--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISOR
--------------------------------------------------------------------------------
                                                                    May 31, 2002
Dear Shareholder:

     The  semi-annual  period ended April 30, 2002,  saw general  turmoil in the
equity markets.  However, during this time bond markets,  particularly municipal
securities,  proved to be a shelter for investors  seeking  refuge from unstable
economic conditions.  Over the period,  municipal bonds outperformed  Treasuries
returning 1.08% versus -1.88%, respectively,  as measured by the LEHMAN BROTHERS
MUNICIPAL BOND INDEX* and LEHMAN BROTHERS TREASURY INDEX.**

     During the six-month period, the bond market was not without volatility. In
the aftermath of the  September  11th  tragedy,  the Federal  Reserve Board (the
"Fed")  lowered  interest  rates four times  before the year  ended.  Since bond
prices  generally  move in the opposite  direction  from  interest  rates,  this
aggressive  action  initially sent bond yields downward and prices (and returns)
markedly higher.

     For the first quarter of 2002, issues of new municipal securities increased
by 10%,  totaling $65 billion,  setting a record for the largest  first  quarter
issuance in history. Due in part to budgetary pressures,  a slowing economy, and
municipalities' ongoing need to finance infrastructure projects, the final month
of  the  period  continued  to  see  heightened   levels  of  new  issuance  and
year-to-date  volume has now reached $87 billion. In March, fixed income markets
suffered  following  the Fed's  announcement  of a bias  shift  from  "potential
weakness" to  "neutral,"  which led the  investment  community to  anticipate an
economy  in  the  early  stages  of  recovery.   Despite  higher  than  expected
unemployment  numbers during April,  economic indicators generally concluded the
period on a more positive tone than they began. U.S. manufacturing,  as measured
by the ISM (Institute for Supply  Management)  Index,  remained at  expansionary
levels in April and the Consumer  Confidence Index has bounced from its November
low on  increasing  expectations.  However,  we remain  cautious that the strong
consumer  demand,  which has created an increasingly  optimistic  stimulus,  may
become exhausted and slow.

     Interest rate fluctuations,  such as we have seen recently can be difficult
for  investors,  especially  those who depend on fixed  income  investments  for
current income.  We encourage you to consult with your financial advisor to help
you establish a strategy that best fits your overall goals and risk tolerance.

     The  semi-annual  report  includes a summary of market  conditions over the
period, a review of the strategy  employed by your Trust's  portfolio  managers,
the Trust's  unaudited  financial  statements  and a listing of the  portfolio's
holdings.  We  encourage  you to read the  report  and we thank  you for  making
BlackRock part of your investment program.

Sincerely,



/s/ Laurence D. Fink                   /s/ Ralph L. Schlosstein
--------------------                   ------------------------
Laurence D. Fink                       Ralph L. Schlosstein
Chairman                               President


----------
*    The Lehman  Brothers  Municipal Bond Index measures the  performance of the
     investment grade long-term  tax-exempt bond market.  The Index is unmanaged
     and cannot be purchased directly.
**   The Lehman  Brothers  Treasury Index measures the performance of the public
     obligations  of the U.S.  Treasury.  The Index is  unmanaged  and cannot be
     purchased directly.



                                        1

                                                                    May 31, 2002
Dear Shareholder:

     We are  pleased  to  present  the  unaudited  semi-annual  report  for  The
BlackRock  California  Investment Quality Municipal Trust Inc. (the "Trust") for
the period  ended  April 30,  2002.  We would like to take this  opportunity  to
review the Trust's stock price and net asset value (NAV) performance,  summarize
market developments and discuss recent portfolio management activity.

     The Trust is a non-diversified, actively managed closed-end bond fund whose
shares are traded on the American  Stock  Exchange  under the symbol "RAA".  The
Trust's  investment  objective is to provide high current  income that is exempt
from  regular   federal  and  California   income  taxes   consistent  with  the
preservation of capital.  The Trust seeks to achieve this objective by primarily
investing in investment  grade (rated "AAA" to "BBB" by a major rating agency or
of equivalent quality) municipal debt securities issued by local  municipalities
throughout California.

