BlackRock Muni Intermediate Duration Fund, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED

MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-21348

Name of Fund: BlackRock Muni Intermediate Duration Fund, Inc. (MUI)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: John M. Perlowski, Chief Executive Officer, BlackRock Muni Intermediate Duration Fund, Inc.,
55 East 52nd Street, New York, NY 10055

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 04/30/2013

Date of reporting period: 01/31/2013

Item 1 – Schedule of Investments

Schedule of Investments January 31, 2013 (Unaudited)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

Alabama – 2.7%

      

Birmingham Special Care Facilities Financing Authority, RB, Children’s Hospital (AGC),

      

6.00%, 6/01/34

    $ 4,615       $ 5,398,950   

County of Jefferson Alabama, RB, Limited Obligation School, Series A:

      

5.50%, 1/01/21

      5,500         5,511,385   

5.25%, 1/01/23

      6,500         6,494,735   
     

 

 

  
        17,405,070   
     

 

 

  

Arizona – 4.9%

      

Arizona Board of Regents University of Arizona, RB, Speed,

      

5.00%, 8/01/28

      2,000         2,372,340   

Arizona Health Facilities Authority, Refunding RB, Phoenix Children’s Hospital, Series A,

      

5.00%, 2/01/30

      2,685         2,947,969   

City of Tucson Arizona, COP (AGC):

      

4.25%, 7/01/21

      1,870         2,058,197   

4.25%, 7/01/22

      1,895         2,081,013   

City of Tucson Arizona, COP, Refunding, (AGC),

      

4.00%, 7/01/20

      2,325         2,602,303   

Maricopa County IDA Arizona, RB, Arizona Charter Schools Project, Series A,

      

6.63%, 7/01/20

      1,700         1,395,020   

Northern Arizona University, RB,

      

5.00%, 6/01/41

      1,250         1,381,600   

Phoenix Mesa Gateway Airport Authority, RB, Mesa Project, AMT:

      

5.00%, 7/01/27

      700         773,542   

5.00%, 7/01/32

      1,200         1,299,228   

Pima County IDA, RB:

      

Charter Schools Project, Series C, 6.70%, 7/01/21

      950         954,541   

Charter Schools Project, Series K, 6.38%, 7/01/31

      895         896,888   

Pima County IDA, Refunding RB, Tucson Electric Power Co., San Juan, Series A,

      

4.95%, 10/01/20

      2,325         2,648,733   

Pinal County Electric District No. 3, Refunding RB,

      

5.00%, 7/01/25

      1,600         1,833,216   

Salt River Project Agricultural Improvement & Power District, RB, Series A,

      

5.00%, 1/01/25

      4,000         4,630,280   

Scottsdale IDA, Refunding RB, Scottsdale Healthcare, Series C (AGM),

      

5.00%, 9/01/35

      2,050         2,283,516   

State of Arizona, COP, Department of Administration, Series A (AGM),

      

4.25%, 10/01/23

      1,000         1,110,580   
     

 

 

  
        31,268,966   
     

 

 

  

Arkansas – 0.2%

      

University of Arkansas, Refunding RB, Various Facility, Series A,

      

5.00%, 11/01/31

      1,000         1,206,720   
     

 

 

  

California – 4.3%

      

California Health Facilities Financing Authority, RB, Sutter Health, Series B,

      

5.00%, 8/15/22

      2,135         2,556,876   

California HFA, RB, Home Mortgage, Series K, AMT,

      

4.55%, 8/01/21

      530         542,529   

California HFA, Refunding RB, Home Mortgage, Series M, AMT,

      

4.55%, 8/01/21

      1,055         1,066,489   

California Pollution Control Financing Authority, RB, AMT:

      

Republic Services Inc. Project, Series B, 5.25%, 6/01/23(a)

      605         685,586   

Waste Management Inc. Project, Series A-2, 5.40%, 4/01/25

      1,240         1,315,169   

California Pollution Control Financing Authority, Refunding RB, Pacific Gas, Series C, AMT (NPFGC),

      

4.75%, 12/01/23

      5,000         5,494,550   

City of Sacramento California, Special Tax Bonds, North Natomas Community Facilities, Series 4-C,

      

6.00%, 9/01/28

      2,990         3,054,076   

City of San Jose California, Refunding ARB, Series A-1, AMT,

      

5.00%, 3/01/25

      2,000         2,249,260   

State of California, GO:

      

5.50%, 4/01/28

      15         15,771   

Various Purpose, 5.75%, 4/01/31

      7,000         8,292,410   

Various Purpose, 5.00%, 11/01/32

      2,000         2,221,760   
     

 

 

  
        27,494,476   
     

 

 

  

Colorado – 0.8%

      

Plaza Metropolitan District No. 1 Colorado, Tax Allocation Bonds, Public Improvement Fee, Tax Increment,

      

7.50%, 6/01/14(b)

      4,500         4,964,850   
     

 

 

  

Connecticut – 2.2%

      

Connecticut State Development Authority, RB, Learjet Inc. Project, AMT,

      

7.95%, 4/01/26

      1,160         1,250,782   

Connecticut State Health & Educational Facility Authority, Refunding RB:

      

Connecticut College, Series I, 5.00%, 7/01/29

      1,075         1,261,770   

Connecticut College, Series I, 5.00%, 7/01/31

      620         724,377   

Connecticut College, Series I, 5.00%, 7/01/32

      500         581,050   

Lawrence & Memorial Hospital, Series F, 5.00%, 7/01/31

      1,780         1,971,777   

 

    BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013   1

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

Connecticut (concluded)

      

State of Connecticut, GO, Series B,

      

5.00%, 4/15/31

    $ 6,990       $ 8,304,889   
     

 

 

  
        14,094,645   
     

 

 

  

Delaware – 0.9%

      

Delaware State Municipal Electric Corp., Refunding RB,

      

5.00%, 7/01/37

      5,000         5,604,500   
     

 

 

  

Florida – 8.4%

      

Broward County Florida Airport System, RB, Series Q-2, AMT,

      

5.00%, 10/01/32

      1,250         1,392,825   

Broward County School Board Florida, Refunding COP, Series A, (AGM),

      

