 6.75% due 5/01/2034 3,182 940 Heritage Isle at Viera Community Development District, Florida, Special Assessment Bonds, Series B, 5% due 11/01/2009 939 5,230 Hillsborough County, Florida, IDA, Hospital Revenue Bonds (Tampa General Hospital Project), 5.25% due 10/01/2041 5,369 2,100 Lee County, Florida, Hospital Board of Directors, Hospital Revenue Bonds (Memorial Health System), VRDN, Series A, 3.87% due 4/01/2025 (h) 2,100 5,500 Miami-Dade County, Florida, Aviation Revenue Refunding Bonds (Miami International Airport), AMT, 5.75% due 10/01/2019 (c) 5,906 Midtown Miami, Florida, Community Development District, Special Assessment Revenue Bonds: 3,500 Series A, 6% due 5/01/2024 3,749 2,000 Series B, 6.50% due 5/01/2037 2,191 3,670 Orange County, Florida, Health Facilities Authority, Health Care Revenue Refunding Bonds (Orlando Lutheran Towers), 5% due 7/01/2013 3,624 875 Orlando, Florida, Urban Community Development District, Capital Improvement Special Assessment Bonds, 6% due 5/01/2020 933 1,085 Portofino Shores, Florida, Community Development District, Special Assessment Bonds, Series A, 6.40% due 5/01/2034 1,160 2,390 South Lake County, Florida, Hospital District Revenue Bonds (South Lake Hospital Inc.), 6.625% due 10/01/2023 2,656 305 Sterling Hill, Florida, Community Development District, Capital Improvement Revenue Refunding Bonds, Series B, 5.50% due 11/01/2010 305 4,000 University of Florida Reasearch Foundation Inc., Capital Improvement Revenue Bonds, 5.125% due 9/01/2033 (a) 4,083 Georgia--2.9% 1,500 Atlanta, Georgia, Tax Allocation Bonds (Atlantic Station Project), 7.90% due 12/01/2024 1,652 Brunswick and Glynn County, Georgia, Development Authority, First Mortgage Revenue Bonds (Coastal Community Retirement Corporation Project), Series A: 5,395 7.125% due 1/01/2025 4,326 2,800 7.25% due 1/01/2035 2,243 4,500 Fulton County, Georgia, Residential Care Facilities, Revenue Refunding Bonds (Canterbury Court Project), Series A, 5.80% due 2/15/2018 4,557 Savannah, Georgia, EDA, First Mortgage Revenue Bonds (Marshes of Skidaway), Series A: 1,245 6.25% due 1/01/2012 1,267 2,245 6.85% due 1/01/2019 2,387 Face Amount Municipal Bonds Value Idaho--0.8% $ 4,000 Boise City, Idaho, COP, AMT, 5.50% due 9/01/2025 (c) $ 4,157 370 Idaho Housing and Finance Association, S/F Mortgage Revenue Bonds, AMT, Series F-2, 5.85% due 7/01/2015 (d)(k) 375 Illinois--3.5% 2,510 Chicago, Illinois, O'Hare International Airport Revenue Bonds, Third Lien, AMT, Series B-2, 6% due 1/01/2029 (j) 2,789 6,000 Hodgkins, Illinois, Environmental Improvement Revenue Bonds (Metro Biosolids Management LLC Project), AMT, 5.90% due 11/01/2017 6,179 6,930 Illinois, Development Finance Authority Revenue Bonds (Community Rehabilitation Providers Facilities), Series A, 6.625% due 7/01/2032 7,497 1,800 Illinois State Finance Authority Revenue Bonds (Landing At Plymouth Place Project), Series A, 6% due 5/15/2025 1,907 1,580 Village of Wheeling, Illinois, Revenue Bonds (North Milwaukee/Lake-Cook Tax Increment Financing (TIF) Redevelopment Project), 6% due 1/01/2025 1,602 Indiana--0.8% 4,300 Indiana Transportation Finance Authority, Highway Revenue Bonds, Series A, 5% due 6/01/2013 (e)(g) 4,546 Louisiana--2.2% 6,965 Louisiana Public Facilities Authority Revenue Bonds (University of New Orleans Research and Technology Foundation, Inc.--Student Housing Project), 5.25% due 3/01/2026 (f) 7,471 5,000 Port New Orleans, Louisiana, IDR, Refunding (Continental Grain Company Project), 6.50% due 1/01/2017 5,078 Maine--0.4% 1,965 Portland, Maine, Housing Development Corporation, Senior Living Revenue Bonds (Avesta Housing Development Corporation Project), Series A, 6% due 2/01/2034 2,066 Maryland--0.1% 500 Maryland State Industrial Development Financing Authority, Economic Development Revenue Bonds (Our Lady of Good Counsel School), Series A, 6% due 5/01/2035 535 Massachusetts--3.5% 4,560 Massachusetts Bay Transportation Authority, Sales Tax Revenue Refunding Bonds, Senior Series A, 5% due 7/01/2012 (g) 4,793 Massachusetts State Development Finance Agency, Resource Recovery Revenue Bonds (Ogden Haverhill Associates), AMT, Series B: 1,210 5.35% due 12/01/2015 1,238 2,000 5.50% due 12/01/2019 2,067 3,000 Massachusetts State Industrial Finance Agency, Resource Recovery Revenue Refunding Bonds (Ogden Haverhill Project), AMT, Series A, 5.30% due 12/01/2009 3,066 8,325 Massachusetts State School Building Authority, Dedicated Sales Tax Revenue Bonds, Series A, 5% due 8/15/2030 (e) 8,712 Michigan--1.3% 2,325 Macomb County, Michigan, Hospital Finance Authority, Hospital Revenue Bonds (Mount Clemens General Hospital), Series B, 5.875% due 11/15/2034 2,457 4,795 Michigan State Hospital Finance Authority, Revenue Refunding Bonds (Oakwood Obligated Group), Series A, 6% due 4/01/2022 5,183 ANNUAL REPORTS MAY 31, 2007 Schedule of Investments (continued) BlackRock Muni Intermediate Duration Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value Minnesota--2.6% $ 8,875 Minneapolis and Saint Paul, Minnesota, Housing Finance Board, S/F Mortgage Revenue Bonds (Mortgaged-Backed Securities Program--City Living), AMT, Series A-1, 5.25% due 12/01/2040 (l)(m) $ 9,193 Minneapolis and Saint Paul, Minnesota, Housing and Redevelopment Authority, Health Care System Revenue Bonds (Group Health Plan Inc. Project): 1,000 6% due 12/01/2019 1,077 2,545 6% due 12/01/2021 2,740 2,000 Minnesota State Municipal Power Agency, Electric Revenue Bonds, Series A, 5.25% due 10/01/2024 2,102 Mississippi--1.4% Mississippi Business Finance Corporation, Mississippi, PCR, Refunding (System Energy Resources Inc. Project): 5,000 5.875% due 4/01/2022 5,051 2,910 5.90% due 5/01/2022 2,939 Nevada--0.4% 2,245 Clark County, Nevada, Improvement District Number 142, Special Assessment Bonds, 6.375% due 8/01/2023 2,317 New Jersey--13.6% Garden State Preservation Trust of New Jersey, Open Space and Farmland Preservation Revenue Bonds, Series A (e): 3,635 5.80% due 11/01/2021 4,096 5,050 5.80% due 11/01/2023 5,690 New Jersey EDA, Cigarette Tax Revenue Bonds: 10,950 5.625% due 6/15/2018 11,259 9,810 5.75% due 6/15/2029 10,538 17,900 New Jersey EDA, Motor Vehicle Surcharge Revenue Bonds, Series A, 5.25% due 7/01/2033 (f) 19,029 5,540 New Jersey EDA, Special Facility Revenue Bonds (Continental Airlines Inc. Project), AMT, 6.625% due 9/15/2012 5,879 5,000 New Jersey EDA, Water Facilities Revenue Refunding Bonds (American Water), AMT, Series B, 5.125% due 4/01/2022 (a) 5,198 New Jersey State Transportation Trust Fund Authority, Transportation System Revenue Bonds, Series D: 4,215 5% due 6/15/2018 (a) 4,471 11,120 5% due 6/15/2019 (e) 11,764 New Mexico--3.9% Farmington, New Mexico, PCR, Refunding: 3,000 (Public Service Company of New Mexico-- San Juan Project), Series D, 6.375% due 4/01/2022 3,066 9,000 (Tucson Electric Power Company-- San Juan Project), Series A, 6.95% due 10/01/2020 9,225 9,520 New Mexico Finance Authority, Senior Lien State Transportation Revenue Bonds, Series A, 5.125% due 6/15/2018 (f) 10,153 New York--26.0% 1,090 Dutchess County, New York, IDA, Civic Facility Revenue Bonds (Saint Francis Hospital), Series B, 7.25% due 3/01/2019 1,190 10,500 Metropolitan Transportation Authority, New York, Revenue Refunding Bonds, Series A, 5.75% due 11/15/2032 11,312 875 New York City, New York, City IDA, Civic Facility Revenue Bonds (Special Needs Facilities Pooled Program), Series C-1, 5.50% due 7/01/2007 876 Face Amount Municipal Bonds Value New York (concluded) $ 3,500 New York City, New York, City IDA, Special Facility Revenue Bonds (Continental Airlines Inc. Project), AMT, 8.375% due 11/01/2016 $ 3,870 1,110 New York City, New York, City Transitional Finance Authority, Future Tax Secured Revenue Bonds, Series C, 5.50% due 5/01/2009 (g) 1,157 5,000 New York City, New York, GO, Refunding, Series B, 5.75% due 8/01/2015 5,401 2,055 New York City, New York, IDA, Civic Facility Revenue Bonds (Special Needs Facilities Pooled Program), Series C-1, 6.80% due 7/01/2019 2,191 9,070 New York City, New York, Sales Tax Asset Receivable Corporation Revenue Bonds, Series A, 5% due 10/15/2020 (f) 9,573 5,580 New York State Dormitory Authority, Lease Revenue Refunding Bonds (Court Facilities), Series A, 5.25% due 5/15/2012 5,885 New York State Dormitory Authority, Non-State Supported Debt, Revenue Refunding Bonds (Mount Sinai-NYU Medical Center Health System), Series A: 2,385 6.625% due 7/01/2018 2,545 4,615 6.625% due 7/01/2018 (g) 5,026 1,330 6.625% due 7/01/2019 1,418 3,670 6.625% due 7/01/2019 (g) 3,997 New York State Dormitory Authority Revenue Bonds: 1,000 (North Shore L I Jewish Group), 5% due 5/01/2012 1,039 9,540 (School Districts Financing Program), Series D, 5.25% due 10/01/2023 (f) 10,116 7,775 New York State Dormitory Authority, Revenue Refunding Bonds (City University System), Consolidated Second Generation, Series A, 6.125% due 7/01/2013 (a) 8,355 7,380 New York State Environmental Facilities Corporation, State Personal Income Tax Revenue Bonds, Series A, 5.25% due 12/15/2014 (c)(g) 8,020 60 New York State Thruway Authority, Local Highway and Bridge Service Contract, Revenue Refunding Bonds, 5.50% due 4/01/2017 64 New York State Urban Development Corporation, Correctional and Youth Facilities Services, Revenue Refunding Bonds, Series A: 825 5.50% due 1/01/2011 (g) 871 10,825 5.50% due 1/01/2017 11,384 10,000 New York State Urban Development Corporation, Personal Income Tax Revenue Bonds (State Facilities), Series A-1, 5.25% due 3/15/2034 (c) 10,606 5,000 Port Authority of New York and New Jersey, Senior Consolidated Revenue Bonds, AMT, 131st Series, 5% due 12/15/2017 (b) 5,256 Tobacco Settlement Financing Corporation of New York Revenue Bonds: 3,340 Series A-1, 5.50% due 6/01/2016 3,484 6,510 Series A-1, 5.25% due 6/01/2022 (a) 6,915 9,750 Series C-1, 5.50% due 6/01/2020 (c) 10,513 7,000 Series C-1, 5.50% due 6/01/2021 7,528 10,000 Series C-1, 5.50% due 6/01/2022 10,733 ANNUAL REPORTS MAY 31, 2007 Schedule of Investments (continued) BlackRock Muni Intermediate Duration Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value North Carolina--1.9% $ 3,105 Gaston County, North Carolina, Industrial Facilities and Pollution Control Financing Authority, Revenue Bonds (National Gypsum Company Project), AMT, 5.75% due 8/01/2035 $ 3,256 800 North Carolina Capital Facilities Finance Agency, Exempt Facilities Revenue Bonds (Republic Services Inc. Project), VRDN, AMT, 3.89% due 7/01/2034 (h) 800 6,000 North Carolina Medical Care Commission, Health Care Facilities, First Mortgage Revenue Refunding Bonds (Presbyterian Homes Project), 7% due 10/01/2010 (g) 6,632 Ohio--0.2% 1,280 Port of Greater Cincinnati Development Authority, Ohio, Special Assessment Revenue Bonds (Cooperative Public Parking Infrastructure Project), 6.30% due 2/15/2024 1,378 Pennsylvania--6.4% 3,500 Montgomery County, Pennsylvania, IDA, Revenue Bonds (Whitemarsh Continuing Care Project), 6% due 2/01/2021 3,675 7,710 Pennsylvania Economic Development Financing Authority, Exempt Facilities Revenue Bonds (National Gypsum Company), AMT, Series A, 6.25% due 11/01/2027 8,055 7,490 Philadelphia, Pennsylvania, Gas Works Revenue Refunding Bonds, 1975 General Ordinance, 17th Series, 5.375% due 7/01/2022 (e) 7,995 9,630 Pittsburgh, Pennsylvania, GO, Refunding, Series B, 5.25% due 9/01/2017 (e) 10,472 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Refunding Bonds (Guthrie Healthcare System), Series A: 4,615 6.25% due 12/01/2011 (g) 5,090 455 6.25% due 12/01/2015 495 785 6.25% due 12/01/2016 855 385 6.25% due 12/01/2018 417 South Carolina--2.2% 8,000 Georgetown County, South Carolina, Pollution Control Facilities, Revenue Refunding Bonds (International Paper Company Project), Series A, 5.125% due 2/01/2012 8,216 4,250 Medical University Hospital Authority, South Carolina, Mortgage Hospital Facilities, Revenue Refunding Bonds, Series A, 5.25% due 8/15/2023 (d)(f)(k) 4,500 Tennessee--4.3% 1,800 Johnson City, Tennessee, Health and Educational Facilities Board, Retirement Facility Revenue Bonds (Appalachian Christian Village Project), Series A, 6% due 2/15/2019 1,820 5,000 McMinn County, Tennessee, IDB, PCR (Calhoun Newsprint Co. Project), AMT, 7.625% due 3/01/2016 5,025 2,005 Memphis-Shelby County, Tennessee, Airport Authority, Airport Revenue Bonds, AMT, Series A, 5.50% due 3/01/2017 (e) 2,096 100 Sevier County, Tennessee, Public Building Authority, Local Government Public Improvement Revenue Bonds, VRDN, Series IV-F-1, 3.84% due 6/01/2025 (a)(h) 100 Shelby County, Tennessee, Health, Educational and Housing Facility Board, Hospital Revenue Refunding Bonds (Methodist Healthcare) (g): 6,000 6% due 9/01/2012 6,596 3,500 6.25% due 9/01/2012 3,889 Face Amount Municipal Bonds Value Tennessee (concluded) Shelby County, Tennessee, Health, Educational and Housing Facilities Board Revenue Bonds (Germantown Village), Series A: $ 3,550 6.75% due 12/01/2018 $ 3,492 1,450 7% due 12/01/2023 1,451 Texas--13.6% Austin, Texas, Convention Center Revenue Bonds (Convention Enterprises Inc.), First Tier, Series A (g): 6,230 6.375% due 1/01/2011 6,675 10,260 6.70% due 1/01/2011 11,208 1,500 Bexar County, Texas, Health Facilities Development Corporation, Revenue Refunding Bonds (Army Retirement Residence Project), 6.30% due 7/01/2012 (g) 1,672 Brazos River Authority, Texas, PCR, Refunding (TXU Energy Company LLC Project), AMT, Series A: 5,085 7.70% due 4/01/2033 5,720 1,500 6.75% due 4/01/2038 1,620 4,000 Dallas-Fort Worth, Texas, International Airport Facility Improvement Corporation, Revenue Bonds (Learjet Inc.), AMT, Series A-1, 6.15% due 1/01/2016 4,026 5,000 Dallas-Fort Worth, Texas, International Airport Facility Improvement Corporation, Revenue Refunding Bonds, AMT, Series A-2, 9% due 5/01/2029 6,120 2,440 Gulf Coast, Texas, IDA, Solid Waste Disposal Revenue Bonds (Citgo Petroleum Corporation Project), AMT, 7.50% due 5/01/2025 2,720 3,000 Gulf Coast Waste Disposal Authority, Texas, Revenue Refunding Bonds (International Paper Company), AMT, Series A, 6.10% due 8/01/2024 3,183 700 Harris County, Texas, Health Facilities Development Corporation, Hospital Revenue Bonds (Texas Children's Hospital), VRDN, Series B-1, 3.85% due 10/01/2029 (f)(h) 700 5,790 Houston, Texas, Airport System Revenue Refunding Bonds, Sub-Lien, AMT, Series A, 5.50% due 7/01/2023 (e) 6,002 1,500 Houston, Texas, Health Facilities Development Corporation, Retirement Facility Revenue Bonds (Buckingham Senior Living Community), Series A, 7% due 2/15/2023 1,658 7,420 Lower Colorado River Authority, Texas, PCR (Samsung Austin Semiconductor), AMT, 6.95% due 4/01/2030 7,976 2,600 Matagorda County, Texas, Navigation District Number 1, Revenue Refunding Bonds (Reliant Energy Inc.), Series C, 8% due 5/01/2029 2,720 2,300 Port Corpus Christi, Texas, Individual Development Corporation, Environmental Facilities Revenue Bonds (Citgo Petroleum Corporation Project), AMT, 8.25% due 11/01/2031 2,352 5,000 Sabine River Authority, Texas, PCR, Refunding (TXU Electric Company Project/TXU Energy Company LLC), AMT, Series B, 5.75% due 5/01/2030 5,137 8,000 Texas State Affordable Housing Corporation, S/F Mortgage Revenue Bonds (Professional Educators Home Loan Program), AMT, Series A-3, 5.60% due 2/01/2039 (l)(m) 8,483 ANNUAL REPORTS MAY 31, 2007 Schedule of Investments (concluded) BlackRock Muni Intermediate