     The table below  summarizes  the changes in the Trust's stock price and net
asset value:

                             --------------------------------------------------
                              4/30/02   10/31/01   CHANGE      HIGH       LOW
-------------------------------------------------------------------------------
STOCK PRICE                   $15.15     $15.55    (2.57)%    $15.60    $15.00
-------------------------------------------------------------------------------
NET ASSET VALUE (NAV)         $15.07     $15.30    (1.50)%    $15.39    $14.90
-------------------------------------------------------------------------------

THE FIXED INCOME MARKETS

     Economic  performance  was mixed  during the  semi-annual  period  although
increasingly  positive  economic  data  surfaced  as time  progressed.  The U.S.
economy  showed signs of a rebound on the heels of strong  consumer and military
spending,  which helped to overcome the  devastation of September  11th. The Fed
also provided further monetary stimulus by cutting interest rates two additional
times prior to year-end,  leaving the federal  funds rate at 1.75%.  This was in
addition to nine previous  interest rate  reductions by the Fed during 2001. The
Consumer  Confidence  Index  initially  reached its lowest  level in eight years
during November, but marked a steady climb during the remainder of the period as
investors readily anticipated an economic recovery. The economy continued to see
increasingly  optimistic data emerge throughout the first quarter of 2002. Gross
Domestic Product ("GDP") during the first quarter rose 5.6%, the fastest rate in
two years, and the manufacturing  sector saw substantial gains as the Purchasing
Managers  Index  indicated  expansion for the first time in 19 months.  Although
productivity  increased  8.6% during the first  quarter,  unemployment  in April
reached 6.0%. However,  the unexpectedly high unemployment number is believed to
be a result of recent legislation prompting many to apply for extended benefits.
After  surprising  growth in the first quarter of 2002, the fixed income markets
came under pressure  following the March 19th  announcement  by the Federal Open
Market  Committee  ("FOMC")  to leave  rates  steady,  citing a bias  shift from
"potential  weakness" to  "neutral."  The equity  markets did not  significantly
benefit  from  the  emergence  of the  strong  growth  indicators  as they  were
challenged by several high profile  bankruptcies.  Closing out the period, April
saw the  largest  advancement  in retail  sales in six months  and  inflationary
pressures remain relatively in check. However,  concerns regarding the corporate
environment  and  violence in the Middle East and Asia have left many  investors
apprehensive  about the markets.  Going forward,  although low inventory  levels
should  continue  to provide  support for  manufacturing  data,  concerns  exist
surrounding the long-term strength of the highly leveraged consumer.

     Following a steepening of the yield curve  throughout the majority of 2001,
yields over the period trended  higher causing the curve to flatten.  Signs of a
recovering  economy  caused  yields to rise in sympathy with  expectations  of a
higher fed funds rate by year end. The 5- to 10-year  portion of the yield curve
came  under  the most  pressure,  rising 93 and 86 basis  points,  respectively,
during the period.  Yields on 2- and 30-year maturities also suffered during the
period rising 80 and 72 basis points,  respectively.  After struggling following
the FOMC's  announcement  of a bias shift in March,  Treasuries  bounced back in
April.  April's performance was driven by economic pessimism,  which surfaced as
enthusiasm  for a rapid economic  recovery  waned amidst  tensions in the Middle
East,  cautious  corporate  earnings  announcements and government  reports of a
slower growth pattern. Looking ahead, a budget surplus of only $78 billion and a
30% decline in tax revenues for 2001 has caused Treasury finances to deteriorate
sharply and should result in larger auction sizes.  However,  the allowable debt
limit set by Congress will


                                       2


soon be reached,  possibly leading the Treasury to pursue additional  methods of
financing.  As of April 30, 2002, the 10-year Treasury was yielding 5.09% versus
4.23% on October 31, 2001.

     On a tax-adjusted basis,  municipal bonds outperformed the taxable domestic
bond market for the semi-annual period ended April 30, 2002, returning 1.76% (as
measured by the LEHMAN BROTHERS  MUNICIPAL BOND INDEX at a tax bracket of 38.6%)
versus -0.01% for the LEHMAN BROTHERS AGGREGATE INDEX. Strong  institutional and
retail  demand for  municipal  bonds  allowed the sector to show  outperformance
versus  Treasuries  across the entire curve.  Demand was driven primarily by two
factors:  yields on municipal  securities remain  attractive versus  alternative
fixed income  investments,  and continued  volatility in the equity  markets led
investors to seek  diversification.  Strong  demand was met by  significant  new
issuance as the first quarter of 2002 posted a 10% increase over the same period
in 2001 and was the largest first quarter  total on record.  In April,  new bond
issuance  continued  its strong trend with a 12% increase  from a year  earlier,
bringing total year-to-date issuance to $87 billion. Similar to Treasuries,  the
municipal  yield  curve  flattened  over  the  period  as  yields  on  short  to
intermediate maturities rose more quickly than long-term rates.