5.00%, 7/01/24

      10,000         11,704,700   

County of Lee Florida, Refunding ARB, Series A, AMT:

      

5.50%, 10/01/23

      1,000         1,182,950   

(AGM), 5.00%, 10/01/27

      1,635         1,830,660   

County of Miami-Dade Florida, Refunding RB, Series C (BHAC),

      

5.00%, 10/01/23

      8,000         9,396,160   

County of Miami-Dade Florida Transit System, Refunding RB, Sales Tax:

      

5.00%, 7/01/32

      1,500         1,728,525   

5.00%, 7/01/33

      3,000         3,441,240   

Greater Orlando Aviation Authority Airport Facilities, Refunding RB, Series B, AMT:

      

5.00%, 10/01/25

      1,000         1,141,600   

5.00%, 10/01/26

      2,935         3,330,315   

Highlands County Health Facilities Authority, Refunding RB, Adventist Health, Series G,

      

5.13%, 11/15/16 (b)

      35         40,795   

JEA Electric System, Refunding RB, Sub-Series B,

      

5.00%, 10/01/34

      4,615         5,299,451   

Midtown Miami Community Development District, Special Assessment Bonds:

      

Series A, 6.00%, 5/01/24

      2,880         2,923,632   

Series B, 6.50%, 5/01/37

      1,870         1,909,551   

Portofino Shores Community Development District, Special Assessment Bonds, Series A,

      

6.40%, 5/01/34

      1,080         1,092,906   

South Lake County Hospital District, RB, South Lake Hospital Inc.,

      

6.63%, 10/01/23

      2,390         2,466,169   

Sterling Hill Community Development District, Refunding RB, Special Assessment Bonds Series B,

      

5.50%, 11/01/10 (c)(d)

      155         100,752   

University of Florida Research Foundation Inc., RB (AMBAC),

      

5.13%, 9/01/33

      4,000         4,002,160   
     

 

 

  
        52,984,391   
     

 

 

  

Georgia – 1.1%

      

Fulton County Development Authority, Refunding RB, Robert Woodruff, Series B,

      

5.25%, 3/15/24

      3,000         3,406,110   

Medical Center Hospital Authority, Refunding RB, Columbus Regional Healthcare (AGM):

      

4.00%, 8/01/23

      1,500         1,617,105   

4.13%, 8/01/24

      2,000         2,152,200   
     

 

 

  
        7,175,415   
     

 

 

  

Guam – 0.4%

      

Territory of Guam, RB, Section 30, Series A,

      

5.38%, 12/01/24

      2,100         2,327,010   
     

 

 

  

Hawaii – 0.9%

      

State of Hawaii, Refunding ARB, Series A,

      

5.25%, 7/01/29

      5,000         5,859,000   
     

 

 

  

Idaho – 0.6%

      

Idaho Health Facilities Authority, Refunding RB, St. Luke’s Regional Medical Center (AGM),

      

4.63%, 7/01/30

      3,700         4,035,368   
     

 

 

  

Illinois – 6.1%

      

Chicago Transit Authority, RB,

      

5.25%, 12/01/31

      2,000         2,351,920   

City of Chicago Illinois, GARB, O’Hare International Airport, Third Lien, Series B-2, AMT (AGM),

      

5.75%, 1/01/23

      8,130         8,500,565   

Madison, Macoupin, Etc. Counties Community College District No. 536, GO, Refunding, Lewis & Clark Community College:

      

5.00%, 5/01/29

      350         394,804   

5.00%, 5/01/30

      475         532,850   

5.00%, 5/01/31

      500         559,515   

5.00%, 5/01/32

      500         556,430   

Railsplitter Tobacco Settlement Authority, RB:

      

5.50%, 6/01/23

      3,500         4,163,810   

6.25%, 6/01/24

      12,750         14,279,490   

Village of Hodgkins Illinois, RB, MBM Project, AMT,

      

5.90%, 11/01/17

      6,000         6,009,300   

Village of Wheeling Illinois, Tax Allocation Bonds, North Milwaukee/Lake-Cook TIF Project,

      

6.00%, 1/01/25

      1,425         1,433,094   
     

 

 

  
        38,781,778   
     

 

 

  

 

 

2   BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013    

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

Indiana – 4.0%

      

City of Whiting Indiana, RB, BP Products North America,

      

5.25%, 1/01/21

    $ 4,800       $ 5,909,232   

County of Jasper Indiana, Refunding RB, Northern Indiana Public Service Co., Series C (NPFGC),

      

5.85%, 4/01/19

      2,000         2,355,100   

Indiana Finance Authority, Refunding RB, Environmental Improvement, United Steel Corp. Project,

      

6.00%, 12/01/19

      5,000         5,579,800   

Indiana Finance Authority Wastewater Utility, RB, First Lien, Series A,

      

5.25%, 10/01/31

      10,000         11,805,900   
     

 

 

  
        25,650,032   
     

 

 

  

Iowa – 1.0%

      

Iowa Higher Education Loan Authority, RB, Private College Facility:

      

5.25%, 4/01/23

      695         823,130   

5.25%, 4/01/24

      730         857,984   

5.25%, 4/01/25

      520         607,984   

5.25%, 4/01/26

      360         419,346   

Iowa Higher Education Loan Authority, Refunding RB, Private College Facility:

      

5.00%, 9/01/20

      1,000         1,152,300   

5.00%, 9/01/22

      2,315         2,600,185   
     

 

 

  
        6,460,929   
     

 

 

  

Kansas – 2.1%

      

Kansas Development Finance Authority, RB, KU Health System, Series H:

      

5.00%, 3/01/26

      3,220         3,567,019   

5.00%, 3/01/27

      3,905         4,315,962   

Kansas Development Finance Authority, Refunding RB:

      

Adventist Health,

      

5.00%, 11/15/23

      1,500         1,733,265   

Sisters of Leavenworth, Series A,

      

4.00%, 1/01/22

      3,425         3,767,706   
     

 

 

  
        13,383,952   
     

 

 

  

Kentucky – 3.0%

      

Kentucky Economic Development Finance Authority, RB, Owensboro Medical Health System, Series A,

      