Duration Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value Virginia--4.6% James City County, Virginia, IDA, Residential Care Facility Revenue Refunding Bonds, Series A: $ 3,285 5.75% due 3/01/2017 $ 3,427 1,150 6% due 3/01/2023 1,219 2,250 Loudoun County, Virginia, IDA, IDR, Refunding (Dulles Airport Marriott Hotel), 7.125% due 9/01/2015 2,266 10,735 Pocahontas Parkway Association, Virginia, Toll Road Revenue Bonds, Senior-Series A, 5.50% due 8/15/2008 (g) 11,169 7,800 Tobacco Settlement Financing Corporation of Virginia, Asset-Backed Revenue Bonds, 5.625% due 6/01/2015 (g) 8,628 Washington--2.1% 1,500 Seattle, Washington, Municipal Light and Power Revenue Bonds, 5.30% due 12/01/2020 (f) 1,564 10,000 Snohomish County, Washington, School District No. 015 (Edmonds), GO, 5% due 12/01/2019 (c) 10,618 Guam--0.8% 4,250 Commonwealth of the Northern Mariana Islands, Guam, GO, Series A, 6.75% due 10/01/2033 4,817 Puerto Rico--7.8% 1,820 Puerto Rico Commonwealth, Public Improvement, GO, Refunding, Series B, 5.25% due 7/01/2032 1,921 17,935 Puerto Rico Electric Power Authority, Power Revenue Bonds, Series NN, 5.50% due 7/01/2013 (g) 19,526 5,390 Puerto Rico Industrial, Medical and Environmental Pollution Control Facilities Financing Authority, Special Facilities Revenue Bonds (American Airlines Inc.), Series A, 6.45% due 12/01/2025 5,474 Puerto Rico Public Buildings Authority, Government Facilities Revenue Refunding Bonds: 5,170 Series D, 5.25% due 7/01/2027 5,378 8,000 Series I, 5.50% due 7/01/2021 8,611 3,535 Puerto Rico Public Finance Corporation, Commonwealth Appropriation Revenue Bonds, Series E, 5.50% due 8/01/2029 3,709 Face Amount Municipal Bonds Value U.S. Virgin Islands--1.6% $ 1,860 Virgin Islands Government Refinery Facilities, Revenue Refunding Bonds (Hovensa Coker Project), AMT, 6.50% due 7/01/2021 $ 2,083 6,750 Virgin Islands Public Finance Authority, Refinery Facilities Revenue Bonds (Hovensa Refinery), AMT, 6.125% due 7/01/2022 7,357 Total Municipal Bonds (Cost--$836,039)--150.9% 866,223 Municipal Bonds Held in Trust (n) California--3.3% 17,730 California Pollution Control Financing Authority, PCR, Refunding (Pacific Gas and Electric), AMT, Series A, 5.35% due 12/01/2016 (f) 18,805 New York--2.1% 11,100 New York City, New York, Sales Tax Asset Receivable Corporation Revenue Bonds, Series A, 5.25% due 10/15/2027 (a) 11,919 Texas--5.6% 31,240 Harris County, Texas, Toll Road Revenue Refunding Bonds, Senior Lien, Series A, 5.25% due 8/15/2035 (e) 32,545 Total Municipal Bonds Held in Trust (Cost--$63,256)--11.0% 63,269 Total Investments (Cost--$899,295*)--161.9% 929,492 Liabilities in Excess of Other Assets--(0.8%) (4,862) Liabilities for Trust Certificates, Including Interest Expense Payable--(5.3%) (30,234) Preferred Stock, at Redemption Value--(55.8%) (320,171) ---------- Net Assets Applicable to Common Stock--100.0% $ 574,225 ========== * The cost and unrealized appreciation (depreciation) of investments as of May 31, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost $ 869,436 =============== Gross unrealized appreciation $ 32,317 Gross unrealized depreciation (2,296) --------------- Net unrealized appreciation $ 30,021 =============== (a) AMBAC Insured. (b) CIFG Insured. (c) FGIC Insured. (d) FHA Insured. (e) FSA Insured. (f) MBIA Insured. (g) Prerefunded. (h) Security may have a maturity of more than one year at time of issuance, but has variable rate and demand features that qualify it as a short-term security. The rate disclosed is that currently in effect. This rate changes periodically based upon prevailing market rates. (i) All or a portion of security held as collateral in connection with open financial futures contracts. (j) XL Capital Insured. (k) Federal Housing Administration/Veterans' Administration Mortgages packaged by the Federal National Mortgage Association. (l) FHLMC Collateralized. (m) FNMA/GNMA Collateralized. (n) Securities represent underlying bonds transferred to a separate securitization trust established in a tender option bond transaction in which the Fund may have acquired the residual interest certificates. These securities serve as collateral in a financing transaction. See Note 1(c) to Financial Statements for details of municipal bonds held in trust. o Financial futures contracts sold as of May 31, 2007 were as follows: Number of Expiration Face Unrealized Contracts Issue Date Value Depreciation 350 10-Year U.S. September Treasury Bond 2007 $ 37,328 $ (97) See Notes to Financial Statements. ANNUAL REPORTS MAY 31, 2007 Schedule of Investments As of May 31, 2007 BlackRock Muni New York Intermediate Duration Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value New York--131.3% $ 1,280 Albany County, New York, IDA, IDR (Special Needs Facilities Pooled Program), Series K-1, 5% due 7/01/2026 (a) $ 1,322 760 Albany, New York, IDA, Civic Facility Revenue Refunding Bonds (Albany College of Pharmacy Project), Series A, 5.25% due 12/01/2019 793 Cattaraugus County, New York, IDA, Civic Facility Revenue Bonds (Saint Bonaventure University Project), Series A: 695 4.90% due 5/01/2016 712 500 5% due 5/01/2023 513 435 Dutchess County, New York, IDA, Civic Facility Revenue Bonds (Saint Francis Hospital), Series B, 7.25% due 3/01/2019 475 750 Dutchess County, New York, IDA, Civic Facility Revenue Refunding Bonds (Bard College), Series A-1, 5% due 8/01/2022 777 2,000 Erie County, New York, IDA, Life Care Community Revenue Bonds (Episcopal Church Home), Series A, 5.875% due 2/01/2018 2,053 1,000 Erie County, New York, IDA, Revenue Bonds (Orchard Park CCRC, Inc. Project), Series A, 6% due 11/15/2026 1,061 3,835 Erie County, New York, IDA, School Facility Revenue Bonds (City of Buffalo Project), 5.75% due 5/01/2024 (e) 4,033 500 Essex County, New York, IDA, Environmental Improvement Revenue Bonds (International Paper Company Project), AMT, Series A, 4.60% due 12/01/2030 476 750 Essex County, New York, IDA, Solid Waste Disposal, Revenue Refunding Bonds (International Paper Company), AMT, Series A, 5.20% due 12/01/2023 771 500 Genesee County, New York, IDA, Civic Facility Revenue Refunding Bonds (United Memorial Medical Center Project), 4.75% due 12/01/2014 499 1,000 Hempstead Town, New York, IDA, Resource Recovery Revenue Refunding Bonds (American Refinery-Fuel Co. Project), 5% due 12/01/2010 1,020 5,000 Long Island Power Authority, New York, Electric System Revenue Refunding Bonds, Series D, 5% due 9/01/2025 (g) 5,264 1,000 New York City, New York, City Housing Development Corporation, M/F Housing Revenue Bonds, AMT, Series J-2, 4.75% due 11/01/2027 990 1,615 New York City, New York, City Housing Development Corporation, Presidential Revenue Bonds (The Animal Medical Center), Series A, 5.50% due 12/01/2033 1,677 1,415 New York City, New York, City IDA, Civic Facility Revenue Bonds (PSCH Inc. Project), 6.20% due 7/01/2020 1,501 1,160 New York City, New York, City IDA, Civic Facility Revenue Refunding Bonds (Special Needs Facilities Pooled Program), Series A-1, 5.15% due 7/01/2015 (a) 1,225 New York City, New York, City IDA, PILOT Revenue Bonds: 2,000 (Queens Baseball Stadium Project), 5% due 1/01/2031 (b) 2,109 2,400 (Yankee Stadium Project), 5% due 3/01/2031 (d) 2,527 Face Amount Municipal Bonds Value New York (continued) New York City, New York, City IDA, Special Facility Revenue Bonds, AMT: $1,500 (1990 American Airlines Inc. Project), 5.40% due 7/01/2020 $ 1,487 1,000 (British Airways Plc Project), 7.625% due 12/01/2032 1,107 1,000 (Continental Airlines Inc. Project), 8.375% due 11/01/2016 1,106 1,000 (Terminal One Group Association Project), 5.50% due 1/01/2024 1,072 New York City, New York, GO, Series J: 2,095 5.50% due 6/01/2013 (h) 2,275 1,500 5.25% due 5/15/2018 (g) 1,607 905 5.50% due 6/01/2021 970 1,775 New York City, New York, GO, Sub-Series F-1, 5% due 9/01/2026 1,849 500 New York City, New York, Trust for Cultural Resources Revenue Bonds (Museum of American Folk Art), 6.125% due 7/01/2030 (a) 535 2,750 New York Convention Center Development Corporation, New York, Revenue Bonds (Hotel Unit Fee Secured), 5% due 11/15/2024 (b) 2,893 600 New York State Dormitory Authority, Mental Health Services Facilities Improvement, Revenue Bonds, Series B, 5% due 2/15/2030 (b) 626 1,000 New York State Dormitory Authority, Non-State Supported Debt Revenue Bonds (Saint Johns University), Series A, 5% due 7/01/2027 (g) 1,060 New York State Dormitory Authority, Non-State Supported Debt, Revenue Refunding Bonds (Mount Sinai-NYU Center Health System), Series A: 330 6.50% due 7/01/2010 (h) 358 660 6.625% due 7/01/2010 (h) 719 670 6.50% due 7/01/2015 714 340 6.625% due 7/01/2018 363 1,130 New York State Dormitory Authority, Non-State Supported Debt, Revenue Refunding Bonds (New York University Hospital Center), Series A, 5% due 7/01/2016 1,167 New York State Dormitory Authority Revenue Bonds: 1,500 (North Shore Long Island Jewish Group), 5% due 5/01/2013 1,565 1,735 (Winthrop S. Nassau University), 5.50% due 7/01/2011 1,817 New York State Dormitory Authority Revenue Refunding Bonds: 1,305 (Lenox Hill Hospital Obligation Group), 5.75% due 7/01/2017 1,369 1,000 (State University Educational Facilities), Series A, 5.50% due 5/15/2013 1,067 1,790 New York State Dormitory Authority, State Personal Income Tax Revenue Bonds (Education), Series F, 5% due 3/15/2030 1,872 1,500 New York State Dormitory Authority, Supported Debt Revenue Refunding Bonds (Department of Health), Series A, 5% due 7/01/2025 (c) 1,566 ANNUAL REPORTS MAY 31, 2007 Schedule of Investments (continued) BlackRock Muni New York Intermediate Duration Fund, Inc. (In Thousands) Face Amount Municipal Bonds Value New York (continued) $ 500 New York State Energy Research and Development Authority, Gas Facilities Revenue Refunding Bonds (Brooklyn Union Gas Company/Keyspan), AMT, Series A, 4.70% due 2/01/2024 (d) $ 506 1,000 New York State Environmental Facilities Corporation, Solid Waste Disposal Revenue Bonds (Waste Management Inc. Project), AMT, Series A, 4.45% due 7/01/2017 998 1,185 New York State, HFA, M/F Housing Revenue Bonds (Kensico Terrace Apartments), AMT, Series A, 4.75% due 8/15/2026 1,167 New York State Mortgage Agency, Homeowner Mortgage Revenue Bonds, AMT: 2,635 Series 130, 4.75% due 10/01/2030 2,596 500 Series 143, 4.85% due 10/01/2027 502 New York State Mortgage Agency, Homeowner Mortgage Revenue Refunding Bonds, AMT: 1,000 Series 133, 4.95% due 10/01/2021 1,014 1,000 Series 137, 4.70% due 10/01/2031 976 500 Series 140, 4.65% due 10/01/2026 486 2,000 New York State Municipal Bond Bank Agency, Special School Purpose Revenue Bonds, Series C, 5.25% due 12/01/2018 2,118 500 New York State Thruway Authority, General Revenue Refunding Bonds, Series G, 4.75% due 1/01/2030 (e) 511 2,000 New York State Urban Development Corporation Revenue Bonds, Subordinate Lien, Corporation Purpose, Series A, 5.125% due 7/01/2019 2,112 Saratoga County, New York, IDA Civic Facility Revenue Refunding Bonds (The Saratoga Hospital Project), Series A, (i): 365 4.375% due 12/01/2013 372 380 4.50% due 12/01/2014 388 395 4.50% due 12/01/2015 403 1,000 Schenectady, New York, IDA, Civic Facility Revenue Refunding Bonds (Union College Project), 5% due 7/01/2026 1,050 800 Suffolk County, New York, IDA, Continuing Care and Retirement, Revenue Refunding Bonds (Jeffersons Ferry Project), 4.625% due 11/01/2016 801 1,000 Tobacco Settlement Financing Corporation of New York, Asset-Backed Revenue Bonds, Series A-1, 5.25% due 6/01/2016 1,036 1,000 Tobacco Settlement Financing Corporation of New York Revenue Bonds, Series C-1, 5.50% due 6/01/2022 1,073 Tompkins County, New York, IDA, Care Community Revenue Refunding Bonds (Kendal at Ithaca), Series A-2: 250 5.75% due 7/01/2018 253 1,000 6% due 7/01/2024 1,017 1,000 Triborough Bridge and Tunnel Authority, New York, Revenue Bonds, Series A, 5% due 11/15/2031 1,051 1,250 Utica, New York, IDA, Civic Facility Revenue Bonds (Utica College Project), Series A, 6.875% due 6/01/2009 (h) 1,331 Face Amount Municipal Bonds Value New York (concluded) Westchester County, New York, IDA, Civic Facility Revenue Bonds (Special Needs Facilities Pooled Program): $ 515 Series D-1, 6.80% due 7/01/2019 $ 546 305 Series E-1, 5.50% due 7/01/2007 305 750 Yonkers, New York, IDA, Revenue Bonds (Sacred Heart Associates, LP Project), AMT, Series A, 4.80% due 10/01/2026 755 Guam--3.4% 1,000 A.B. Won Guam International Airport Authority, General Revenue Refunding Bonds, AMT, Series C, 5.25% due 10/01/2022 (g) 1,035 1,000 Guam Government Waterworks Authority, Water and Wastewater System, Revenue Refunding Bonds, 6% due 7/01/2025 1,089 Puerto Rico--8.7% Children's Trust Fund Project of Puerto Rico, Tobacco Settlement Revenue Refunding Bonds: 750 5% due 5/15/2011 771 990 5.375% due 5/15/2033 1,035 1,000 Puerto Rico Commonwealth Highway and Transportation Authority, Transportation Revenue Refunding Bonds, Series K, 5% due 7/01/2030 1,031 500 Puerto Rico Commonwealth Infrastructure Financing Authority, Special Tax Bonds, Series B, 5% due 7/01/2031 516 1,000 Puerto Rico Commonwealth, Public Improvement, GO, Series A, 5.25% due 7/01/2030 1,058 1,000 Puerto Rico Municipal Finance Agency, GO, Series A, 5.25% due 8/01/2025 1,054 U.S. Virgin Islands--3.4% 500 Virgin Islands Government Refinery Facilities, Revenue Refunding Bonds (Hovensa Coker Project), AMT, 6.50% due 7/01/2021 560 500 Virgin Islands Public Finance Authority, Refinery Facilities Revenue Bonds (Hovensa Refinery), AMT, 4.70% due 7/01/2022 498 1,000 Virgin Islands Public Finance Authority, Senior Lien Revenue Bonds (Matching Fund Loan Note), Series A, 5.25% due 10/01/2024 1,055 Total Municipal Bonds (Cost--$89,221)--146.8% 92,031 Shares Held Short-Term Securities 980 CMA New York Municipal Money Fund, 3.21% (f)(j) 980 Total Short-Term Securities (Cost--$980)--1.6% 980 Total Investments (Cost--$90,201*)--148.4% 93,011 Other Assets Less Liabilities--1.1% 699 Preferred Stock, at Redemption Value--(49.5%) (31,009) ---------- Net Assets--100.0% $ 62,701 ========== ANNUAL REPORTS MAY 31, 2007 Schedule of Investments (concluded) BlackRock Muni New York Intermediate Duration Fund, Inc. (In Thousands) * The cost and unrealized appreciation (depreciation) of investments as of May 31, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost $ 90,124 =============== Gross unrealized appreciation $ 3,034 Gross unrealized depreciation (147) --------------- Net unrealized appreciation $ 2,887 =============== (a) ACA Insured. (b) AMBAC Insured. (c) CIFG Insured. (d) FGIC Insured. (e) FSA Insured. (f) Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows: Net Dividend Affiliate Activity Income CMA New York Municipal Money Fund (1,361) $37 (g) MBIA Insured. (h) Prerefunded. (i) Radian Insured. (j) Represents the current yield as of May 31, 2007. o Forward interest rate swaps outstanding as of May 31, 2007 were as follows: Notional Unrealized Amount Appreciation Pay a fixed rate of 3.834% and receive a floating rate based on 1 week Bond Market Association rate Broker, JPMorgan Chase Expires August 2017 $ 3,750 $2 See Notes to Financial Statements. ANNUAL REPORTS MAY 31, 2007 Statements of Net Assets BlackRock BlackRock Muni Muni New York Intermediate Intermediate Duration Duration As of May 31, 2007 Fund, Inc. Fund, Inc. Assets Investments in unaffiliated securities, at value* $ 929,492,124 $ 92,030,492 Investments in affiliated