     California's economy turned sluggish a year ago. Employment growth actually
stopped in July 2001 and through  November 2002, the State lost jobs. Since then
employment is experiencing small gains.  However, the unemployment rate is still
rising.  April  2002's  jobless rate was 6.1%,  significantly  higher than April
2001's 5%, indicating that even more people are seeking employment.

     California's General Fund revenues reflect the slower economy. Year to date
(April) revenues are 2.5% ($1.14 billion) below revised expectations. In May the
Governor  acknowledged  and addressed a projected  FY2003 $23 billion budget gap
(approximately 30% of revenues);  his remedies include tobacco tax increases and
motor vehicle registration fee hikes,  tobacco  securitization bond proceeds and
expenditure   cuts.  These  proposals  are  currently  being  discussed  in  the
Legislature. The State's General Fund is under additional stress due to the $6.2
billion  loan to the  Department  of Water  Resources  in 2001 to pay for  power
purchases.  The State had  expected to be  reimbursed  in FY 2002 through a bond
sale that remains stalled.

     California's  unresolved  energy issues  combined with the slowing  economy
continue to negatively  impact the State's fiscal position.  The State's ratings
were lowered to A1/A+ citing the General Fund's weakened  position;  both rating
agencies maintain a negative outlook.

THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

     The Trust's portfolio is actively managed to diversify  exposure to various
sectors,  issuers,  revenue sources and security types.  BlackRock's  investment
strategy  emphasizes  a  relative  value  approach,  which  allows  the Trust to
capitalize  upon  changing  market  conditions  by rotating  municipal  sectors,
credits and coupons.

     Additionally, the Trust employs leverage to enhance its income by borrowing
at short-term  municipal  rates and  investing  the proceeds in longer  maturity
issues that have higher  yields.  The degree to which the Trust can benefit from
its use of leverage  may affect its ability to pay high monthly  income.  At the
end of the semi-annual period, the Trust's leverage amount was approximately 33%
of total assets.

     Municipals  outperformed  Treasuries  for the period  due to strong  retail
demand despite record issuance.  The curve flattened over the period as rates at
the short end of the curve rose rapidly in anticipation of the Fed raising rates
in an economic recovery.  Rates at the long end of the curve rose moderately and
the curve  remains  steep on a historical  basis.  We continue to focus on bonds
with higher coupons as they provide the most  attractive  income stream and also
tend to have superior performance in a rising rate environment.


                                       3


     The following charts show the Trust's asset  composition and credit quality
allocations:

--------------------------------------------------------------------------------
                                SECTOR BREAKDOWN
--------------------------------------------------------------------------------
SECTOR                             APRIL 30, 2002     OCTOBER 31, 2001
--------------------------------------------------------------------------------
Transportation                          23%                 22%
--------------------------------------------------------------------------------
Lease Revenue                           17%                 17%
--------------------------------------------------------------------------------
School                                  16%                 16%
--------------------------------------------------------------------------------
District                                10%                 10%
--------------------------------------------------------------------------------
Power                                   10%                 10%
--------------------------------------------------------------------------------
Housing                                  8%                  9%
--------------------------------------------------------------------------------
City, County & State                     5%                  5%
--------------------------------------------------------------------------------
Water & Sewer                            5%                  5%
--------------------------------------------------------------------------------
Student Loans                            4%                  4%
--------------------------------------------------------------------------------
Industrial & Pollution Control           2%                  2%
--------------------------------------------------------------------------------


--------------------------------------------------------------------------------
CREDIT RATING*                     APRIL 30, 2002     OCTOBER 31, 2001
--------------------------------------------------------------------------------
AAA/Aaa                                 67%                 67%
--------------------------------------------------------------------------------
AA/Aa                                   23%                 23%
--------------------------------------------------------------------------------
A/A                                      5%                  5%
--------------------------------------------------------------------------------
BBB/Baa                                  5%                  5%
--------------------------------------------------------------------------------

----------
*    Using the higher of Standard & Poor's, Moody's or Fitch's rating.

     We look  forward to  continuing  to manage  the Trust to  benefit  from the
opportunities  available to investors in the investment grade municipal  market.
We  thank  you for your  investment  and  continued  interest  in The  BlackRock
California  Investment Quality Municipal Trust Inc. Please feel free to call our
marketing  center at (800)  227-7BFM  (7236) if you have any specific  questions
which were not addressed in this report.