5.25%, 6/01/23

      8,650         9,797,509   

Kentucky State Property & Buildings Commission, Refunding RB, Project No. 93 (AGC),

      

5.25%, 2/01/24

      8,000         9,396,400   
     

 

 

  
        19,193,909   
     

 

 

  

Louisiana – 3.6%

      

Jefferson Parish Hospital Service District No. 1, Refunding RB, West Jefferson Medical Center, Series A, (AGM),

      

5.50%, 1/01/26

      3,000         3,411,660   

Louisiana Local Government Environmental Facilities & Community Development Authority, Refunding RB, BRCC Facilities Corp. Project:

      

5.00%, 12/01/27

      3,445         4,052,629   

5.00%, 12/01/28

      3,715         4,347,367   

Louisiana Public Facilities Authority, RB, Nineteenth Judicial District Court (NPFGC),

      

5.50%, 6/01/41

      2,000         2,159,940   

Louisiana Public Facilities Authority, Refunding RB, Entergy Gulf States Louisiana, LLC Project, Series A,

      

5.00%, 9/01/28

      2,000         2,165,200   

New Orleans Aviation Board Louisiana, Refunding GARB, Restructuring, Series A-2 (AGC),

      

6.00%, 1/01/23

      850         1,011,628   

Parish of St. Charles Louisiana Gulf Opportunity Zone, RB, Valero Energy Corp. Project,

      

4.00%, 12/01/40(a)

      1,760         1,941,491   

Port of New Orleans Louisiana, Refunding RB, Continental Grain Co. Project,

      

6.50%, 1/01/17

      3,500         3,521,560   
     

 

 

  
        22,611,475   
     

 

 

  

Maine – 0.3%

      

Portland New Public Housing Authority Maine, Refunding RB, Senior Living, Series A,

      

6.00%, 2/01/34

      1,965         2,026,013   
     

 

 

  

Maryland – 0.8%

      

Maryland EDC, RB, Transportation Facilities Project, Series A,

      

5.13%, 6/01/20

      1,750         2,036,878   

Maryland EDC, Refunding RB, CNX Marine Terminals Inc.,

      

5.75%, 9/01/25

      790         882,375   

Maryland Health & Higher Educational Facilities Authority, RB, Johns Hopkins Health System, Series B,

      

5.00%, 7/01/33

      1,140         1,344,242   

Maryland Industrial Development Financing Authority, RB, Our Lady of Good Counsel School, Series A,

      

6.00%, 5/01/35

      500         522,485   
     

 

 

  
        4,785,980   
     

 

 

  

Massachusetts – 0.2%

      

Massachusetts Health & Educational Facilities Authority, Refunding RB, Winchester Hospital,

      

5.00%, 7/01/25

      1,060         1,177,660   
     

 

 

  

Michigan – 4.0%

      

City of Detroit Michigan, Refunding RB, Second Lien, Series C (BHAC),

      

5.75%, 7/01/26

      4,235         4,887,529   

Manistee Area Public Schools, GO, Refunding (Q-SBLF),

      

5.00%, 5/01/25

      1,000         1,179,330   

 

    BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013   3

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

Michigan (concluded)

      

Michigan State Building Authority, Refunding RB, Facilities Program, Series II-A,

      

5.00%, 10/15/24

    $ 2,500       $ 2,968,500   

Michigan State Hospital Finance Authority, Refunding RB, Henry Ford Health,

      

5.25%, 11/15/24

      4,900         5,622,995   

State of Michigan Trunk Line, RB, Fund,

      

5.00%, 11/15/31

      2,000         2,366,260   

Wayne County Airport Authority, RB, Detroit Metropolitan Wayne County Airport, AMT (AGC),

      

4.75%, 12/01/18

      7,665         8,261,567   
     

 

 

  
        25,286,181   
     

 

 

  

Minnesota – 0.9%

      

City of St. Cloud Minnesota, Refunding RB, Centracare Health System, Series A,

      

4.25%, 5/01/21

      2,300         2,581,520   

Minneapolis-St Paul Metropolitan Airports Commission, Refunding RB, Series B:

      

5.00%, 1/01/30

      1,000         1,163,930   

5.00%, 1/01/31

      750         872,310   

University of Minnesota, RB, Biomedical Science Research Facilities Funding Program, Series B,

      

5.00%, 8/01/36

      1,000         1,169,510   
     

 

 

  
        5,787,270   
     

 

 

  

Mississippi – 0.8%

      

Mississippi Business Finance Corp., Refunding RB, System Energy Resource Inc. Project,

      

5.88%, 4/01/22

      5,000         5,015,250   
     

 

 

  

Missouri – 2.7%

      

Missouri Development Finance Board, RB, St. Joseph Sewage System Improvements, Series E,

      

4.75%, 5/01/26

      750         792,795   

Missouri Joint Municipal Electric Utility Commission Power, RB, Prairie State Project, Series A (BHAC),

      

5.00%, 1/01/32

      5,000         5,610,450   

Missouri State Environmental Improvement & Energy Resources Authority, Refunding RB, Revolving Funds Program, Series A,

      

5.00%, 1/01/25

      3,150         3,895,006   

Missouri State Health & Educational Facilities Authority, Refunding RB, SSM Health Care, Series B,

      

4.25%, 6/01/25

      5,975         6,545,553   
     

 

 

  
        16,843,804   
     

 

 

  

Montana – 0.5%

      

Montana Facility Finance Authority, Refunding RB, Series B,

      

5.00%, 1/01/24

      2,625         3,017,831   
     

 

 

  

Nebraska – 0.9%

      

Douglas County School District No. 17 Nebraska, GO, Refunding,

      

2.00%, 6/15/25

      4,380         4,272,471   

Lancaster County Hospital Authority No. 1, Refunding RB, Immanuel Obligation Group,

      

5.50%, 1/01/30

      1,000         1,131,070   
     

 

 

  
        5,403,541   
     

 

 

  

Nevada – 0.7%

      

County of Humboldt Nevada, Refunding RB, Idaho Power Co. Project,

      

5.15%, 12/01/24

      3,800         4,253,188   
     

 

 

  

New Hampshire – 0.6%

      