securities, at value** -- 980,248 Cash 99,132 33,290 Interest receivable 15,773,718 1,416,046 Receivables for swaps -- 53,660 Unrealized appreciation on forward interest rate swaps -- 1,821 Prepaid expenses 25,903 12,390 --------------- --------------- Total assets 945,390,877 94,527,947 --------------- --------------- Liabilities Trust certificates 30,035,000 -- Payable for securities purchased 17,703,375 500,000 Dividends payable to Common Stock shareholders 2,320,131 222,941 Payable for interest expense 361,242 -- Payable to investment adviser 305,128 31,837 Payable for variation margin 38,281 -- Payable to other affiliates 11,560 1,200 Accrued expenses 220,716 61,362 --------------- --------------- Total liabilities 50,995,433 817,340 --------------- --------------- Preferred Stock Preferred Stock, at redemption value, par value $.10 per share++ of AMPS+++ at $25,000 per share liquidation preference 320,170,897 31,009,224 --------------- --------------- Net Assets Applicable to Common Stock Net assets applicable to Common Stock $ 574,224,547 $ 62,701,383 =============== =============== Analysis of Net Assets Applicable to Common Stock Undistributed investment income--net $ 4,522,630 $ 394,182 Accumulated realized capital losses--net (900,127) (134,161) Unrealized appreciation--net 30,100,538 2,811,250 --------------- --------------- Total accumulated earnings--net 33,723,041 3,071,271 --------------- --------------- Common Stock, par value $.10 per share++++ 3,803,493 420,644 Paid-in capital in excess of par 536,698,013 59,209,468 =============== =============== Net Assets Applicable to Common Stock $ 574,224,547 $ 62,701,383 =============== =============== Net asset value per share of Common Stock $ 15.10 $ 14.91 =============== =============== Market price per share of Common Stock $ 14.85 $ 13.93 =============== =============== * Identified cost for unaffiliated securities $ 899,294,791 $ 89,221,063 =============== =============== ** Identified cost for affiliated securities -- $ 980,248 =============== =============== ++ Preferred Stock authorized, issued and outstanding: Series M7 Shares 2,000 -- =============== =============== Series T7 Shares 2,700 -- =============== =============== Series W7 Shares 2,000 -- =============== =============== Series TH7 Shares 2,700 -- =============== =============== Series F7 Shares 2,000 1,240 =============== =============== Series TH28 Shares 1,400 -- =============== =============== ++++ Common Stock issued and outstanding 38,034,934 4,206,439 =============== =============== +++ Auction Market Preferred Stock. See Notes to Financial Statements. ANNUAL REPORTS MAY 31, 2007 Statements of Operations BlackRock BlackRock Muni Muni New York Intermediate Intermediate Duration Duration For the Year Ended May 31, 2007 Fund, Inc. Fund, Inc. Investment Income Interest $ 45,208,735 $ 4,429,009 Dividends from affiliates -- 36,876 --------------- --------------- Total income 45,208,735 4,465,885 --------------- --------------- Expenses Investment advisory fees $ 4,954,571 $ 517,220 Interest expense and fees 1,154,741 -- Commission fees 813,894 78,591 Accounting services 256,314 61,965 Transfer agent fees 94,838 27,359 Professional fees 62,164 49,692 Printing and shareholder reports 56,495 6,318 Custodian fees 45,210 8,115 Trustees' fees and expenses 21,284 20,988 Listing fees 23,447 16,572 Pricing fees 28,717 10,206 Other 75,978 27,895 --------------- --------------- Total expenses before waiver and/or reimbursement 7,587,653 824,921 Waiver and/or reimbursement of expenses (1,351,247) (146,058) --------------- --------------- Total expenses after waiver and/or reimbursement 6,236,406 678,863 --------------- --------------- Investment income--net 38,972,329 3,787,022 --------------- --------------- Realized & Unrealized Gain (Loss)--Net Realized gain (loss) on: Investments--net 2,093,466 174,071 Financial futures contracts and forward interest rate swaps--net (2,233,053) (26,609) --------------- --------------- Total realized gain (loss)--net (139,587) 147,462 --------------- --------------- Change in unrealized appreciation/depreciation on: Investments--net 7,270,695 840,506 Financial futures contracts and forward interest rate swaps--net (180,141) 1,821 --------------- --------------- Total change in unrealized appreciation/depreciation--net 7,090,554 842,327 --------------- --------------- Total realized and unrealized gain--net 6,950,967 989,789 --------------- --------------- Dividends & Distributions to Preferred Stock Shareholders Investment income--net (10,462,698) (1,046,683) Realized gain--net (1,446,608) -- --------------- --------------- Total dividends and distributions to Preferred Stock shareholders (11,909,306) (1,046,683) --------------- --------------- Net Increase in Net Assets Resulting from Operations $ 34,013,990 $ 3,730,128 =============== =============== See Notes to Financial Statements. ANNUAL REPORTS MAY 31, 2007 Statements of Changes in Net Assets BlackRock Muni Intermediate Duration Fund, Inc. For the Year Ended May 31, Increase (Decrease) in Net Assets: 2007 2006 Operations Investment income--net $ 38,972,329 $ 39,613,750 Realized gain (loss)--net (139,587) 6,991,310 Change in unrealized appreciation/depreciation--net 7,090,554 (12,769,857) Dividends and distributions to Preferred Stock shareholders (11,909,306) (9,360,228) --------------- --------------- Net increase in net assets resulting from operations 34,013,990 24,474,975 --------------- --------------- Dividends & Distributions to Common Stock Shareholders Investment income--net (28,297,991) (32,101,484) Realized gain--net (4,525,473) (8,646,634) --------------- --------------- Net decrease in net assets resulting from dividends and distributions to Common Stock shareholders (32,823,464) (40,748,118) --------------- --------------- Stock Transactions Offering and underwriting costs resulting from the issuance of Preferred Stock -- (494,868) --------------- --------------- Net decrease in net assets derived from stock transactions -- (494,868) --------------- --------------- Net Assets Applicable to Common Stock Total increase (decrease) in net assets applicable to Common Stock 1,190,526 (16,768,011) Beginning of year 573,034,021 589,802,032 --------------- --------------- End of year* $ 574,224,547 $ 573,034,021 =============== =============== * Undistributed investment income--net $ 4,522,630 $ 4,311,098 =============== =============== See Notes to Financial Statements. Statements of Changes in Net Assets BlackRock Muni New York Intermediate Duration Fund, Inc. For the Year Ended May 31, Increase (Decrease) in Net Assets: 2007 2006 Operations Investment income--net $ 3,787,022 $ 3,671,782 Realized gain--net 147,462 285,861 Change in unrealized appreciation/depreciation--net 842,327 (1,852,166) Dividends to Preferred Stock shareholders (1,046,683) (821,449) --------------- --------------- Net increase in net assets resulting from operations 3,730,128 1,284,028 --------------- --------------- Dividends to Common Stock Shareholders Investment income--net (2,700,534) (2,902,443) --------------- --------------- Net decrease in net assets resulting from dividends to Common Stock shareholders (2,700,534) (2,902,443) --------------- --------------- Net Assets Applicable to Common Stock Total increase (decrease) in net assets applicable to Common Stock 1,029,594 (1,618,415) Beginning of year 61,671,789 63,290,204 --------------- --------------- End of year* $ 62,701,383 $ 61,671,789 =============== =============== * Undistributed investment income--net $ 394,182 $ 354,377 =============== =============== See Notes to Financial Statements. ANNUAL REPORTS MAY 31, 2007 Financial Highlights BlackRock Muni Intermediate Duration Fund, Inc. For the Period For the Year August 1, 2003++ The following per share data and ratios have been derived Ended May 31, to May 31, from information provided in the financial statements. 2007 2006 2005 2004 Per Share Operating Performance Net asset value, beginning of period $ 15.07 $ 15.51 $ 14.52 $ 14.33 ------------ ------------ ------------ ------------ Investment income--net 1.03+++++ 1.04+++++ 1.02+++++ .79 Realized and unrealized gain (loss)--net .18 (.15) 1.15 .21 Dividends and distributions to Preferred Stock shareholders: Investment income--net (.28) (.21) (.11) (.06) Realized gain--net (.04) (.04) (.02) -- ------------ ------------ ------------ ------------ Total from investment operations .89 .64 2.04 .94 ------------ ------------ ------------ ------------ Less dividends and distributions to Common Stock shareholders: Investment income--net (.74) (.84) (.86) (.65) Realized gain--net (.12) (.23) (.19) -- ------------ ------------ ------------ ------------ Total dividends and distributions to Common Stock shareholders (.86) (1.07) (1.05) (.65) ------------ ------------ ------------ ------------ Offering costs resulting from issuance of Common Stock -- -- -- (.02) ------------ ------------ ------------ ------------ Offering and underwriting costs resulting from issuance of Preferred Stock -- (.01) -- (.08) ------------ ------------ ------------ ------------ Net asset value, end of period $ 15.10 $ 15.07 $ 15.51 $ 14.52 ============ ============ ============ ============ Market price per share, end of period $ 14.85 $ 14.52 $ 13.94 $ 13.10 ============ ============ ============ ============ Total Investment Return** Based on net asset value per share 6.14% 4.71% 15.36% 6.09%+++ ============ ============ ============ ============ Based on market price per share 8.34% 12.25% 14.93% (8.59%)+++ ============ ============ ============ ============ Ratios Based on Average Net Assets Applicable to Common Stock Total expenses, net of waiver and excluding interest expense and fees*** .87% .87% .84% .75%* ============ ============ ============ ============ Total expenses, net of waiver*** 1.07% 1.00% .85% .75%* ============ ============ ============ ============ Total expenses*** 1.31% 1.24% 1.07% 1.03%* ============ ============ ============ ============ Investment income--net*** 6.71% 6.82% 6.77% 6.51%* ============ ============ ============ ============ Amount of dividends to Preferred Stock shareholders 1.80% 1.36% .74% .48%* ============ ============ ============ ============ Investment income--net, to Common Stock shareholders 4.91% 5.46% 6.03% 6.03%* ============ ============ ============ ============ Ratios Based on Average Net Assets Applicable to Preferred Stock Dividends to Preferred Stock shareholders 3.27% 2.51% 1.50% .97%* ============ ============ ============ ============ Supplemental Data Net assets applicable to Common Stock, end of period (in thousands) $ 574,225 $ 573,034 $ 589,802 $ 552,179 ============ ============ ============ ============ Preferred Stock outstanding at liquidation preference, end of period (in thousands) $ 320,000 $ 320,000 $ 285,000 $ 285,000 ============ ============ ============ ============ Portfolio turnover 12% 49% 54% 70% ============ ============ ============ ============ Leverage Asset coverage per $1,000 $ 2,794 $ 2,791 $ 3,069 $ 2,937 ============ ============ ============ ============ Dividends Per Share on Preferred Stock Outstanding Series M7++++--Investment income--net $ 809 $ 613 $ 372 $ 190 ============ ============ ============ ============ Series T7++++--Investment income--net $ 818 $ 624 $ 377 $ 192 ============ ============ ============ ============ Series W7++++--Investment income--net $ 818 $ 623 $ 374 $ 188 ============ ============ ============ ============ Series TH7++++--Investment income--net $ 825 $ 631 $ 375 $ 188 ============ ============ ============ ============ Series F7++++--Investment income--net $ 809 $ 611 $ 373 $ 189 ============ ============ ============ ============ Series TH28++++++--Investment income--net $ 826 $ 580 -- -- ============ ============ ============ ============ * Annualized. ** Total investment returns based on market value, which can be significantly greater or lesser than net asset value, may result in substantially different returns. Total investment returns exclude the effects of sales charges. *** Do not reflect the effect of dividends to Preferred Stock shareholders. ++ Commencement of operations. ++++ Issued on August 20, 2003. ++++++ Issued on August 3, 2005. +++ Aggregate total investment return. +++++ Based on average shares outstanding. See Notes to Financial Statements. ANNUAL REPORTS MAY 31, 2007 Financial Highlights (concluded) BlackRock Muni New York Intermediate Duration Fund, Inc. For the Period For the Year August 1, 2003++ The following per share data and ratios have been derived Ended May 31, to May 31, from information provided in the financial statements. 2007 2006 2005 2004 Per Share Operating Performance Net asset value, beginning of period $ 14.66 $ 15.05 $ 14.45 $ 14.33 ------------ ------------ ------------ ------------ Investment income--net .90+++++ .87+++++ .85+++++ .68 Realized and unrealized gain (loss)--net .24 (.37) .58 .19 Dividends to Preferred Stock shareholders from investment income--net (.25) (.20) (.11) (.06) ------------ ------------ ------------ ------------ Total from investment operations .89 .30 1.32 .81 ------------ ------------ ------------ ------------ Less dividends to Common Stock shareholders from investment income--net (.64) (.69) (.72) (.54) ------------ ------------ ------------ ------------ Offering costs resulting from issuance of Common Stock -- -- -- (.03) ------------ ------------ ------------ ------------ Offering and underwriting costs resulting from issuance of Preferred Stock -- -- -- (.12) ------------ ------------ ------------ ------------ Net asset value, end of period $ 14.91 $ 14.66 $ 15.05 $ 14.45 ============ ============ ============ ============ Market price per share, end of period $ 13.93 $ 13.03 $ 13.44 $ 12.79 ============ ============ ============ ============ Total Investment Return** Based on net asset value per share 6.57% 2.52% 9.99% 4.71%+++ ============ ============ ============ ============ Based on market price per share 12.02% 2.03% 10.97% (11.46%)+++ ============ ============ ============ ============ Ratios Based on Average Net Assets Applicable to Common Stock Total expenses, net of waiver and/or reimbursement*** 1.08% 1.10% 1.15% .81%* ============ ============ ============ ============ Total expenses*** 1.31% 1.33% 1.38% 1.19%* ============ ============ ============ ============ Total investment income--net*** 6.01% 5.89% 5.75% 5.40%* ============ ============ ============ ============ Amount of dividends to Preferred Stock shareholders 1.66% 1.32% .77% .45%* ============ ============ ============ ============ Investment income--net, to Common Stock shareholders 4.35% 4.57% 4.98% 4.95%* ============ ============ ============ ============ Ratios Based on Average Net Assets Applicable to Preferred Stock Dividends to Preferred Stock shareholders 3.38% 2.65% 1.55% .96%* ============ ============ ============ ============ Supplemental Data Net assets applicable to Common Stock, end of period (in thousands) $ 62,701 $ 61,672 $ 63,290 $ 60,778 ============ ============ ============ ============ Preferred Stock outstanding at liquidation preference, end of period (in thousands) $ 31,000 $ 31,000 $ 31,000 $ 31,000 ============ ============ ============ ============ Portfolio turnover 29% 49% 17% 