Sincerely,



/s/ Robert S. Kapito                   /s/ Kevin M. Klingert
-------------------                    ---------------------
Robert S. Kapito                       Kevin M. Klingert
Vice Chairman and Portfolio Manager    Managing Director and Portfolio Manager


                                       4


--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
--------------------------------------------------------------------------------
Symbol on American Stock Exchange:                                      RAA
--------------------------------------------------------------------------------
Initial Offering Date:                                             May 28, 1993
--------------------------------------------------------------------------------
Closing Stock Price as of 4/30/02:                                     $15.15
--------------------------------------------------------------------------------
Net Asset Value as of 4/30/02:                                       $15.07
--------------------------------------------------------------------------------
Yield on Closing Stock Price as of 4/30/02 ($15.15)(1):                5.20%
--------------------------------------------------------------------------------
Current Monthly Distribution per Share(2):                           $ 0.065625
--------------------------------------------------------------------------------
Current Annualized Distribution per Share(2):                        $ 0.7875
--------------------------------------------------------------------------------

----------

(1)  Yield on  closing  stock  price  is  calculated  by  dividing  the  current
     annualized distribution per share by the closing stock price.

(2)  The distribution is not constant and is subject to change.

                         PRIVACY PRINCIPLES OF THE TRUST

     The Trust is committed to maintaining  the privacy of  shareholders  and to
safeguarding its non-public personal  information.  The following information is
provided to help you understand  what personal  information  the Trust collects,
how we  protect  that  information  and why,  in  certain  cases,  we may  share
information with select other parties.

     Generally,  the Trust does not receive any non-public personal  information
relating to its shareholders, although certain nonpublic personal information of
its  shareholders may become available to the Trust. The Trust does not disclose
any  non-public   personal   information   about  its   shareholders  or  former
shareholders  to anyone,  except as permitted by law or as is necessary in order
to service shareholder accounts (for example, to a transfer agent or third party
administrator).

     The Trust restricts  access to non-public  personal  information  about the
shareholders  to BlackRock  employees  with a legitimate  business  need for the
information. The Trust maintains physical,  electronic and procedural safeguards
designed to protect the non-public personal information of its shareholders.


                                       5


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
PORTFOLIO OF INVESTMENTS APRIL 30, 2002 (UNAUDITED)
--------------------------------------------------------------------------------



         PRINCIPAL
          AMOUNT                                                                         OPTION CALL       VALUE
 RATING*   (000)                                   DESCRIPTION                           PROVISIONS+     (NOTE 1)
------------------------------------------------------------------------------------------------------------------
                                                                                          