New Hampshire State Turnpike System, RB, Series C,

      

4.00%, 8/01/30

      3,765         4,032,390   
     

 

 

  

New Jersey – 15.5%

      

Essex County Improvement Authority, RB, Newark Project, Series A (AGM),

      

5.00%, 11/01/20

      2,000         2,318,600   

Garden State Preservation Trust, RB, Election of 2005, Series A (AGM)(b):

      

5.80%, 11/01/15

      3,635         4,160,076   

5.80%, 11/01/15

      5,050         5,779,472   

New Jersey EDA, RB:

      

Continental Airlines Inc. Project, AMT,

      

6.40%, 9/15/23

      6,040         6,201,510   

Motor Vehicle Surcharge, Series A (NPFGC),

      

5.25%, 7/01/33

      10,000         10,564,900   

New Jersey EDA, Refunding RB:

      

New Jersey American Water Co., Series E, AMT,

      

4.70%, 12/01/25

      3,000         3,287,280   

School Facilities Construction, Series AA,

      

4.25%, 12/15/24

      3,850         4,225,952   

School Facilities Construction, Series EE,

      

5.00%, 9/01/23

      3,465         4,096,219   

New Jersey Health Care Facilities Financing Authority, Refunding RB, Hackensack University Medical, Series B (AGM),

      

4.00%, 1/01/24

      635         688,842   

New Jersey Higher Education Student Assistance Authority, Refunding RB:

      

Series 1, AMT, 5.50%, 12/01/26

      1,665         1,882,416   

Series 1, AMT, 5.00%, 12/01/27

      12,000         12,944,640   

Series 1A, 4.75%, 12/01/21

      2,370         2,663,690   

 

4   BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013    

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

New Jersey (concluded)

      

New Jersey State Housing & Mortgage Finance Agency, RB, S/F Housing, Series X, AMT,

      

5.10%, 10/01/23

    $ 3,150       $ 3,355,349   

New Jersey State Turnpike Authority, Refunding RB, Series B,

      

5.00%, 1/01/29

      10,000         11,760,600   

New Jersey Transportation Trust Fund Authority, RB, Transportation System:

      

CAB, Series C (AMBAC), 3.99%, 12/15/25(e)

      9,450         5,683,702   

Series A, 5.25%, 6/15/24

      3,185         3,832,733   

Series B, 5.50%, 6/15/31

      10,000         11,895,500   

South Jersey Port Corp., RB, Marine Terminal, Series O-1 (AGC),

      

4.63%, 1/01/23

      1,375         1,547,233   

State of New Jersey, GO, Refunding, Series O,

      

5.25%, 8/01/21

      1,355         1,708,533   
     

 

 

  
        98,597,247   
     

 

 

  

New York – 19.9%

      

City of New York, New York, GO, Series D1,

      

5.13%, 12/01/26

      4,615         5,401,488   

City of New York, New York, GO, Refunding:

      

Series B, 5.00%, 8/01/30

      2,210         2,639,558   

Series E, 5.00%, 8/01/27

      3,500         4,154,570   

Essex County Industrial Development Agency, Refunding RB, International Paper, Series A, AMT,

      

5.20%, 12/01/23

      6,300         6,509,286   

Hudson New York Yards Infrastructure Corp., RB, Series A,

      

5.75%, 2/15/47

      4,250         5,071,568   

Long Island Power Authority, Refunding RB, Series A,

      

5.50%, 4/01/24

      1,000         1,191,390   

Metropolitan Transportation Authority, RB:

      

Sub-Series B-1, 5.00%, 11/15/24

      2,300         2,800,733   

Sub-Series B-4, 5.00%, 11/15/24

      1,500         1,826,565   

Transportation, Series A, 5.00%, 11/15/25

      1,980         2,229,995   

Metropolitan Transportation Authority, Refunding RB:

      

Series B, 5.25%, 11/15/25

      4,000         4,825,520   

Series F, 5.00%, 11/15/30

      1,460         1,706,039   

New York City Industrial Development Agency, RB, Continental Airlines Inc. Project, Mandatory Put Bonds, AMT,

  

   

8.38%, 11/01/16(a)

      3,500         3,517,500   

New York City Industrial Development Agency, Refunding RB, New York Stock Exchange Project, Series A,

      

4.25%, 5/01/24

      1,740         1,904,256   

New York City Transitional Finance Authority, RB, Fiscal 2009, Series S-3,

      

5.00%, 1/15/23

      3,560         4,158,329   

New York City Trust for Cultural Resources, Refunding RB, Carnegie Hall, Series A,

      

5.00%, 12/01/29

      2,750         3,144,020   

New York Liberty Development Corp., Refunding RB, Second Priority, Bank of America Tower at One Bryant Park Project,

      

5.63%, 7/15/47

      3,000         3,464,550   

New York State Dormitory Authority, LRB, Municipal Health Facilities, Sub-Series 2-4,

      

5.00%, 1/15/27

      6,900         7,863,861   

New York State Dormitory Authority, RB:

      

Education, Series D, 5.00%, 9/15/16(b)

      5         5,799   

Education, Series D, 5.00%, 3/15/31

      4,495         5,064,696   

Fordham University, Series A, 5.25%, 7/01/25

      900         1,079,604   

Mental Health Services (AGM), 5.00%, 8/15/18(b)

      10         12,159   

Mental Health Services (AGM), 5.00%, 2/15/22

      3,990         4,714,664   

Mount Sinai School of Medicine, Series A (NPFGC), 5.15%, 7/01/24

      1,000         1,161,700   

New York University Hospital Center, Series A, 5.00%, 7/01/22

      1,725         1,983,767   

New York University Hospital Center, Series A, 5.13%, 7/01/23

      1,670         1,920,533   

North Shore-Long Island Jewish Health System, Series A, 5.50%, 5/01/30

      1,495         1,705,571   

North Shore-Long Island Jewish Health System, Series D, 5.00%, 5/01/39

      1,600         1,811,136   

School Districts Financing Program, Series C, 5.00%, 10/01/24

      3,165         3,810,470   

New York State Dormitory Authority, Refunding RB:

      