21% ============ ============ ============ ============ Leverage Asset coverage per $1,000 $ 3,023 $ 2,989 $ 3,042 $ 2,961 ============ ============ ============ ============ Dividends Per Share on Preferred Stock Outstanding Series F7++++--Investment income--net $ 844 $ 662 $ 389 $ 188 ============ ============ ============ ============ * Annualized. ** Total investment returns based on market value, which can be significantly greater or lesser than net asset value, may result in substantially different returns. Total investment returns exclude the effects of sales charges. *** Do not reflect the effect of dividends to Preferred Stock shareholders. ++ Commencement of operations. ++++ Issued on August 20, 2003. +++ Aggregate total investment return. +++++ Based on average shares outstanding. See Notes to Financial Statements. ANNUAL REPORTS MAY 31, 2007 Notes to Financial Statements 1. Significant Accounting Policies: On September 29, 2006, Muni Intermediate Duration Fund, Inc. and Muni New York Intermediate Duration Fund, Inc. were renamed BlackRock Muni Intermediate Duration Fund, Inc. and BlackRock Muni New York Intermediate Duration Fund, Inc. (the "Funds" or individually as the "Fund"), respectively. The Funds are registered under the Investment Company Act of 1940, as amended, as non- diversified, closed-end management investment companies. The Funds' financial statements are prepared in conformity with U.S. generally accepted accounting principles, which may require the use of management accruals and estimates. Actual results may differ from these estimates. The Funds determine and make available for publication the net asset values of their Common Stock on a daily basis. Each Fund's Common Stock shares are listed on the New York Stock Exchange under the symbol MUI for BlackRock Muni Intermediate Duration Fund, Inc. and MNE for BlackRock Muni New York Intermediate Duration Fund, Inc. (a) Valuation of investments--Municipal bonds are traded primarily in the over- the-counter ("OTC") markets and are valued at the last available bid price in the OTC markets or on the basis of values as obtained by a pricing service. Pricing services use valuation matrixes that incorporate both dealer-supplied valuations and valuation models. The procedures of the pricing service and its valuations are reviewed by the officers of the Funds under the general direction of the respective Board of Directors. Such valuations and procedures are reviewed periodically by the respective Board of Directors of the Funds. Financial futures contracts and options thereon, which are traded on exchanges, are valued at their closing prices as of the close of such exchanges. Options written or purchased are valued at the last sale price in the case of exchange- traded options. Options traded in the OTC market are valued at the last asked price (options written) or the last bid price (options purchased). Swap agreements are valued by quoted fair valuations received daily by the Funds' pricing service. Investments in open-end investment companies are valued at their net asset value each business day. Securities and other assets for which market quotations are not readily available are valued at fair value as determined in good faith by or under the direction of the respective Board of Directors of the Funds. (b) Derivative financial instruments--Each Fund may engage in various portfolio investment strategies both to increase the return of the Fund and to hedge, or protect, its exposure to interest rate movements and movements in the securities markets. Losses may arise due to changes in the value of the contract or if the counterparty does not perform under the contract. * Financial futures contracts--Each Fund may purchase or sell financial futures contracts and options on such financial futures contracts. Financial futures contracts are contracts for delayed delivery of securities at a specific future date and at a specific price or yield. Upon entering into a contract, the Fund deposits, and maintains as collateral, such initial margin as required by the exchange on which the transaction is effected. Pursuant to the contract, the Fund agrees to receive from or pay to the broker an amount of cash equal to the daily fluctuation in value of the contract. Such receipts or payments are known as variation margin and are recorded by the Fund as unrealized gains or losses. When the contract is closed, the Fund records a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed. * Options--Each Fund may purchase and write call and put options. When the Fund writes an option, an amount equal to the premium received by the Fund is reflected as an asset and an equivalent liability. The amount of the liability is subsequently marked-to-market to reflect the current market value of the option written. When a security is purchased or sold through an exercise of an option, the related premium paid (or received) is added to (or deducted from) the basis of the security acquired or deducted from (or added to) the proceeds of the security sold. When an option expires (or the Fund enters into a closing transaction), the Fund realizes a gain or loss on the option to the extent of the premiums received or paid (or gain or loss to the extent the cost of the closing transaction exceeds the premium paid or received). Written and purchased options are non-income producing investments. * Forward interest rate swaps--Each Fund may enter into forward interest rate swaps. In a forward interest rate swap, the Fund and the counterparty agree to make periodic net payments on a specified notional contract amount, commencing on a specified future effective date, unless terminated earlier. When the agreement is closed, the Fund records a realized gain or loss in an amount equal to the value of the agreement. ANNUAL REPORTS MAY 31, 2007 Notes to Financial Statements (continued) * Swaps--Each Fund may enter into swap agreements which are OTC contracts in which the Fund and a counterparty agree to make periodic net payments on a specified notional amount. The net payments can be made for a set period of time or may be triggered by a predetermined credit event. The net periodic payments may be based on a fixed or variable interest rate; the change in market value of a specific security, basket of securities, or index; or the return generated by a security. These periodic payments received or made by the Fund are recorded in the accompanying Statement of Operations as realized gains or losses, respectively. Gains or losses are also realized upon termination of the swap agreements. Swaps are marked-to-market daily and changes in value are recorded as unrealized appreciation (depreciation). Risks include changes in the returns of the underlying instruments, failure of the counterparties to perform under the contracts' terms and the possible lack of liquidity with respect to the swap agreements. (c) Municipal bonds held in trust--BlackRock Muni Intermediate Duration Fund, Inc. invests in leveraged residual certificates ("TOB Residuals") issued by tender option bond trusts ("TOBs"). A TOB is established by a third party sponsor forming a special purpose entity, into which a Fund, or an agent on behalf of the Fund, transfers municipal securities. A TOB typically issues two classes of beneficial interests: short-term floating rate certificates, which are sold to third party investors, and residual certificates, which are generally issued to the Fund which made the transfer or to affiliates of the Fund. The Fund's transfers of the municipal securities to a TOB do not qualify for sale treatment under Statement of Financial Accounting Standards No. 140 "Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities," therefore the municipal securities deposited into a TOB are presented in the Fund's schedule of investments and the proceeds from the transactions are reported as liability for trust certificates. Similarly, proceeds from residual certificates issued to affiliates, if any, from the transaction are included in the liability for trust certificates. Interest income from the underlying security is recorded by the Fund on an accrual basis. Interest expense incurred on the secured borrowing and other expenses related to remarketing, administration and trustee services to a TOB are reported as expenses of a Fund. The floating rate certificates have interest rates that generally reset weekly and their holders have the option to tender certificates to the TOB for redemption at par at each reset date. The residual interests held by the Fund include the right of the Fund (1) to cause the holders of a proportional share of floating rate certificates to tender their certificates at par, and (2) to transfer a corresponding share of the municipal securities from the TOB to the Fund. At May 31, 2007, in reference to BlackRock Muni Intermediate Duration Fund, Inc., the aggregate value of the underlying municipal securities transferred to TOBs was $63,269,180, the related liability for trust certificates was $30,035,000 and the range of interest rates was 3.26% to 4.02%. BlackRock Muni New York Intermediate Duration Fund, Inc. did not invest in these types of securities for the year ended May 31, 2007. Financial transactions executed through TOBs generally will underperform the market for fixed rate municipal bonds in a rising interest rate environment, but tend to outperform the market for fixed rate bonds when interest rates decline or remain relatively stable. Should short-term interest rates rise, a Fund's investments in TOB Residuals likely will adversely affect a Fund's investment income--net and distributions to shareholders. Fluctuations in the market value of municipal securities deposited into the TOB may adversely affect the Fund's net asset value per share. While the Funds' investment policies and restrictions expressly permit investments in inverse floating rate securities such as TOB Residuals, they generally do not allow the Funds to borrow money for purposes of making investments. The Fund's management believes that the Fund's restrictions on borrowings do not apply to the secured borrowings deemed to have occurred for accounting purposes. (d) Income taxes--It is each Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to its shareholders. Therefore, no federal income tax provision is required. (e) Security transactions and investment income--Security transactions are recorded on the dates the trans-actions are entered into (the trade dates). Realized gains and losses on security transactions are determined on the identified cost basis. Dividend income is recorded on the ex-dividend dates. Interest income is recognized on the accrual basis. The Funds amortize all premiums and discounts on debt securities. ANNUAL REPORTS MAY 31, 2007 Notes to Financial Statements (continued) (f) Dividends and distributions--Dividends from net investment income are declared and paid monthly. Distributions of capital gains are recorded on the ex-dividend dates. (g) Offering costs--Direct expenses relating to the public offering of BlackRock Muni Intermediate Duration Fund, Inc.'s Preferred Stock were charged to capital at the time of issuance of the shares. (h) Recent accounting pronouncements--In July 2006, the Financial Accounting Standards Board released FASB Interpretation No. 48 ("FIN 48"), "Accounting for Uncertainty in Income Taxes". FIN 48 provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in financial statements. FIN 48 requires the evaluation of tax positions taken in the course of preparing the Fund's tax returns to determine whether the tax positions are "more-likely-than-not" of being sustained by the applicable tax authority. Tax benefits of positions not deemed to meet the more-likely-than-not threshold would be booked as a tax expense in the current year and recognized as: a liability for unrecognized tax benefits; a reduction of an income tax refund receivable; a reduction of deferred tax asset; an increase in deferred tax liability; or a combination thereof. Adoption of FIN 48 is required for the last net asset value calculation in the first required financial statement reporting period for fiscal years beginning after December 15, 2006. The impact on each Fund's financial statements, if any, is currently being assessed. In September 2006, Statement of Financial Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"), was issued and is effective for fiscal years beginning after November 15, 2007. FAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. At this time, management is evaluating the implications of FAS 157 and its impact on each Fund's financial statements, if any, has not been determined. In addition, in February 2007, FASB issued Statement of Financial Accounting Standards No. 159, "The Fair Value Option for Financial Assets and Financial Liabilities" ("FAS 159"), which is effective for fiscal years beginning after November 15, 2007. Early adoption is permitted as of the beginning of a fiscal year that begins on or before November 15, 2007, provided the entity also elects to apply the provisions of FAS 157. FAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value that are not currently required to be measured at fair value. FAS 159 also establishes presentation and disclosure requirements designed to facilitate comparisons between entities that choose different measurement attributes for similar types of assets and liabilities. At this time, management is evaluating the implications of FAS 159 and its impact on each Fund's financial statements, if any, has not been determined. (i) Reclassifications--BlackRock Muni Intermediate Duration Fund, Inc.--U.S. generally accepted accounting principles require that certain components of net assets be adjusted to reflect permanent differences between financial and tax reporting. Accordingly, during the current year, $162 has been reclassified between paid-in capital in excess of par and accumulated net realized capital losses and $108 has been reclassified between undistributed net investment income and accumulated net realized capital losses as a result of permanent differences attributable to distributions paid in excess of taxable income. These reclassifications have no effect on net assets or net asset value per share. 