                     LONG-TERM INVESTMENTS--144.9%
                     California Edl. Fac. Auth. Rev., MBIA,
AAA     $  760++      Santa Clara Univ., 5.00%, 9/01/06 ...........................          N/A         $ 839,830
AAA        835        Student Loan Prog., Ser. A, 6.00%, 3/01/16 ..................       3/07@ 102        874,738
                     California St. Hsg. Fin. Agcy. Rev., Home Mtge.,
Aa2        490        Ser. B-1, 6.45%, 2/01/11 ....................................      8/04 @ 102        511,183
Aa2        995        Ser. G, 7.20%, 8/01/14 ......................................      8/04 @ 102      1,041,088
AAA      1,000        Ser. I, Zero Coupon, 8/01/21, FSA ...........................     No Opt. Call       322,970
                     California St. Pub. Wks. Brd. Lease Rev., Ser. A,
Aaa      1,000++      Dept. of Corrections, 6.875%, 11/01/04 ......................          N/A         1,132,590
A        1,000        St. Univ. Proj., 6.10%, 10/01/06 ............................      10/04 @ 102     1,088,450
AAA      1,000++      St. Univ. Proj., 6.40%, 12/01/02, AMBAC .....................          N/A         1,047,840
                     California St., G.O.,
A+         960++      5.75%, 3/01/05 ..............................................          N/A         1,049,990
A+          40        5.75%, 3/01/19 ..............................................      3/05 @ 101         42,023
AAA      1,385       Foothill / Eastn. Trans. Agcy., Ser. A,
                      Zero Coupon, 1/01/04 ........................................     No Opt. Call     1,323,561
                     Los Angeles Cnty.,
AAA      1,000        Cmnty. Fac. Spec. Tax, Ser. A, 5.50%, 9/01/14, FSA ..........      9/07 @ 102      1,082,200
AAA      1,000++      Met. Trans. Auth. Sales Tax Rev., 6.00%, 7/01/06, MBIA ......          N/A         1,132,040
AA       1,150       Los Angeles Harbor Dept. Rev., Ser. B, 6.00%, 8/01/13 ........      8/06 @ 101      1,277,156
Aa3      1,000++     Los Angeles Pub. Wks. Fin. Auth. Rev., Regl. Park &
                      Open Space, Dist. A, 6.00%, 10/01/04 ........................          N/A         1,108,460
BBB-     1,000       Sacramento Pwr. Auth., Cogeneration Proj. Rev.,
                      6.50%, 7/01/09 ..............................................      7/06 @ 102      1,108,560
AAA        500       San Diego Ind. Dev. Rev., Ser. A, 5.90%, 6/01/18, AMBAC ......      6/03 @ 102        522,365
                     San Francisco City & Cnty.,
AAA        150        Arpt. Comn. Rev., Intl. Arpt., Ser. 12-A,
                       5.90%, 5/01/26, MBIA .......................................      5/06 @ 101        158,069
AAA      1,000        Arpt. Comn. Rev., Intl. Arpt., Ser. 6,
                       6.125%, 5/01/09, AMBAC .....................................      5/04 @ 102      1,073,640
AAA      1,000        Swr. Rev., Ser. A, 5.95%, 10/01/25, FGIC ....................      10/03 @ 102     1,042,130
                     So. California Pub. Pwr. Auth. Transm. Proj. Rev., MBIA,
AAA        380++      5.50%, 7/01/02 ..............................................          N/A           390,169
AAA        620        5.50%, 7/01/20 ..............................................     No Opt. Call       635,382
AAA        500       Temecula Valley Uni. Sch. Dist., G.O., Ser. G,
                      5.75%, 8/01/25, FGIC ........................................      8/07 @ 102        537,135
                     Univ. of California Rev.,
Aaa      1,135++      Ser. B, 6.30%, 9/01/03 ......................................          N/A         1,223,689
AAA      1,000++      Ser. D, 6.10%, 9/01/02, MBIA ................................          N/A         1,035,710
AAA        370       West Basin Mun. Wtr. Dist. Rev., C.O.P., Ser. A,
                      5.50%, 8/01/22, AMBAC .......................................      8/07 @ 101        384,626
                                                                                                        ----------



                       See Notes to Financial Statements.


                                       6


--------------------------------------------------------------------------------



                                                                                                           VALUE
                                                   DESCRIPTION                                           (NOTE 1)
------------------------------------------------------------------------------------------------------------------
                                                                                                
                     TOTAL INVESTMENTS--144.9% (COST $20,135,697) ............................          $21,985,594
                     Other assets in excess of liabilities--4.5% .............................              691,794
                     Preferred stock at redemption value, including
                       dividends payable--(49.4)% ............................................           (7,501,726)
                                                                                                        -----------
                     NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS--100% ......................          $15,175,662
                                                                                                        ===========


----------
*    Using the higher of Standard & Poor's, Moody's or Fitch's rating.
+    Date  (month/year)  and price of the earliest  optional call or redemption.
     There may be other call provisions at varying prices at later dates.
++   This bond is prefunded. See Glossary for definition.


                                                     
------------------------------------------------------------------------------------------------------
                                         KEY TO ABBREVIATIONS:
------------------------------------------------------------------------------------------------------
AMBAC  -- American Municipal Bond Assurance Corporation  FSA  -- Financial Security Assurance
C.O.P. -- Certificate of Participation                   G.O. -- General Obligation
FGIC   -- Financial Guaranty Insurance Company           MBIA -- Municipal Bond Insurance Association
-----------------------------------------------------------------------------------------------------



                       See Notes to Financial Statements.


                                       7


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 2002 (UNAUDITED)
--------------------------------------------------------------------------------