Mount Sinai Hospital, Series A, 4.25%, 7/01/23

      2,225         2,434,217   

North Shore-Long Island Jewish Health System, Series E, 5.00%, 5/01/22

      650         741,442   

North Shore-Long Island Jewish Health System, Series E, 5.00%, 5/01/23

      2,160         2,446,524   

Yeshiva University, 4.00%, 9/01/23

      2,860         3,124,865   

 

    BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013   5

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

New York (concluded)

      

New York State Dormitory Authority, Refunding RB (concluded):

      

Yeshiva University,

      

4.25%, 9/01/24

    $ 2,750       $ 3,033,910   

Port Authority of New York & New Jersey, RB, JFK International Air Terminal,

      

5.00%, 12/01/20

      2,475         2,848,007   

Port Authority of New York & New Jersey, Refunding RB:

      

Consolidated, 152nd Series, AMT, 5.00%, 11/01/23

      1,000         1,123,450   

Consolidated, 153rd Series, 5.00%, 7/15/24

      2,010         2,349,730   

Sales Tax Asset Receivable Corp., Refunding RB, Series A (AMBAC),

      

5.25%, 10/15/27

      9,850         10,594,561   

Triborough Bridge & Tunnel Authority, Refunding RB, Sub-Series A,

      

5.00%, 11/15/24

      2,000         2,448,820   

United Nations Development Corp. New York, Refunding RB, Series A,

      

4.25%, 7/01/24

      2,985         3,287,291   

Westchester County Healthcare Corp. New York, Refunding RB, Senior Lien, Series A,

      

5.00%, 11/01/24

      5,470         6,197,237   
     

 

 

  
        126,309,381   
     

 

 

  

North Carolina – 1.9%

      

City of Charlotte North Carolina, RB, Charlotte Douglas Airport, Series A,

      

5.00%, 7/01/33

      4,000         4,587,840   

Gaston County Industrial Facilities & Pollution Control Financing Authority North Carolina, RB, Exempt Facilities, National Gypsum Co. Project, AMT,

      

5.75%, 8/01/35

      2,105         1,952,451   

North Carolina Capital Facilities Finance Agency, Refunding RB, Solid Waste Disposal, Duke Energy Carolinas Project, Series B,

      

4.38%, 10/01/31

      2,000         2,152,940   

North Carolina Medical Care Commission, Refunding RB:

      

Vidant Health, Series A, 5.00%, 6/01/36

      1,500         1,643,955   

WakeMed, Series A, 5.00%, 10/01/31

      1,500         1,751,430   
     

 

 

  
        12,088,616   
     

 

 

  

Ohio – 0.5%

      

City of Cincinnati Ohio, GO, Refunding, Various Purpose, Series A,

      

4.38%, 12/01/30

      900         975,339   

Kent State University, RB, General Receipts, Series A,

      

5.00%, 5/01/37

      1,000         1,137,940   

Miami University, RB, General Receipts,

      

4.00%, 9/01/33

      1,000         1,063,010   
     

 

 

  
        3,176,289   
     

 

 

  

Oregon – 1.8%

      

City of Tigard Washington County Oregon, Refunding RB, Water System,

      

5.00%, 8/01/37

      2,000         2,323,140   

Oregon Health & Science University, Refunding RB:

      

Series A, 5.00%, 7/01/26

      1,500         1,774,875   

Series E, 5.00%, 7/01/32

      1,250         1,451,512   

Oregon State Facilities Authority, Refunding RB, Reed College Project, Series A,

      

5.00%, 7/01/29

      1,835         2,149,189   

State of Oregon, GO:

      

Odot Project, Tax-Exempt, Series I, 5.00%, 5/01/37

      1,000         1,177,260   

Series H, 5.00%, 5/01/36

      2,000         2,356,300   
     

 

 

  
        11,232,276   
     

 

 

  

Pennsylvania – 8.4%

      

City of Philadelphia Pennsylvania, RB, Series A, AMT (AGM),

      

5.00%, 6/15/20

      2,895         3,202,391   

City of Pittsburgh Pennsylvania, GO, Series C (AGM),

      

5.25%, 9/01/18

      6,430         7,159,162   

City of Pittsburgh Pennsylvania, GO, Refunding, Series B (AGM),

      

5.25%, 9/01/17

      9,630         10,770,673   

County of Allegheny Pennsylvania, GO, Series C-67:

      

5.00%, 11/01/25

      2,700         3,129,651   

5.00%, 11/01/26

      2,375         2,709,020   

County of Allegheny Pennsylvania, GO, Refunding, Series C-68,

      

5.00%, 11/01/25

      2,515         2,915,212   

Montgomery County IDA Pennsylvania, MRB, Whitemarsh Continuing Care,

      

6.00%, 2/01/21

      3,500         3,579,520   

Pennsylvania Economic Development Financing Authority, RB, National Gypsum Co., Series A, AMT,

      

6.25%, 11/01/27

      7,710         7,709,229   

Pennsylvania Turnpike Commission, RB, Sub-Series B,

      

5.25%, 12/01/31

      4,000         4,586,680   

South Fork Municipal Authority, Refunding RB, Conemaugh Valley Memorial, Series A (AGC),

      

6.00%, 7/01/26

      6,225         7,381,045   
     

 

 

  
        53,142,583   
     

 

 

  

Puerto Rico – 4.2%

      

Puerto Rico Aqueduct & Sewer Authority, Refunding RB, Senior Lien, Series A (AGC),

      

5.00%, 7/01/25

      3,215         3,344,661   

 

6   BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013    

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

Puerto Rico (concluded)

      

Puerto Rico Electric Power Authority, RB, Series TT,

      

5.00%, 7/01/27

    $ 6,500       $ 6,574,100   

Puerto Rico Highway & Transportation Authority, RB, Series Y (AGM),

      

6.25%, 7/01/21

      3,000         3,592,260   

Puerto Rico Housing Finance Authority, Refunding RB, Subordinate, Capital Fund Modernization,

      

5.13%, 12/01/27

      9,450         10,146,181   

Puerto Rico Sales Tax Financing Corp., RB, First Sub-Series A,

      

6.00%, 8/01/42

      650         715,176   

Puerto Rico Sales Tax Financing Corp., Refunding RB, Series C,

      