2. Investment Advisory Agreement and Transactions with Affiliates: On September 29, 2006, BlackRock, Inc. and Merrill Lynch & Co., Inc. ("Merrill Lynch") combined Merrill Lynch's investment management business, Merrill Lynch Investment Managers L.P. ("MLIM") and its affiliates, including Fund Asset Management, L.P. ("FAM"), with BlackRock, Inc. to create a new independent company. Merrill Lynch has a 49.8% economic interest and a 45% voting interest in the combined company and The PNC Financial Services Group, Inc. ("PNC"), has approximately a 34% economic and voting interest. The new company operates under the BlackRock name and is governed by a board of directors with a majority of independent members. On August 15, 2006, shareholders of each Fund approved a new Investment Advisory Agreement with BlackRock Advisors, Inc. (the "Manager"), an indirect, wholly owned subsidiary of BlackRock, Inc. BlackRock Advisors, Inc. was reorganized into a limited liability company and renamed BlackRock Advisors, LLC. The new Investment Advisory Agreement between each Fund and the Manager became effective on September 29, 2006. Prior to September 29, 2006, FAM was each Fund's manager. The general partner of FAM is an indirect, wholly owned subsidiary of Merrill Lynch, which is the limited partner. ANNUAL REPORTS MAY 31, 2007 Notes to Financial Statements (continued) The Manager is responsible for the management of each Fund's portfolio and provides the necessary personnel, facilities, equipment and certain other services necessary to the operations of the Funds. For such services, each Fund pays a monthly fee at an annual rate of .55% of the Fund's average daily net assets, including proceeds from the issuance of Preferred Stock. The Manager (and formerly FAM) has contractually agreed to waive a portion of its fee during the first seven years of each Fund's operations ending July 31, 2010, as follows: Fee Waiver (As a Percentage of Average Daily Net Assets) Years 1 through 5 .15% Year 6 .10% Year 7 .05% Year 8 and thereafter .00% The Manager has not agreed to waive any portion of its fee beyond July 31, 2010. For the period June 1, 2006 to September 29, 2006, FAM earned fees and waived a portion of its fees as follows: Investment Advisory Fees Fees Earned by Waived by FAM FAM BlackRock Muni Intermediate Duration Fund, Inc. $1,660,595 $452,890 BlackRock Muni New York Intermediate Duration Fund, Inc. $ 172,505 $ 47,047 For the period September 30, 2006 to May 31, 2007, the Manager earned fees and waived a portion of its fees as follows: Investment Advisory Fees Fees Earned by Waived by the Manager the Manager BlackRock Muni Intermediate Duration Fund, Inc. $3,293,976 $ 898,357 BlackRock Muni New York Intermediate Duration Fund, Inc. $ 344,715 $ 94,012 In addition, FAM and/or the Manager has agreed to reimburse its management fee by the amount of management fees BlackRock Muni New York Intermediate Duration Fund, Inc. pays to FAM and/or the Manager indirectly through its investment in CMA New York Municipal Money Fund. The reimbursements were as follows: For the Period For the Period June 1, 2006 to September 30, 2006 September 29, 2006 to May 31, 2007 Reimbursement Reimbursement by FAM by the Manager $2,660 $2,339 In addition, the Manager has entered into a sub-advisory agreement with BlackRock Investment Management, LLC, ("BIM"), an affiliate of the Manager, with respect to each Fund, under which the Manager pays BIM for services it provides a monthly fee that is a percentage of the management fee paid by each Fund to the Manager. For the year ended May 31, 2006, Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S"), a wholly owned subsidiary of Merrill Lynch and an affiliate of FAM, received underwriting fees of $350,000 in connection with the issuance of BlackRock Muni Intermediate Duration Fund, Inc.'s Preferred Stock. For the year ended May 31, 2007, each Fund reimbursed FAM and/or the Manager for certain accounting services. The reimbursements were as follows: For the Period For the Period June 1, 2006 to September 30, 2006 September 29, 2006 to May 31, 2007 Reimbursement Reimbursement to FAM to the Manager BlackRock Muni Intermediate Duration Fund, Inc. $6,970 $11,560 BlackRock Muni New York Intermediate Duration Fund, Inc. $ 722 $ 1,852 Prior to September 29, 2006, certain officers and/or directors of the Funds were officers and/or directors of FAM, MLIM, PSI, FAMD, and/or Merrill Lynch. Commencing September 29, 2006, certain officers and/or directors of the Funds are officers and/or directors of BlackRock, Inc. or its affiliates. ANNUAL REPORTS MAY 31, 2007 Notes to Financial Statements (continued) 3. Investments: Purchases and sales of investments, excluding short-term securities, for the year ended May 31, 2007 were as follows: BlackRock BlackRock Muni Muni New York Intermediate Intermediate Duration Duration Fund, Inc. Fund, Inc. Total Purchases $120,162,063 $28,985,480 Total Sales $110,010,961 $27,026,410 4. Stock Transactions: Each Fund is authorized to issue 200,000,000 shares of stock, including Preferred Stock, par value $.10 per share, all of which were initially classified as Common Stock. The Board of Directors is authorized, however, to reclassify any unissued shares of common stock without approval of the holders of Common Stock. Preferred Stock Auction Market Preferred Stock are redeemable shares of Preferred Stock of the Funds, with a par value of $.10 per share and a liquidation preference of $25,000 per share plus accrued and unpaid dividends that entitle their holders to receive cash dividends at an annual rate that may vary for the successive dividend periods. The yields in effect at May 31, 2007 were as follows: BlackRock BlackRock Muni Muni New York Intermediate Intermediate Duration Duration Fund, Inc. Fund, Inc. Series M7 3.75% -- Series T7 3.70% -- Series W7 3.82% -- Series TH7 3.75% -- Series F7 3.78% 3.62% Series TH28 3.60% -- BlackRock Muni Intermediate Duration Fund, Inc. Shares issued and outstanding during the year ended May 31, 2007 remained constant and during the year ended May 31, 2006 increased by 1,400 from the issuance of an additional series of Preferred Stock. BlackRock Muni New York Intermediate Duration Fund, Inc. Shares issued and outstanding during the years ended May 31, 2007 and May 31, 2006 remained constant. Each Fund pays commissions to certain broker-dealers at the end of each auction at an annual rate ranging from .25% to .375%, calculated on the proceeds of each auction. For the year ended May 31, 2007, MLPF&S earned $550,534 relating to BlackRock Muni Intermediate Duration Fund, Inc. and $61,173 relating to BlackRock Muni New York Intermediate Duration Fund, Inc., as commissions. 5. Distributions to Shareholders: On July 2, 2007, each Fund paid a tax-exempt income dividend to holders of Common Stock to shareholders of record on June 15, 2007. The amounts of the tax-exempt income dividends per share was as follows: Per Share Amount BlackRock Muni Intermediate Duration Fund, Inc. $.061000 BlackRock Muni New York Intermediate Duration Fund, Inc. $.053000 BlackRock Muni Intermediate Duration Fund, Inc. The tax character of distributions paid during the fiscal years ended May 31, 2007 and May 31, 2006 was as follows: 5/31/2007 5/31/2006 Distributions paid from: Tax-exempt income $ 38,760,689 $ 39,996,579 Ordinary income 4,118,763 1,319,480 Net long-term capital gains 1,853,318 8,792,287 --------------- --------------- Total distributions $ 44,732,770 $ 50,108,346 =============== =============== As of May 31, 2007, the components of accumulated earnings on a tax basis were as follows: Undistributed tax-exempt income--net $ 4,019,870 Undistributed long-term capital gains--net -- --------------- Total undistributed earnings--net 4,019,870 Capital loss carryforward (318,382)* Unrealized gains--net 30,021,553** --------------- Total accumulated earnings--net $ 33,723,041 =============== * On May 31, 2007, the Fund had a net capital loss carryforward of $318,382, all of which expires in 2015. This amount will be available to offset like amounts of any future taxable gains. ** The difference between book-basis and tax-basis net unrealized gains is attributable primarily to the tax deferral of losses on wash sales, the difference between book and tax amortization methods for premiums and discounts on fixed income securities, the realization for tax purposes of unrealized gains (losses) on certain futures contracts and the differences between book and tax treatment of residual interests in tender option bonds. ANNUAL REPORTS MAY 31, 2007 Notes to Financial Statements (concluded) BlackRock Muni New York Intermediate Duration Fund, Inc. The tax character of distributions paid during the fiscal years ended May 31, 2007 and May 31, 2006 was as follows: 5/31/2007 5/31/2006 Distributions paid from: Tax-exempt income $ 3,747,217 $ 3,723,892 --------------- --------------- Total distributions $ 3,747,217 $ 3,723,892 =============== =============== As of May 31, 2007, the components of accumulated earnings on a tax basis were as follows: Undistributed tax-exempt income--net $ 316,210 Undistributed long-term capital gains--net -- --------------- Total undistributed earnings--net 316,210 Capital loss carryforward (134,161)* Unrealized gains--net 2,889,222** --------------- Total accumulated earnings--net $ 3,071,271 =============== * On May 31, 2007, the Fund had a net capital loss carryforward of $134,161, all of which expires in 2013. This amount will be available to offset like amounts of any future taxable gains. ** The difference between book-basis and tax-basis net unrealized gains is attributable primarily to the difference between book and tax amortization methods for premiums and discounts on fixed income securities. 6. Restatement Information: Subsequent to the initial issuance of its May 31, 2006 financial statements, BlackRock Muni Intermediate Duration Fund, Inc. determined that the criteria for sale accounting in FAS 140 had not been met for certain transfers of municipal bonds, and that these transfers should have been accounted for as secured borrowings rather than as sales. As a result, certain financial highlights for the year ended May 31, 2005 have been restated to give effect to recording the transfers of the municipal bonds as secured borrowings, including recording interest on the bonds as interest income and interest on the secured borrowings as interest expense. BlackRock Muni Intermediate Duration Fund, Inc. Financial Highlights For the Year Ended May 31, 2005 2005 Previously Reported Restated Total expenses, net of waiver*** .84% .85% Portfolio turnover 54.55% 54% *** Do not reflect the effect of dividends to Preferred Stock shareholders. ANNUAL REPORTS MAY 31, 2007 Report of Independent Registered Public Accounting Firm To the Shareholders and Board of Directors of BlackRock Muni Intermediate Duration Fund, Inc.: We have audited the accompanying statement of net assets, including the schedule of investments, of BlackRock Muni Intermediate Duration Fund, Inc. (formerly Muni Intermediate Duration Fund, Inc.) (the "Fund") as of May 31, 2007, and the related statement of operations for the year then ended and the statements of changes in net assets and the financial highlights for each of the two years in the period then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on the financial statements and financial highlights based on our audits. The financial highlights for the year ended May 31, 2005 (before the restatement described in Note 6) were audited by other auditors whose report, dated July 13, 2005, expressed a qualified opinion on the financial highlights because of the errors described in Note 6. The financial highlights for the period August 1, 2003 (commencement of operations) to May 31, 2004 were audited by other auditors whose report, dated July 13, 2005, ex-pressed an unqualified opinion on those financial highlights. We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of May 31, 2007, by correspondence with the custodian and brokers; where replies were not received from brokers, we performed other auditing procedures. We believe that our audit provides a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights of BlackRock Muni Intermediate Duration Fund, Inc. referred to above, present fairly, in all material respects, its financial position as of May 31, 2007, the results of its operations for the year then ended and the changes in its net assets and its financial highlights for each of the two years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. We also have audited the adjustments, applied by management, to restate certain financial highlights for the year ended May 31, 2005 to correct the errors described in Note 6. These adjustments are the responsibility of the Fund's management. The audit procedures that we performed with respect to the adjustments included such tests as we considered necessary in the circumstances and were designed to obtain reasonable assurance about whether the adjustments are appropriate and have been properly applied, in all material respects, to the restated financial highlights for the year ended May 31, 2005. We did not perform any audit procedures designed to assess whether any additional adjustments to such financial highlights might be necessary in order for such financial highlights to be presented in conformity with generally accepted accounting principles. In our opinion, the adjustments to the financial highlights for the year ended May 31, 2005 described in Note 6 are appropriate and have been properly applied, in all material respects. However, we were not engaged to audit, review, or apply any procedures to such financial highlights other than with respect to the adjustments described in Note 6 and, accordingly, we do not express an opinion or any other form of assurance on such financial highlights. Deloitte & Touche LLP Princeton, New Jersey July 20, 2007 ANNUAL REPORTS MAY 31, 2007 Report of Independent Registered Public Accounting Firm To the Shareholders and Board of Directors of BlackRock Muni New York Intermediate Duration Fund, Inc.: We have audited the accompanying statement of net assets, including the schedule of investments, of BlackRock Muni New York Intermediate Duration Fund, Inc. (formerly Muni New York Intermediate Duration Fund, Inc.) (the "Fund") as of May 31, 2007, and the related statement of operations, the statement of changes in net assets, and the financial highlights for the year then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on the financial statements and financial highlights based on our audit. The statement of changes in net assets for the year ended May 31, 2006 and the financial highlights for each of the two years in the period then ended and for the period August 1, 2003 (commencement of operations) to May 31, 2004 were audited by other auditors whose report, dated July 14, 2006, expressed an unqualified opinion on that financial statement and financial highlights. We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of May 31, 2007, by correspondence with the custodian and brokers; where replies were not received from brokers, we performed other auditing procedures. We believe that our audit provides a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above, present fairly, in all material respects, the financial position of BlackRock Muni New York Intermediate Duration Fund, Inc. as of May 31, 2007, the results of its operations, the changes in its net assets, and its financial highlights for the year then ended, in conformity with accounting principles generally accepted in the United States of America. Deloitte & Touche LLP Princeton, New Jersey July 20, 2007 Fund Certifications In September 2006, BlackRock Muni Intermediate Duration Fund, Inc. and BlackRock Muni New York Intermediate Duration Fund, Inc. filed their Chief Executive Officer Certifications with the New York Stock Exchange pursuant to Section 303A.12(a) of the New York Stock Exchange Corporate Governance Listing Standards. The Funds' Chief Executive Officer and Chief Financial Officer Certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 were filed with the Funds' Forms N-CSR and are available on the Securities and Exchange Commission's Web site at http://www.sec.gov. ANNUAL