ASSETS
Investments, at value (cost $20,135,697) (Note 1) ..........  $21,985,594
Cash .......................................................      508,578
Interest receivable ........................................      294,279
Other assets ...............................................        6,469
                                                               ----------
                                                               22,794,920
                                                               ----------
LIABILITIES
Dividends payable--common stock ............................       66,090
Investment advisory fee payable (Note 2) ...................        6,495
Deferred Directors fees (Note 1) ...........................        5,521
Administration fee payable (Note 2) ........................        1,856
Other accrued expenses .....................................       37,570
                                                               ----------
                                                                  117,532
                                                               ----------
PREFERRED STOCK AT REDEMPTION VALUE
$.01 par value per share and $25,000
  liquidation value per share applicable to
  300 shares, including dividends payable
  (Note 1 & 4) .............................................    7,501,726
                                                              -----------
NET ASSETS APPLICABLE TO
COMMON SHAREHOLDERS ........................................  $15,175,662
                                                              ===========
  Composition of Net Assets Applicable
  to Common Shareholders:
  Par value (Note 4) .......................................  $    10,071
  Paid-in capital in excess of par .........................   13,897,103
  Undistributed net investment income (Note 1) .............      180,134
  Accumulated net realized loss (Note 1) ...................     (761,543)
  Net unrealized appreciation (Note 1) .....................    1,849,897
                                                              -----------
Net assets applicable to common shareholders,
  April 30, 2002 ...........................................  $15,175,662
                                                              ===========
Net asset value per share:
  ($15,175,662 / 1,007,093 shares of
  common stock issued and outstanding) .....................       $15.07
                                                                   ======

--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 2002 (UNAUDITED)
--------------------------------------------------------------------------------

NET INVESTMENT INCOME
Income
  Interest (Note 1) ...........................................  $630,328
                                                                 --------
Expenses
  Investment advisory .........................................    39,451
  Administration ..............................................    11,272
  Auction agent ...............................................     9,000
  Reports to shareholders .....................................     7,000
  Transfer agent ..............................................     6,000
  Directors ...................................................     6,000
  Independent accountants .....................................     4,000
  Legal .......................................................     3,000
  Custodian ...................................................     2,000
  Miscellaneous ...............................................    11,832
                                                                 --------
    Total expenses ............................................    99,555
                                                                 --------
Net investment income .........................................   530,773
                                                                 --------

REALIZED AND UNREALIZED LOSS
ON INVESTMENTS
Net realized loss on investments ..............................    (2,623)
Net change in unrealized appreciation
  on investments ..............................................  (319,965)
                                                                 --------
Net loss on investments .......................................  (322,588)
                                                                 --------
DIVIDENDS TO PREFERRED SHAREHOLDERS
FROM NET INVESTMENT INCOME ....................................   (46,834)
                                                                 --------

NET INCREASE IN NET ASSETS APPLICABLE
TO COMMON SHAREHOLDERS RESULTING
FROM OPERATIONS ...............................................  $161,351
                                                                 ========


                       See Notes to Financial Statements.


                                       8


--------------------------------------------------------------------------------
 THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
STATEMENTS OF CHANGES IN NET ASSETS (UNAUDITED)
--------------------------------------------------------------------------------



                                                                                        SIX MONTHS
                                                                                           ENDED           YEAR ENDED
                                                                                      APRIL 30, 2002    OCTOBER 31, 2001(1)
                                                                                      --------------    -------------------
                                                                                                  
INCREASE (DECREASE) IN ASSETS APPLICABLE TO COMMON SHAREHOLDERS

OPERATIONS:
  Net investment income ...........................................................     $    530,773       $ 1,060,522
  Net realized gain (loss) on investments .........................................           (2,623)           17,385
  Net change in unrealized appreciation on investments ............................         (319,965)          610,063
  Dividends to preferred shareholders from net investment income ..................          (46,834)         (209,155)
                                                                                         -----------       -----------
    Net increase in net assets resulting from operations ..........................          161,351         1,478,815
                                                                                         -----------       -----------
DIVIDENDS TO COMMON SHAREHOLDERS FROM NET INVESTMENT INCOME .......................         (396,489)         (792,980)
                                                                                         -----------       -----------
    Total increase (decrease) .....................................................         (235,138)          685,835
                                                                                         -----------       -----------

NET ASSETS
Beginning of period ...............................................................       15,410,800        14,724,965
                                                                                         -----------       -----------
End of period (including undistributed net investment income
  of $180,134 and $92,684, respectively) ..........................................      $15,175,662       $15,410,800
                                                                                         ===========       ===========


----------
(1)  Prior year  amounts have been  restated to conform to the current  period's
     presentation under the provisions of EITF D-98 (Note 1).


                       See Notes to Financial Statements.