5.25%, 8/01/40

      2,000         2,175,640   
     

 

 

  
        26,548,018   
     

 

 

  

Rhode Island – 0.3%

      

Rhode Island Health & Educational Building Corp., RB, Providence College,

      

5.00%, 11/01/34

      1,750         1,990,100   
     

 

 

  

South Carolina – 0.2%

      

County of Florence South Carolina, Refunding RB, McLeod Regional Medical Center, Series A,

      

4.50%, 11/01/25

      1,000         1,108,100   
     

 

 

  

South Dakota – 0.2%

      

South Dakota Health & Educational Facilities Authority, Refunding RB, Regional Health,

      

5.00%, 9/01/25

      1,000         1,119,400   
     

 

 

  

Tennessee – 1.8%

      

Chattanooga-Hamilton County Hospital Authority Tennessee, Refunding RB, Erlanger Health (AGM),

      

5.00%, 10/01/22

      1,620         1,872,931   

Johnson City Health & Educational Facilities Board, RB, Appalachian Christian Village Project, Series A,

      

6.00%, 2/15/19

      1,360         1,361,673   

Knox County Health Educational & Housing Facilities Board Tennessee, Refunding RB, Eastowne Village Project,

      

4.00%, 6/01/31(a)

      3,750         4,118,587   

Memphis-Shelby County Sports Authority Inc., Refunding RB:

      

Memphis Arena Project, Series A, 5.00%, 11/01/23

      2,695         3,099,789   

Memphis Arena Project, Series B, 5.00%, 11/01/22

      1,000         1,159,610   
     

 

 

  
        11,612,590   
     

 

 

  

Texas – 5.7%

      

City of Houston Texas, Refunding ARB, Subordinate Lien, Series A, AMT:

      

5.00%, 7/01/25

      1,500         1,731,900   

5.00%, 7/01/32

      1,010         1,139,260   

Dallas-Fort Worth International Airport Facilities Improvement Corp., RB, Series 2001-A-1, AMT,

      

6.15%, 1/01/16

      4,000         4,007,280   

Dallas/Fort Worth International Airport, Refunding RB, AMT:

      

Series E, 5.00%, 11/01/26

      2,185         2,472,175   

Series E, 5.00%, 11/01/27

      4,960         5,586,398   

Series F, 5.00%, 11/01/31

      6,345         7,040,348   

Frisco ISD, GO, Refunding (PSF-GTD),

      

4.25%, 8/15/28

      4,000         4,551,680   

Love Field Airport Modernization Corp., RB, Southwest Airlines Co. Project, AMT,

      

5.00%, 11/01/28

      2,000         2,178,600   

San Jacinto River Authority, RB, Special Project (AGM),

      

5.25%, 10/01/25

      2,910         3,351,622   

Socorro ISD, GO, Refunding (PSF-GTD), School Building:

      

5.00%, 8/15/30

      1,000         1,176,050   

5.00%, 8/15/32

      2,500         2,915,775   
     

 

 

  
        36,151,088   
     

 

 

  

Vermont – 0.3%

      

Vermont Educational & Health Buildings Financing Agency, Refunding RB, Middlebury College Project,

      

5.00%, 11/01/32

      1,680         2,010,809   
     

 

 

  

Virginia – 2.6%

      

James City County EDA, Refunding RB, First Mortgage, Williamsburg Lodge, Series A:

      

5.75%, 3/01/17

      3,285         3,299,158   

6.00%, 3/01/23

      1,150         1,155,198   

Roanoke EDA, Refunding RB, Carilion Health System, Series B (AGM),

      

5.00%, 7/01/38

      3,155         3,474,696   

Tobacco Settlement Financing Corp. Virginia, RB, Asset-Backed,

      

5.63%, 6/01/15(b)

      6,000         6,675,960   

Virginia Small Business Financing Authority, RB, Senior Lien, Express Lanes LLC, AMT,

      

5.00%, 7/01/34

      1,560         1,622,525   
     

 

 

  
        16,227,537   
     

 

 

  

Washington – 1.4%

      

State of Washington, GO, Motor Vehicle Fuel Tax, Series E,

      

4.00%, 2/01/34(f)

      8,000         8,615,040   
     

 

 

  

West Virginia – 2.7%

      

West Virginia Hospital Finance Authority, Refunding RB, Charleston, Series A,

      

5.13%, 9/01/23

      4,000         4,421,200   
     

 

 

  

 

    BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013   7

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Municipal Bonds

    Par
(000)		      Value  

West Virginia (concluded)

      

West Virginia University, RB, Board of Governors University Improvement, Series B:

      

5.00%, 10/01/29

    $ 7,520       $ 8,822,915   

5.00%, 10/01/30

      3,500         4,088,770   
     

 

 

  
        17,332,885   
     

 

 

  

Wisconsin – 2.2%

      

Public Finance Authority, Refunding RB, Senior Obligation Group, Series B, AMT,

      

5.25%, 7/01/28

      4,765         5,193,231   

State of Wisconsin, GO, Series C,

      

4.50%, 5/01/30

      6,120         6,992,834   

Wisconsin Housing & EDA, RB, Series C, AMT,

      

4.85%, 9/01/26

      2,000         2,080,740   
     

 

 

  
        14,266,805   
     

 

 

  

Total Municipal Bonds – 129.2%

         819,660,358   
     

 

 

  

Municipal Bonds Transferred to Tender Option Bond (TOB) Trusts (g)

      

California – 4.4%

      

Peralta Community College District, GO, Election of 2000, Series D (AGM),

      

5.00%, 8/01/30

      10,140         10,549,757   

Sequoia Union High School District California, GO, Refunding, Election of 2004, Series B (AGM),

      

5.50%, 7/01/35

      9,028         10,146,472   

University of California, Refunding RB, Limited Project, Series G,

      

5.00%, 5/15/37

      6,440         7,466,121   
     

 

 

  
        28,162,350   
     

 

 

  

Illinois – 3.9%

      

Du Page & Will Counties Community School District No. 204 Indian, GO, School Building, Series A (NPFGC),

      

5.25%, 12/30/22

      8,650         10,120,309   

McHenry County Conservation District Illinois, GO (AGM),

      