REPORTS MAY 31, 2007 Automatic Dividend Reinvestment Plan How the Plan Works--The Funds offer a Dividend Reinvestment Plan (the "Plan") under which income and capital gains dividends paid by each Fund are automatically reinvested in additional shares of Common Stock of each Fund. The Plan is administered on behalf of the shareholders by Computershare Trust Company, N.A. (the "Plan Agent"). Under the Plan, whenever the Funds declare a dividend, participants in the Plan will receive the equivalent in shares of Common Stock of each Fund. The Plan Agent will acquire the shares for the participant's account either (i) through receipt of additional unissued but authorized shares of each Fund ("newly issued shares") or (ii) by purchase of outstanding shares of Common Stock on the open market on the New York Stock Exchange or elsewhere. If, on the dividend payment date, each Fund's net asset value per share is equal to or less than the market price per share plus estimated brokerage commissions (a condition often referred to as a "market premium"), the Plan Agent will invest the dividend amount in newly issued shares. If the Funds' net asset value per share is greater than the market price per share (a condition often referred to as a "market discount"), the Plan Agent will invest the dividend amount by purchasing on the open market additional shares. If the Plan Agent is unable to invest the full dividend amount in open market purchases, or if the market discount shifts to a market premium during the purchase period, the Plan Agent will invest any uninvested portion in newly issued shares. The shares acquired are credited to each shareholder's account. The amount credited is determined by dividing the dollar amount of the dividend by either (i) when the shares are newly issued, the net asset value per share on the date the shares are issued or (ii) when shares are purchased in the open market, the average purchase price per share. Participation in the Plan--Participation in the Plan is automatic, that is, a shareholder is automatically enrolled in the Plan when he or she purchases shares of Common Stock of the Funds unless the shareholder specifically elects not to participate in the Plan. Shareholders who elect not to participate will receive all dividend distributions in cash. Shareholders who do not wish to participate in the Plan must advise the Plan Agent in writing (at the address set forth below) that they elect not to participate in the Plan. Participation in the Plan is completely voluntary and may be terminated or resumed at any time without penalty by writing to the Plan Agent. Benefits of the Plan--The Plan provides an easy, convenient way for shareholders to make additional, regular investments in the Funds. The Plan promotes a long-term strategy of investing at a lower cost. All shares acquired pursuant to the Plan receive voting rights. In addition, if the market price plus commissions of each Fund's shares is above the net asset value, participants in the Plan will receive shares of the Fund for less than they could otherwise purchase them and with a cash value greater than the value of any cash distribution they would have received. However, there may not be enough shares available in the market to make distributions in shares at prices below the net asset value. Also, since each Fund does not redeem shares, the price on resale may be more or less than the net asset value. Plan Fees--There are no enrollment fees or brokerage fees for participating in the Plan. The Plan Agent's service fees for handling the reinvestment of distributions are paid for by the Fund. However, brokerage commissions may be incurred when the Fund purchases shares on the open market and shareholders will pay a pro rata share of any such commissions. Tax Implications--The automatic reinvestment of dividends and distributions will not relieve participants of any federal, state or local income tax that may be payable (or required to be withheld) on such dividends. Therefore, income and capital gains may still be realized even though shareholders do not receive cash. Contact Information--All correspondence concerning the Plan, including any questions about the Plan, should be directed to the Plan Agent at Computershare Trust Company, N.A., P.O. Box 43010, Providence, RI 02940-3010, Telephone: 800-426-5523. ANNUAL REPORTS MAY 31, 2007 Officers and Directors Number of Funds and Portfolios in Other Public Position(s) Length of Fund Complex Directorships Held with Time Overseen by Held by Name, Address & Age Funds Served Principal Occupation(s) During Past 5 Years Director Director Interested Director Robert C. Doll, Jr.* Fund 2005 to Vice Chairman and Director of BlackRock, Inc., 122 Funds None P.O. Box 9011 President present Global Chief Investment Officer for Equities, 168 Portfolios Princeton, and Chairman of the BlackRock Retail Operating NJ 08543-9011 Director Committee, and member of the BlackRock Executive Age: 52 Committee since 2006; President of the funds advised by Merrill Lynch Investment Managers, L.P. ("MLIM") and its affiliates ("MLIM/FAM-advised funds") from 2005 to 2006 and Chief Investment Officer thereof from 2001 to 2006; President of MLIM and Fund Asset Management, L.P. ("FAM") from 2001 to 2006; Co-Head (Americas Region) thereof from 2000 to 2001 and Senior Vice President from 1999 to 2001; President and Director of Princeton Services, Inc. ("Princeton Services") and President of Princeton Administrators, L.P. ("Princeton Administrators") from 2001 to 2006; Chief Investment Officer of OppenheimerFunds, Inc. in 1999 and Executive Vice President thereof from 1991 to 1999. * Mr. Doll is a director, trustee or member of an advisory board of certain other investment companies for which BlackRock Advisors, LLC and its affiliates act as investment adviser. Mr. Doll is an "interested person," as defined in the Investment Company Act, of the Fund based on his positions with BlackRock, Inc. and its affiliates. Directors serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. As Fund President, Mr. Doll serves at the pleasure of the respective Board of Directors. ANNUAL REPORTS MAY 31, 2007 Officers and Directors (continued) Number of Funds and Portfolios in Other Public Position(s) Length of Fund Complex Directorships Held with Time Overseen by Held by Name, Address & Age Funds Served Principal Occupation(s) During Past 5 Years Director Director Independent Directors* Donald W. Burton Director 2003 to Managing General Partner of The Burton 21 Funds Knology, Inc. P.O. Box 9095 present Partnership, Limited Partnership (an investment 38 Portfolios (telecommuni- Princeton, partnership) since 1979; Managing General cations); NJ 08543-9095 Partner of The South Atlantic Venture Funds since Symbion, Inc. Age: 63 1983; Member of the Investment Advisory Council (healthcare); of the Florida State Board of Administration and Capital since 2001. Southwest (financial) John Francis O'Brien Director 2004 to President and Chief Executive Officer of 21 Funds Cabot P.O. Box 9095 present Allmerica Financial Corporation (financial 38 Portfolios Corporation Princeton, services holding company) from 1995 to 2002 and (chemicals); NJ 08543-9095 Director from 1995 to 2003; President of LKQ Corporation Age: 64 Allmerica Investment Management Co., Inc. (auto parts (investment adviser) from 1989 to 2002, Director manufacturing); from 1989 to 2002 and Chairman of the Board from and TJX 1989 to 1990; President, Chief Executive Officer Companies, Inc. and Director of First Allmerica Financial Life (retailer) Insurance Company from 1989 to 2002 and Director of various other Allmerica Financial companies until 2002; Director from 1989 to 2006, Member of the Governance Nominating Committee from 2004 to 2006, Member of the Compensation Committee from 1989 to 2006 and Member of the Audit Committee from 1990 to 2004 of ABIOMED; Director, Member of the Governance and Nomination Committee and Member of the Audit Committee of Cabot Corporation since 1990; Director and Member of the Audit Committee and Compensation Committee of LKQ Corporation since 2003; Lead Director of TJX Companies, Inc. since 1996; Trustee of the Woods Hole Oceanographic Institute since 2003. Director, Ameresco, Inc. since 2006. Director, Boston Lyric Opera since 2002. David H. Walsh Director 2003 to Director, Ruckleshaus Institute and Haub School 21 Funds None P.O. Box 9095 present of Natural Resources at the University of 38 Portfolios Princeton, Wyoming since 2006; Consultant with Putnam NJ 08543-9095 Investments from 1993 to 2003, and employed in Age: 65 various capacities therewith from 1973 to 1992; Director, Massachusetts Audubon Society from 1990 to 1997; Director, The National Audubon Society from 1998 to 2005; Director, The American Museum of Fly Fishing since 1997. Fred G. Weiss** Director 2003 to Managing Director of FGW Associates since 21 Funds Watson P.O. Box 9095 present 1997; Vice President, Planning, Investment and 38 Portfolios Pharmaceu- Princeton, Development of Warner Lambert Co. from 1979 ticals, Inc. NJ 08543-9095 to 1997; Director of the Michael J. Fox Foundation (pharmaceu- Age: 65 for Parkinson's Research since 2000; Director of tical BTG International Plc (a global technology company) commercialization company) since 2001. * Directors serve until their resignation, removal or death, or until December 31 of the year in which they turn 72. ** Chairman of the Board of Directors and the Audit Committee. ANNUAL REPORTS MAY 31, 2007 Officers and Directors (concluded) Position(s) Length of Held with Time Name, Address & Age Funds Served Principal Occupation(s) During Past 5 Years Fund Officers* Donald C. Burke Vice 2003 to Managing Director of BlackRock, Inc. since 2006; Managing Director of Merrill P.O. Box 9011 President present Lynch Investment Managers, L.P. ("MLIM") and Fund Asset Management, L.P. Princeton, and ("FAM") in 2006; First Vice President of MLIM and FAM from 1997 to 2005 and NJ 08543-9011 Treasurer Treasurer thereof from 1999 to 2006; Vice President of MLIM and FAM from 1990 Age: 46 to 1997. Karen Clark Fund Chief 2007 to Managing Director of BlackRock, Inc. and Chief Compliance Officer of certain P.O. Box 9011 Compliance present BlackRock-advised funds since 2007; Director of BlackRock, Inc. from 2005 to Princeton, Officer 2007; Principal and Senior Compliance Officer, State Street Global Advisors, NJ 08543-9011 from 2001 to 2005; Principal Consultant, PricewaterhouseCoopers, LLP from 1998 Age: 42 to 2001; and Branch Chief, Division of Investment Management and Office of Compliance Inspections and Examinations, U.S. Securities and Exchange Commission, from 1993 to 1998. Alice A. Pellegrino Secretary 2004 to Director of BlackRock, Inc. since 2006; Director (Legal Advisory) of MLIM from P.O. Box 9011 present 2002 to 2006; Vice President of MLIM from 1999 to 2002; Attorney associated Princeton, with MLIM from 1997 to 1999; Secretary of MLIM, FAM, FAM Distributors, Inc. NJ 08543-9011 and Princeton Services from 2004 to 2006. Age: 47 * Officers of the Funds serve at the pleasure of the respective Board of Directors. Custodian State Street Bank and Trust Company P.O. Box 351 Boston, MA 02101 Transfer Agents Common Stock: Preferred Stock: Computershare Trust The Bank of New York Company, N.A. 101 Barclay Street - 7 West P.O. Box 43010 New York, NY 10286 Providence, RI 02940-3010 800-426-5523 Investment Objectives NYSE Symbol BlackRock Muni Intermediate Duration Fund, Inc. seeks to provide MUI shareholders with high current income exempt from federal income taxes by investing primarily in a portfolio of municipal obligations, the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal income taxes. NYSE Symbol BlackRock Muni New York Intermediate Duration Fund, Inc. seeks to MNE provide shareholders with high current income exempt from federal income taxes and New York State and New York City personal income taxes by investing primarily in a portfolio of municipal obligations, the interest on which, in the opinion of bond counsel to the issuer, is exempt from federal income taxes and New York State and New York City personal income taxes. ANNUAL REPORTS MAY 31, 2007 Change in Fund's Independent Registered Public Accounting Firm On August 28, 2006, Ernst & Young LLP ("E&Y") resigned as the Independent Registered Public Accounting Firm of BlackRock Muni Intermediate Duration Fund, Inc. and BlackRock Muni New York Intermediate Duration Fund, Inc. (the "Funds") because it was determined that E&Y is not independent of BlackRock, Inc. and the Funds. E&Y's reports on the financial statements of the Funds for the prior two fiscal years did not contain an adverse opinion or a disclaimer of opinion and except for the restatement information contained in Note 6 to the Financial Statements, were not qualified or modified as to uncertainty, audit scope or accounting principles. In connection with its audits for the two most recent fiscal years and through August 28, 2006 (1) there were no disagreements with E&Y on any matter of accounting principle or practice, financial statement disclosure or auditing scope or procedure, whereby such disagreements, if not resolved to the satisfaction of E&Y, would have caused them to make reference to the subject matter of the disagreements in connection with their report on the financial statements for such years; and (2) there have been no reportable events (as defined in item 304(a)(1)(v) of Regulation S-K). The Audit Committee of the Funds' Board of Directors approved the engagement of Deloitte & Touche llp as the Funds' Independent Registered Public Accounting Firm for the fiscal year ended May 31, 2007. BlackRock Privacy Principles BlackRock is committed to maintaining the privacy of its current and former fund investors and individual clients (collectively, "Clients") and to safeguarding their non-public personal information. The following information is provided to help you understand what personal information BlackRock collects, how we protect that information and why in certain cases we share such information with select parties. If you are located in a jurisdiction where specific laws, rules or regulations require BlackRock to provide you with additional or different privacy-related rights beyond what is set forth below, then BlackRock will comply with those specific laws, rules or regulations. BlackRock obtains or verifies personal non-public information from and about you from different sources, including the following: (i) information we receive from you or, if applicable, your financial intermediary, on applications, forms or other documents; (ii) information about your transactions with us, our affiliates, or others; (iii) information we receive from a consumer reporting agency; and (iv) from visits to our Web sites. BlackRock does not sell or disclose to non-affiliated third parties any non- public personal information about its Clients, except as permitted by law or as is necessary to respond to regulatory requests or to service Client accounts. These non-affiliated third parties are required to protect the confidentiality and security of this information and to use it only for its intended purpose. We may share information with our affiliates to service your account or to provide you with information