                                       9


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
--------------------------------------------------------------------------------



                                                                 SIX MONTHS
                                                                    ENDED                   YEAR ENDED OCTOBER 31,(1)
                                                                  APRIL 30,   -----------------------------------------------
                                                                   2002(2)    2001(2)    2000      1999      1998      1997
                                                                   -------    -------   -------   -------   -------   -------
                                                                                                    
PER COMMON SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period(3) ........................   $ 15.30    $ 14.62   $ 14.34   $ 15.49   $ 14.77   $ 14.20
                                                                   -------    -------   -------   -------   -------   -------
Investment operations:
  Net investment income ........................................      0.53       1.05      1.06      1.05      1.05      1.07
  Net realized and unrealized gain (loss) on investments .......     (0.32)      0.63      0.29     (1.10)     0.79      0.61
  Dividends and distributions to preferred shareholders:
    Dividends from net investment income .......................     (0.05)     (0.21)    (0.25)    (0.22)    (0.24)    (0.24)
    Distributions in excess of net realized gains on investments        --         --        --        --        --           **
                                                                   -------    -------   -------   -------   -------   -------
Net increase (decrease) from investment operations .............      0.16       1.47      1.10     (0.27)     1.60      1.44
                                                                   -------    -------   -------   -------   -------   -------
Dividends and distributions to common shareholders:
  Dividends from net investment income .........................     (0.39)     (0.79)    (0.82)    (0.88)    (0.88)    (0.87)
  Distributions in excess of net realized gains on investments .        --         --        --        --        --           **
                                                                   -------    -------   -------   -------   -------   -------
Total dividends and distributions ..............................     (0.39)     (0.79)    (0.82)    (0.88)    (0.88)    (0.87)
                                                                   -------    -------   -------   -------   -------   -------
Net asset value, end of period(3) ..............................   $ 15.07    $ 15.30   $ 14.62   $ 14.34   $ 15.49   $ 14.77
                                                                   =======    =======   =======   =======   =======   =======
Market value, end of period(3) .................................   $ 15.15    $ 15.55   $ 14.00   $ 15.50   $16.125   $ 15.00
                                                                   =======    =======   =======   =======   =======   =======
TOTAL INVESTMENT RETURN(4) .....................................     (0.02)%    17.03%    (4.33)%    1.52%    13.70%    17.98%
                                                                   =======    =======   =======   =======   =======   =======
RATIOS TO AVERAGE NET ASSETS OF COMMON
  SHAREHOLDERS:(5)
Expenses .......................................................     1.32%(6)    1.38%     1.41%     1.34%     1.36%     1.32%
Net investment income before preferred stock dividends .........     7.03%(6)    7.04%     7.36%     6.95%     6.93%     7.48%
Preferred stock dividends ......................................     0.62%(6)    1.39%     1.75%     1.47%     1.60%     1.70%
Net investment income available to common shareholders .........     6.41%(6)    5.65%     5.61%     5.48%     5.33%     5.78%
SUPPLEMENTAL DATA:
Average net assets of common shareholders (000) ................   $15,230    $15,072   $14,450   $15,170   $15,265   $14,445
Portfolio turnover .............................................         4%         1%        0%        4%        0%       28%
Net assets of common shareholders, end of period (000) .........   $15,176    $15,411   $14,725   $14,439   $15,595   $14,873
Preferred stock outstanding (000) ..............................   $ 7,500    $ 7,500   $ 7,500   $ 7,500   $ 7,500   $ 7,500
Asset coverage per share of preferred stock, end of period .....   $75,591    $76,377   $74,097   $73,138   $76,990   $74,583


----------
(1)  Prior year  amounts have been  restated to conform to the current  period's
     presentation under the provisions of EITF D-98 (Note 1).
(2)  As required,  effective  November 1, 2000, the Trust adopted the provisions
     of the AICPA Audit and Accounting Guide for Investment  Companies and began
     accreting market discount on debt securities. The effect of this accounting
     policy  change  had no impact on the total  net  assets of the  Trust.  The
     effect of this  change for the six months  ended  April 30, 2002 to the net
     investment  income  and to net  realized  and  unrealized  gain  (loss)  on
     investments  were  less  than  $.005  per  common  share.  The ratio of net
     investment income before preferred stock dividends  increased from 6.99% to
     7.03% and from 6.37% to 6.41% on net investment  income available to common
     shareholders.  Per share, ratios and supplemental data for periods prior to
     2001 have not been restated to reflect this change.
(3)  Net asset value and market value are  published in BARRON'S on Saturday and
     THE WALL STREET JOURNAL on Monday.
(4)  Total  investment  return is  calculated  assuming a purchase of a share of
     common stock at the current market price on the first day and a sale at the
     current market price on the last day of the period reported.  Dividends and
     distributions,  if any, are assumed for purposes of this  calculation to be
     reinvested at prices obtained under the Trust's dividend reinvestment plan.
     Total  investment  return does not  reflect  brokerage  commissions.  Total
     investment  returns  for less  than a full  year are not  annualized.  Past
     performance is not a guarantee of future results.
(5)  Ratios are  calculated  on the basis of income and expenses  applicable  to
     both the common and preferred  shares relative to the average net assets of
     the common shareholders.
(6)  Annualized.
**   Actual  amount paid to common  shareholders  for the year ended October 31,
     1997,  was  $0.00056  per share and the  actual  amount  paid to  preferred
     shareholders was $0.00018 per common share.
The information above represents the unaudited operating  performance data for a
share of common stock outstanding, total investment return, ratio to average net
assets and other supplemental data for the periods  indicated.  This information
has been determined based upon financial  information  provided in the financial
statements and market value data for the Trust's common stock.