5.13%, 2/01/27

      12,695         14,260,761   
     

 

 

  
        24,381,070   
     

 

 

  

Louisiana – 4.1%

      

State of Louisiana, GO, Series A,

      

5.00%, 8/01/24

      12,000         14,890,800   

State of Louisiana Gas & Fuels, Refunding RB, Series A-1,

      

4.00%, 5/01/34

      10,000         10,768,600   
     

 

 

  
        25,659,400   
     

 

 

  

Massachusetts – 3.3%

      

Massachusetts Development Finance Agency, Refunding RB, Partners Healthcare, Series L,

      

5.00%, 7/01/31

      10,175         11,851,216   

Massachusetts School Building Authority, RB, Series A (AGM):

      

5.00%, 8/15/15 (b)

      1,075         1,182,245   

5.00%, 8/15/30

      7,264         7,991,936   
     

 

 

  
        21,025,397   
     

 

 

  

Minnesota – 1.9%

      

State of Minnesota, GO, State Various Purpose, Series A,

      

4.00%, 8/01/29

      10,525         11,882,579   
     

 

 

  

New Jersey – 1.9%

      

New Jersey Transportation Trust Fund Authority, RB, Transportation System, Series D (AGM),

      

5.00%, 6/15/19

      11,120         12,148,489   
     

 

 

  

New York – 9.8%

      

City of New York, New York, GO:

      

Sub-Series B-1, 5.25%, 9/01/22

      8,250         9,961,875   

Sub-Series I-1, 5.50%, 4/01/21

      4,992         6,191,446   

City of New York, New York, GO, Refunding, Series E,

      

5.00%, 8/01/24

      3,990         4,785,327   

New York City Municipal Water Finance Authority, Refunding RB, Water & Sewer System, Series A,

      

4.75%, 6/15/30

      8,000         8,955,680   

New York State Dormitory Authority, Refunding LRB, State University Dormitory Facilities, Series A,

      

5.00%, 7/01/42

      2,240         2,583,235   

New York State Urban Development Corp., RB, State Personal Income Tax, State Facilities, Series A-1 (NPFGC),

      

5.25%, 3/15/14 (b)

      10,000         10,560,200   

New York State Urban Development Corp., Refunding RB, Service Contract, Series B,

      

5.00%, 1/01/21

      8,003         9,374,041   

Port Authority of New York & New Jersey, RB, Consolidated, 169th Series, AMT,

      

5.00%, 10/15/26

      5,530         6,454,616   

Suffolk County Water Authority, Refunding RB,

      

3.00%, 6/01/25

      3,242         3,362,755   
     

 

 

  
        62,229,175   
     

 

 

  

Washington – 1.8%

      

Snohomish County School District No. 15 – Edmonds Washington, GO, (NPFGC),

      

5.00%, 6/01/16 (b)

      10,000         11,463,100   
     

 

 

  

Total Municipal Bonds Transferred to Tender Option Bond (TOB) Trusts – 31.1%

         196,951,560   
     

 

 

  

Total Long-Term Investments
(Cost – $931,505,374) – 160.3%

         1,016,611,918   
     

 

 

  

 

8   BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013    

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
   (Percentages shown are based on Net Assets)

 

Short-Term Securities

    Shares      Value  

Money Market Funds – 0.6%

      

FFI Institutional Tax-Exempt Fund,

      

0.01%(h)(i)

      3,785,846       $ 3,785,846   
     

 

 

  
      Par
(000)		         

Connecticut – 0.3%

      

Connecticut Housing Finance Authority, Refunding RB, VRDN, Housing Mortgage Finance Program, Sub-Series A-2 (JPMorgan Chase NA SBPA),

      

0.12%, 2/01/13(j)

    $ 2,100         2,100,000   
     

 

 

  

Massachusetts – 0.3%

      

Massachusetts Health & Educational Facilities Authority, RB, VRDN, Stonehill College, Series K (Bank of America NA LOC),

      

0.09%, 2/01/13(j)

      2,200         2,200,000   
     

 

 

  

Texas – 0.1%

      

Gulf Coast Waste Disposal Authority, RB, VRDN, Air Products Project,

      

0.09%, 2/07/13(j)

      400         400,000   
     

 

 

  

Total Short-Term Securities
(Cost – $8,485,846) – 1.3%

         8,485,846   
     

 

 

  

Total Investments (Cost–$939,991,220*) – 161.6%

         1,025,097,764   

Other Assets Less Liabilities – 0.3%

         2,157,784   

Liability for TOB Trust Certificates, Including Interest Expense and Fees Payable – (16.7)%

         (106,003,003 ) 

VRDP Shares, at Liquidation Value – (45.2)%

         (287,100,000 ) 

Net Assets Applicable to Common Shares – 100.0%

       $ 634,152,545   
     

 

 

  

 

* As of January 31, 2013, gross unrealized appreciation and gross unrealized depreciation based on cost for federal income tax purposes were as follows:

 

Tax cost

    $ 834,151,338   
  

 

 

  

Gross unrealized appreciation

    $ 85,814,927   

Gross unrealized depreciation

      (807,209 ) 
  

 

 

  

Net unrealized appreciation

    $ 85,007,718   
  

 

 

  

Notes to Schedule of Investments

 

(a) Variable rate security. Rate shown is as of report date.

 

(b) US government securities, held in escrow, are used to pay interest on this security, as well as to retire the bond in full at the date indicated, typically at a premium to par.

 

(c) Issuer filed for bankruptcy and/or is in default of principal and/or interest payments.

 

(d) Non-income producing security.

 

(e) Represents a zero-coupon bond. Rate shown reflects the current yield as of report date.

 

(f) When-issued security. Unsettled when-issued transactions were as follows:

 

Counterparty

    Value      Unrealized
Depreciation		  

Citigroup Inc.

    $ 8,615,040       $ (56,640 ) 

 

(g) Securities represent bonds transferred to a TOB in exchange for which the Fund acquired residual interest certificates. These securities serve as collateral in a financing transaction.