about other BlackRock products or services that may be of interest to you. In addition, BlackRock restricts access to non- public personal information about its Clients to those BlackRock employees with a legitimate business need for the information. BlackRock maintains physical, electronic and procedural safeguards that are designed to protect the non- public personal information of its Clients, including procedures relating to the proper storage and disposal of such information. ANNUAL REPORTS MAY 31, 2007 Swap Agreements The Funds may invest in swap agreements, which are over-the-counter contracts in which one party agrees to make periodic payments based on the change in market value of a specified bond, basket of bonds, or index in return for periodic payments based on a fixed or variable interest rate or the change in market value of a different bond, basket of bonds or index. Swap agreements may be used to obtain exposure to a bond or market without owning or taking physical custody of securities. Swap agreements involve the risk that the party with whom each Fund has entered into the swap will default on its obligation to pay the Funds and the risk that the Funds will not be able to meet their obligations to pay the other party to the agreement. Availability of Quarterly Schedule of Investments The Funds file their complete schedules of portfolio holdings with the Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. The Funds' Forms N-Q are available on the SEC's Web site at http://www.sec.gov. The Funds' Forms N-Q may also be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. Electronic Delivery Electronic copies of most financial reports and prospectuses are available on the Funds' Web site. Shareholders can sign up for e-mail notifications of quarterly statements, annual and semi-annual reports and prospectuses by enrolling in the Funds' electronic delivery program. Shareholders Who Hold Accounts with Investment Advisers, Banks or Brokerages: Please contact your financial advisor to enroll. Please note that not all investment advisers, banks or brokerages may offer this service. ANNUAL REPORTS MAY 31, 2007 Item 2 - Code of Ethics - The registrant has adopted a code of ethics, as of the end of the period covered by this report, that applies to the registrant's principal executive officer, principal financial officer and principal accounting officer, or persons performing similar functions. A copy of the code of ethics is available without charge at www.blackrock.com. Item 3 - Audit Committee Financial Expert - The registrant's board of directors has determined that (i) the registrant has the following audit committee financial experts serving on its audit committee and (ii) each audit committee financial expert is independent: (1) Donald W. Burton, (2) John F. O'Brien, (3) David H. Walsh and (4) Fred G. Weiss. Item 4 - Principal Accountant Fees and Services Note: The Fund changed auditors effective August, 28, 2006. Prior to that date, Ernst & Young LLP provided services as the Fund's independent registered public accountant. (a) Audit Fees - Fiscal Year Ended May 31, 2007 - $32,500 Fiscal Year Ended May 31, 2006 - $54,250 (b) Audit-Related Fees - Fiscal Year Ended May 31, 2007 - $3,500 Fiscal Year Ended May 31, 2006 - $3,500 (c) Tax Fees - Fiscal Year Ended May 31, 2007 - $6,100 Fiscal Year Ended May 31, 2006 - $6,000 The nature of the services include tax compliance, tax advice and tax planning. (d) All Other Fees - Fiscal Year Ended May 31, 2007 - $0 Fiscal Year Ended May 31, 2006 - $0 (e)(1) The registrant's audit committee (the "Committee") has adopted policies and procedures with regard to the pre-approval of services. Audit, audit-related and tax compliance services provided to the registrant on an annual basis require specific pre-approval by the Committee. The Committee also must approve other non-audit services provided to the registrant and those non-audit services provided to the registrant's affiliated service providers that relate directly to the operations and the financial reporting of the registrant. Certain of these non-audit services that the Committee believes are a) consistent with the SEC's auditor independence rules and b) routine and recurring services that will not impair the independence of the independent accountants may be approved by the Committee without consideration on a specific case-by-case basis ("general pre-approval"). However, such services will only be deemed pre-approved provided that any individual project does not exceed $5,000 attributable to the registrant or $50,000 for all of the registrants the Committee oversees. Any proposed services exceeding the pre-approved cost levels will require specific pre- approval by the Committee, as will any other services not subject to general pre-approval (e.g., unanticipated but permissible services). The Committee is informed of each service approved subject to general pre-approval at the next regularly scheduled in-person board meeting. (e)(2) 0% (f) Not Applicable (g) Fiscal Year Ended May 31, 2007 - $2,988,917 Fiscal Year Ended May 31, 2006 - $3,124,717 (h) The registrant's audit committee has considered and determined that the provision of non-audit services that were rendered to the registrant's investment adviser and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Regulation S-X Rule 2-01(c)(7)(ii) - $1,739,500, 0% Item 5 - Audit Committee of Listed Registrants - The following individuals are members of the registrant's separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)): Donald W. Burton John F. O'Brien David H. Walsh Fred G. Weiss Item 6 - Schedule of Investments - The registrant's Schedule of Investments is included as part of the Report to Stockholders filed under Item 1 of this form. Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies - Proxy Voting Policies and Procedures Applicable to the Fund ----------------------------------------------------------- Each Fund's Board of Directors has delegated to the Manager authority to vote all proxies relating to the Fund's portfolio securities. The Manager has adopted policies and procedures (the "Proxy Voting Procedures") with respect to the voting of proxies related to the portfolio securities held in the account of one or more of its clients, including a Fund. Pursuant to these Proxy Voting Procedures, the Manager's primary objective when voting proxies is to make proxy voting decisions solely in the best interests of each Fund and its shareholders, and to act in a manner that the Manager believes is most likely to enhance the economic value of the securities held by the Fund. The Proxy Voting Procedures are designed to ensure that the Manager considers the interests of its clients, including each Fund, and not the interests of the Manager, when voting proxies and that real (or perceived) material conflicts that may arise between the Manager's interest and those of the Manager's clients are properly addressed and resolved. In order to implement the Proxy Voting Procedures, the Manager has formed a Proxy Voting Committee (the "Committee"). The Committee, which is a subcommittee of the Manager's Equity Investment Policy Oversight Committee ("EIPOC"), is comprised of a senior member of the Manager's equity management group who is also a member of EIPOC, one or more other senior investment professionals appointed by EIPOC, portfolio managers and investment analysts appointed by EIPOC and any other personnel EIPOC deems appropriate. The Committee will also include two non-voting representatives from the Manager's Legal Department appointed by the Manager's General Counsel. The Committee's membership shall be limited to full-time employees of the Manager. No person with any investment banking, trading, retail brokerage or research responsibilities for the Manager's affiliates may serve as a member of the Committee or participate in its decision making (except to the extent such person is asked by the Committee to present information to the Committee on the same basis as other interested knowledgeable parties not affiliated with the Manager might be asked to do so). The Committee determines how to vote the proxies of all clients, including a Fund, that have delegated proxy voting authority to the Manager and seeks to ensure that all votes are consistent with the best interests of those clients and are free from unwarranted and inappropriate influences. The Committee establishes general proxy voting policies for the Manager and is responsible for determining how those policies are applied to specific proxy votes, in light of each issuer's unique structure, management, strategic options and, in certain circumstances, probable economic and other anticipated consequences of alternate actions. In so doing, the Committee may determine to vote a particular proxy in a manner contrary to its generally stated policies. In addition, the Committee will be responsible for ensuring that all reporting and recordkeeping requirements related to proxy voting are fulfilled. The Committee may determine that the subject matter of a recurring proxy issue is not suitable for general voting policies and requires a case-by-case determination. In such cases, the Committee may elect not to adopt a specific voting policy applicable to that issue. The Manager believes that certain proxy voting issues require investment analysis - such as approval of mergers and other significant corporate transactions - akin to investment decisions, and are, therefore, not suitable for general guidelines. The Committee may elect to adopt a common position for the Manager on certain proxy votes that are akin to investment decisions, or determine to permit the portfolio manager to make individual decisions on how best to maximize economic value for a Fund (similar to normal buy/sell investment decisions made by such portfolio managers). While it is expected that the Manager will generally seek to vote proxies over which the Manager exercises voting authority in a uniform manner for all the Manager's clients, the Committee, in conjunction with a Fund's portfolio manager, may determine that the Fund's specific circumstances require that its proxies be voted differently. To assist the Manager in voting proxies, the Committee has retained Institutional Shareholder Services ("ISS"). ISS is an independent adviser that specializes in providing a variety of fiduciary-level proxy-related services to institutional investment managers, plan sponsors, custodians, consultants, and other institutional investors. The services provided to the Manager by ISS include in- depth research, voting recommendations (although the Manager is not obligated to follow such recommendations), vote execution, and recordkeeping. ISS will also assist the Fund in fulfilling its reporting and recordkeeping obligations under the Investment Company Act. The Manager's Proxy Voting Procedures also address special circumstances that can arise in connection with proxy voting. For instance, under the Proxy Voting Procedures, the Manager generally will not seek to vote proxies related to portfolio securities that are on loan, although it may do so under certain circumstances. In addition, the Manager will vote proxies related to securities of foreign issuers only on a best efforts basis and may elect not to vote at all in certain countries where the Committee determines that the costs associated with voting generally outweigh the benefits. The Committee may at any time override these general policies if it determines that such action is in the best interests of a Fund. From time to time, the Manager may be required to vote proxies in respect of an issuer where an affiliate of the Manager (each, an "Affiliate"), or a money management or other client of the Manager, including investment companies for which the Manager provides investment advisory, administrative and/or other services (each, a "Client"), is involved. The Proxy Voting Procedures and the Manager's adherence to those procedures are designed to address such conflicts of interest. The Committee intends to strictly adhere to the Proxy Voting Procedures in all proxy matters, including matters involving Affiliates and Clients. If, however, an issue representing a non-routine matter that is material to an Affiliate or a widely known Client is involved such that the Committee does not reasonably believe it is able to follow its guidelines (or if the particular proxy matter is not addressed by the guidelines) and vote impartially, the Committee may, in its discretion for the purposes of ensuring that an independent determination is reached, retain an independent fiduciary to advise the Committee on how to vote or to cast votes on behalf of the Manager's clients. In the event that the Committee determines not to retain an independent fiduciary, or it does not follow the advice of such an independent fiduciary, the Committee may pass the voting power to a subcommittee, appointed by EIPOC (with advice from the Secretary of the Committee), consisting solely of Committee members selected by EIPOC. EIPOC shall appoint to the subcommittee, where appropriate, only persons whose job responsibilities do not include contact with the Client and whose job evaluations would not be affected by the Manager's relationship with the Client (or failure to retain such relationship). The subcommittee shall determine whether and how to vote all proxies on behalf of the Manager's clients or, if the proxy matter is, in their judgment, akin to an investment decision, to defer to the applicable portfolio managers, provided that, if the subcommittee determines to alter the Manager's normal voting guidelines or, on matters where the Manager's policy is case-by- case, does not follow the voting recommendation of any proxy voting service or other independent fiduciary that may be retained to provide research or advice to the Manager on that matter, no proxies relating to the Client may be voted unless the Secretary, or in the Secretary's absence, the Assistant Secretary of the Committee concurs that the subcommittee's determination is consistent with the Manager's fiduciary duties. In addition to the general principles outlined above, the Manager has adopted voting guidelines with respect to certain recurring proxy issues that are not expected to involve unusual circumstances. These policies are guidelines only, and the Manager may elect to vote differently from the recommendation set forth in a voting guideline if the Committee determines that it is in a Fund's best interest to do so. In addition, the guidelines may be reviewed at any time upon the request of a Committee member and may be amended or deleted upon the vote of a majority of Committee members present at a Committee meeting at which there is a quorum. The Manager has adopted specific voting guidelines with respect to the following proxy issues: * Proposals related to the composition of the board of directors of issuers other than investment companies. As a general matter, the Committee believes that a company's board of directors (rather than shareholders) is most likely to have access to important, nonpublic information regarding a company's business and prospects, and is, therefore, best-positioned to set corporate policy and oversee