 

(h) Investments in issuers considered to be an affiliate of the Fund during the period ended January 31, 2013, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

 

Affiliate

    Shares held
at April 30,
2012		      Net
Activity		      Shares held
at
January 31,
2013		      Income  

FFI Institutional Tax-Exempt Fund

      3,601,217         184,629         3,785,846       $ 51   

 

(i) Represents the current yield as of report date.

 

(j) Variable rate security. Rate shown is as of report date and maturity shown is the date the principal owed can be recovered through demand.

 

 

    BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013   9

Schedule of Investments (continued)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
  

 

•  

Financial futures contracts as of January 31, 2013 were as follows:

 

Contracts
Sold		   

Issue

   

Exchange

    Expiration    Notional Value      Unrealized
Depreciation		  
(158)    10-Year US Treasury Note    Chicago Board of Trade    March 2013    $ 20,742,438       $ (7,653 ) 

Portfolio Abbreviations

To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of many of the securities have been abbreviated according to the following list:

 

AGC    Assured Guaranty Corp.      
AGM    Assured Guaranty Municipal Corp.   
AMBAC    American Municipal Bond Assurance Corp.   
AMT    Alternative Minimum Tax (subject to)   
ARB    Airport Revenue Bonds      
BHAC    Berkshire Hathaway Assurance Corp.   
CAB    Capital Appreciation Bonds      
COP    Certificates of Participation      
EDA    Economic Development Authority   
EDC    Economic Development Corp.   
GARB    General Airport Revenue Bonds   
GO    General Obligation Bonds      
HFA    Housing Finance Agency      
IDA    Industrial Development Authority   
ISD    Independent School District      
LOC    Letter of Credit      
LRB    Lease Revenue Bonds      
MRB    Mortgage Revenue Bonds      
NPFGC    National Public Finance Guarantee Corp.   
PSF-GTD    Permanent School Fund Guaranteed   
Q-SBLF    Qualified School Bond Loan Fund   
RB    Revenue Bonds      
SBPA    Stand-by Bond Purchase Agreements   
S/F    Single-Family      
VRDN    Variable Rate Demand Notes      

 

•  

Fair Value Measurements – Various inputs are used in determining the fair value of investments and derivative financial instruments. These inputs to valuation techniques are categorized into a disclosure hierarchy consisting of three broad levels for financial reporting purposes as follows:

 

  •  

Level 1 – unadjusted price quotations in active markets/exchanges for identical assets and liabilities that the Fund has the ability to access

 

  •  

Level 2 – other observable inputs (including, but not limited to, quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market-corroborated inputs)

 

  •  

Level 3 – unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Fund’s own assumptions used in determining the fair value of investments and derivative financial instruments)

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement falls in its entirety is determined based on the lowest level input that is significant to the fair value measurement in its entirety.

 

 

10   BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013    

Schedule of Investments (concluded)    BlackRock Muni Intermediate Duration Fund, Inc. (MUI)
  

 

Changes in valuation techniques may result in transfers into or out of an assigned level within the disclosure hierarchy. In accordance with the Fund’s policy, transfers between different levels of the fair value disclosure hierarchy are deemed to have occurred as of the beginning of the reporting period. The categorization of a value determined for investments and derivative financial instruments is based on the pricing transparency of the investment and derivative financial instrument and is not necessarily an indication of the risks associated with investing in those securities. For information about the Fund’s policy regarding valuation of investments and derivative financial instruments and other significant accounting policies, please refer to the Fund’s most recent financial statements as contained in its semi-annual report.

The following tables summarize the Fund’s investments and derivative financial instruments categorized in the disclosure hierarchy as of January 31, 2013:

 

      Level 1      Level 2      Level 3      Total  

Assets:

            

Investments:

            

Long-Term Investments1

      –       $ 1,016,611,918         –       $ 1,016,611,918   

Short-Term Securities

    $ 3,785,846         4,700,000         –         8,485,846   
  

 

 

     

 

 

     

 

 

     

 

 

  

Total

    $ 3,785,846       $ 1,021,311,918         –       $ 1,025,097,764   
  

 

 

     

 

 

     

 

 

     

 

 

  

 

1 

See above Schedule of Investments for values in each state or political subdivision.

 

      Level 1     Level 2      Level 3      Total  

Derivative Financial Instruments2

           

Liabilities:

           

Interest rate contracts

    $ (7,653 )      –         –       $ (7,653 ) 
  

 

 

    

 

 

     

 

 

     

 

 

  

 

2 

Derivative financial instruments are financial futures contracts, which are valued at the unrealized appreciation/depreciation on the instrument.

Certain of the Fund’s assets and liabilities are held at carrying amount, which approximates fair value for financial reporting purposes. As of January 31, 2013, such assets and liabilities are categorized within the disclosure hierarchy as follows:

 

      Level 1      Level 2     Level 3      Total  

Assets:

           

Cash

    $ 259,052         –        –       $ 259,052   

Liabilities:

           

TOB trust certificates

      –       $ (105,938,708 )      –         (105,938,708 ) 

VRDP shares

      –         (287,100,000 )      –         (287,100,000 ) 
  

 

 

     

 

 

    

 

 

     

 

 

  

Total

    $ 259,052       $ (393,038,708 )      –       $ (392,779,656 ) 
  

 

 

     

 

 

    

 

 

     

 

 

  

There were no transfers between levels during the period ended January 31, 2013.

 

    BLACKROCK MUNI INTERMEDIATE DURATION FUND, INC.    JANUARY 31, 2013   11

Item 2    –    Controls and Procedures
2(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 Exchange Act of 1934, as amended.
2(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) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.
Item 3    –    Exhibits

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/ John M. Perlowski

    
  John M. Perlowski    
  Chief Executive Officer (principal executive officer) of BlackRock Muni Intermediate Duration Fund, Inc.

Date: March 26, 2013

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/ John M. Perlowski

    
  John M. Perlowski    
  Chief Executive Officer (principal executive officer) of BlackRock Muni Intermediate Duration Fund, Inc.

Date: March 26, 2013

  
By:  

/s/ Neal J. Andrews

    
  Neal J. Andrews    
  Chief Financial Officer (principal financial officer) of BlackRock Muni Intermediate Duration Fund, Inc.

Date: March 26, 2013