management. The Committee, therefore, believes that the foundation of good corporate governance is the election of qualified, independent corporate directors who are likely to diligently represent the interests of shareholders and oversee management of the corporation in a manner that will seek to maximize shareholder value over time. In individual cases, the Committee may look at a nominee's number of other directorships, history of representing shareholder interests as a director of other companies or other factors, to the extent the Committee deems relevant. * Proposals related to the selection of an issuer's independent auditors. As a general matter, the Committee believes that corporate auditors have a responsibility to represent the interests of shareholders and provide an independent view on the propriety of financial reporting decisions of corporate management. While the Committee will generally defer to a corporation's choice of auditor, in individual cases, the Committee may look at an auditors' history of representing shareholder interests as auditor of other companies, to the extent the Committee deems relevant. * Proposals related to management compensation and employee benefits. As a general matter, the Committee favors disclosure of an issuer's compensation and benefit policies and opposes excessive compensation, but believes that compensation matters are normally best determined by an issuer's board of directors, rather than shareholders. Proposals to "micro-manage" an issuer's compensation practices or to set arbitrary restrictions on compensation or benefits will, therefore, generally not be supported. * Proposals related to requests, principally from management, for approval of amendments that would alter an issuer's capital structure. As a general matter, the Committee will support requests that enhance the rights of common shareholders and oppose requests that appear to be unreasonably dilutive. * Proposals related to requests for approval of amendments to an issuer's charter or by-laws. As a general matter, the Committee opposes poison pill provisions. * Routine proposals related to requests regarding the formalities of corporate meetings. * Proposals related to proxy issues associated solely with holdings of investment company shares. As with other types of companies, the Committee believes that a fund's board of directors (rather than its shareholders) is best positioned to set fund policy and oversee management. However, the Committee opposes granting boards of directors authority over certain matters, such as changes to a fund's investment objective, which the Investment Company Act envisions will be approved directly by shareholders. * Proposals related to limiting corporate conduct in some manner that relates to the shareholder's environmental or social concerns. The Committee generally believes that annual shareholder meetings are inappropriate forums for discussion of larger social issues, and opposes shareholder resolutions "micromanaging" corporate conduct or requesting release of information that would not help a shareholder evaluate an investment in the corporation as an economic matter. While the Committee is generally supportive of proposals to require corporate disclosure of matters that seem relevant and material to the economic interests of shareholders, the Committee is generally not supportive of proposals to require disclosure of corporate matters for other purposes. Information about how a Fund voted proxies relating to securities held in the Fund's portfolio during the most recent 12 month period ended June 30 is available without charge (1) at www.blackrock.com and (2) on the Commission's web site at http://www.sec.gov. Item 8 - Portfolio Managers of Closed-End Management Investment Companies - as of May 31, 2007. (a)(1) BlackRock Muni Intermediate Duration Fund, Inc. is managed by a team of investment professionals comprised of Theodore R. Jaeckel, Jr., CFA, Managing Director at BlackRock, and Walter O'Connor, Managing Director at BlackRock. Each is a member of BlackRock's municipal tax-exempt management group. Mr. Jaeckel and Mr. O'Connor are responsible for setting the Fund's overall investment strategy and overseeing the management of the Fund. Mr. O'Connor is the Fund's lead portfolio manager and is responsible for the day-to-day management of the Fund's portfolio and the selection of its investments. Mr. Jaeckel has been a member of the Fund's management team since 2006 and Mr. O'Connor has been the Fund's portfolio manager since 2006. Mr. Jaeckel joined BlackRock in 2006. Prior to joining BlackRock, he was a Managing Director (Municipal Tax-Exempt Fund Management) of Merrill Lynch Investment Managers, L.P. ("MLIM") from 2005 to 2006 and a Director of MLIM from 1997 to 2005. He has been a portfolio manager with BlackRock or MLIM since 1991. Mr. O'Connor joined BlackRock in 2006. Prior to joining BlackRock, he was a Managing Director (Municipal Tax-Exempt Fund Management) of MLIM from 2003 to 2006 and was a Director of MLIM from 1997 to 2002. He has been a portfolio manager with BlackRock or MLIM since 1991. (a)(2) As of May 31, 2007: (iii) Number of Other Accounts and (ii) Number of Other Accounts Managed Assets for Which Advisory Fee is and Assets by Account Type Performance-Based Other Other (i) Name of Registered Other Pooled Registered Other Pooled Portfolio Investment Investment Other Investment Investment Other Manager Companies Vehicles Accounts Companies Vehicles Accounts Theodore R. Jaeckel, Jr. 80 0 1 0 0 1 $28,374,334,472 $0 $34,565,220 $0 $0 $34,565,220 Walter O'Connor 80 0 0 0 0 0 $28,374,334,472 $0 $0 $0 $0 $0 (iv) Potential Material Conflicts of Interest BlackRock has built a professional working environment, firm-wide compliance culture and compliance procedures and systems designed to protect against potential incentives that may favor one account over another. BlackRock has adopted policies and procedures that address the allocation of investment opportunities, execution of portfolio transactions, personal trading by employees and other potential conflicts of interest that are designed to ensure that all client accounts are treated equitably over time. Nevertheless, BlackRock furnishes investment management and advisory services to numerous clients in addition to the Fund, and BlackRock may, consistent with applicable law, make investment recommendations to other clients or accounts (including accounts which are hedge funds or have performance or higher fees paid to BlackRock, or in which portfolio managers have a personal interest in the receipt of such fees), which may be the same as or different from those made to the Fund. In addition, BlackRock, its affiliates and any officer, director, stockholder or employee may or may not have an interest in the securities whose purchase and sale BlackRock recommends to the Fund. BlackRock, or any of its affiliates, or any officer, director, stockholder, employee or any member of their families may take different actions than those recommended to the Fund by BlackRock with respect to the same securities. Moreover, BlackRock may refrain from rendering any advice or services concerning securities of companies of which any of BlackRock's (or its affiliates') officers, directors or employees are directors or officers, or companies as to which BlackRock or any of its affiliates or the officers, directors and employees of any of them has any substantial economic interest or possesses material non-public information. Each portfolio manager also may manage accounts whose investment strategies may at times be opposed to the strategy utilized for the Fund. In this connection, it should be noted that certain portfolio managers currently manage certain accounts that are subject to performance fees. In addition, certain portfolio managers assist in managing certain hedge funds and may be entitled to receive a portion of any incentive fees earned on such funds and a portion of such incentive fees may be voluntarily or involuntarily deferred. Additional portfolio managers may in the future manage other such accounts or funds and may be entitled to receive incentive fees. As a fiduciary, BlackRock owes a duty of loyalty to its clients and must treat each client fairly. When BlackRock purchases or sells securities for more than one account, the trades must be allocated in a manner consistent with its fiduciary duties. BlackRock attempts to allocate investments in a fair and equitable manner among client accounts, with no account receiving preferential treatment. To this end, BlackRock has adopted a policy that is intended to ensure that investment opportunities are allocated fairly and equitably among client accounts over time. This policy also seeks to achieve reasonable efficiency in client transactions and provide BlackRock with sufficient flexibility to allocate investments in a manner that is consistent with the particular investment discipline and client base. (a)(3) As of May 31, 2007: Portfolio Manager Compensation The elements of total compensation for portfolio managers on BlackRock's municipal team include a fixed base salary, annual performance-based cash and stock compensation (cash and stock bonus) and other benefits. BlackRock has balanced these components of pay to provide these portfolio managers with a powerful incentive to achieve consistently superior investment performance. By design, compensation levels for these portfolio managers fluctuate--both up and down--with the relative investment performance of the portfolios that they manage. Base compensation. Like that of many asset management firms, base salaries represent a relatively small portion of a portfolio manager's total compensation. This approach serves to enhance the motivational value of the performance-based (and therefore variable) compensation elements of the compensation program. Performance-Based Compensation. BlackRock believes that the best interests of investors are served by recruiting and retaining exceptional asset management talent and managing their compensation within a consistent and disciplined framework that emphasizes pay for performance in the context of an intensely competitive market for talent. To that end, BlackRock and its affiliates portfolio manager incentive compensation is based on a formulaic compensation program. BlackRock's formulaic portfolio manager compensation program includes: investment performance relative to a subset of closed-end, intermediate municipal debt funds over 1-, 3- and 5-year performance periods and a measure of operational efficiency. Portfolio managers are compensated based on the pre-tax performance of the products they manage. If a portfolio manager's tenure is less than 5 years, performance periods will reflect time in position. Portfolio managers are compensated based on products they manage. A discretionary element of portfolio manager compensation may include consideration of: financial results, expense control, profit margins, strategic planning and implementation, quality of client service, market share, corporate reputation, capital allocation, compliance and risk control, leadership, workforce diversity, supervision, technology and innovation. All factors are considered collectively by BlackRock management. Cash Bonus Performance-based compensation is distributed to portfolio managers in a combination of cash and stock. Typically, the cash bonus, when combined with base salary, represents more than 60% of total compensation for portfolio managers. Stock Bonus A portion of the dollar value of the total annual performance- based bonus is paid in restricted shares of BlackRock stock. Paying a portion of annual bonuses in stock puts compensation earned by a portfolio manager for a given year "at risk" based on the company's ability to sustain and improve its performance over future periods. The ultimate value of stock bonuses is dependent on future BlackRock stock price performance. As such, the stock bonus aligns each portfolio manager's financial interests with those of the BlackRock shareholders and encourages a balance between short-term goals and long-term strategic objectives. Management strongly believes that providing a significant portion of competitive performance-based compensation in stock is in the best interests of investors and shareholders. This approach ensures that portfolio managers participate as shareholders in both the "downside risk" and "upside opportunity" of the company's performance. Portfolio managers therefore have a direct incentive to protect BlackRock's reputation for integrity. Other Compensation Programs Portfolio managers who meet relative investment performance and financial management objectives during a performance year are eligible to participate in a deferred cash program. Awards under this program are in the form of deferred cash that may be benchmarked to a menu of BlackRock mutual funds (including their own fund) during a five-year vesting period. The deferred cash program aligns the interests of participating portfolio managers with the investment results of BlackRock products and promotes continuity of successful portfolio management teams. Other Benefits Portfolio managers are also eligible to participate in broad- based plans offered generally to employees of BlackRock and its affiliates, including broad-based retirement, 401(k), health, and other employee benefit plans. (a)(4) Beneficial Ownership of Securities. As of May 31, 2007, neither Mr. Jaeckel nor Mr. O'Connor beneficially owned any stock issued by the Fund. Item 9 - Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers - Not Applicable Item 10 - Submission of Matters to a Vote of Security Holders - The registrant's Nominating Committee will consider nominees to the Board recommended by shareholders when a vacancy becomes available. Shareholders who wish to recommend a nominee should send nominations which include biographical information and set forth the qualifications of the proposed nominee to the registrant's Secretary. There have been no material changes to these procedures. Item 11 - Controls and Procedures 11(a) - The registrant's principal executive and principal financial officers or persons performing similar functions have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act")) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities and Exchange Act of 1934, as amended. 11(b) - There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. Item 12 - Exhibits attached hereto 12(a)(1) - Code of Ethics - See Item 2 12(a)(2) - Certifications - Attached hereto 12(a)(3) - Not Applicable 12(b) - Certifications - Attached hereto Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. BlackRock Muni Intermediate Duration Fund, Inc. By: /s/ Robert C. Doll, Jr. ----------------------- Robert C. Doll, Jr., Chief Executive Officer of BlackRock Muni Intermediate Duration Fund, Inc. Date: July 24, 2007 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By: /s/ Robert C. Doll, Jr. ----------------------- Robert C. Doll, Jr., Chief Executive Officer of BlackRock Muni Intermediate Duration Fund, Inc. Date: July 24, 2007 By: /s/ Donald C. Burke ------------------- Donald C. Burke, Chief Financial Officer of BlackRock Muni Intermediate Duration Fund, Inc. Date: July 24, 2007