                       See Notes to Financial Statements.


                                       10


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)
--------------------------------------------------------------------------------

NOTE 1. ORGANIZATION & ACCOUNTING POLICIES

The BlackRock  California  Investment Quality Municipal Trust Inc. (the "Trust")
was  organized in Maryland on April 12, 1993,  as a  non-diversified  closed-end
management  investment company.  The Trust's investment  objective is to provide
high current  income  exempt from regular  Federal and  California  income taxes
consistent  with the  preservation  of  capital.  The ability of issuers of debt
securities  held by the  Trust to meet  their  obligations  may be  affected  by
economic  developments in the state, a specific industry or region. No assurance
can be given that the Trust's investment objective will be achieved.

     The following is a summary of significant  accounting  policies followed by
the Trust.

SECURITIES VALUATION:  Municipal securities  (including  commitments to purchase
such  securities  on a  "when-issued"  basis)  are valued on the basis of prices
provided  by  dealers or  pricing  services  approved  by the  Trust's  Board of
Directors.  In determining the value of a particular security,  pricing services
may use certain  information  with respect to  transactions  in such  securities
quotations from bond dealers,  market transactions in comparable  securities and
various relationships between securities. Short-term securities may be valued at
amortized  cost.  Any  securities or other assets for which such current  market
quotations  are not readily  available are valued at fair value as determined in
good faith under procedures established by and under the general supervision and
responsibility of the Trust's Board of Directors.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME:  Securities  transactions  are
recorded on trade date.  Realized and unrealized gains and losses are calculated
on the  identified  cost basis.  The Trust also  records  interest  income on an
accrual basis and amortizes  premium and accretes discount to interest income on
securities purchased using the interest method.

SEGREGATION:  In cases in which the  Investment  Company Act of 1940, as amended
and the interpretive positions of the Securities and Exchange Commission ("SEC")
require  that the  Trust  segregate  assets in  connection  with  certain  Trust
investments  (e.g., when issued  securities,  reverse  repurchase  agreements or
futures contracts), the Trust will, consistent with certain interpretive letters
issued by the SEC,  designate on its books and records cash or other liquid debt
securities  having a  market  value at least  equal  to the  amount  that  would
otherwise be required to be physically segregated.

FEDERAL  INCOME  TAXES:  It is the  Trust's  intention  to  continue to meet the
requirements  of the Internal  Revenue Code  applicable to regulated  investment
companies  and to distribute  sufficient  net income to  shareholders.  For this
reason and because  substantially  all of the Trust's  gross income  consists of
tax-exempt interest, no Federal income tax provision is required.

DIVIDENDS  AND  DISTRIBUTIONS:   The  Trust  declares  and  pays  dividends  and
distributions to common  shareholders  monthly from net investment  income,  net
realized short-term capital gains and other sources, if necessary. Net long-term
capital  gains,  if any,  in excess  of loss  carryforwards  may be  distributed
annually.  Dividends and  distributions  are recorded on the  ex-dividend  date.
Dividends and distributions to preferred shareholders are accrued and determined
as described in Note 4.

ESTIMATES: The preparation of financial statements in conformity with accounting
principles   generally  accepted  in  the  United  States  of  America  requires
management to make estimates and assumptions that affect the reported amounts of
assets and  liabilities  and disclosure of contingent  assets and liabilities at
the date of the financial  statements  and the reported  amounts of revenues and
expenses  during the reporting  period.  Actual  results could differ from those
estimates.

DEFERRED  COMPENSATION PLAN: Under a deferred  compensation plan approved by the
Board of Directors on February 24, 2000,  non-interested  Directors may elect to
defer receipt of all or a portion of their annual compensation.

     Deferred amounts earn a return as though equivalent dollar amounts had been
invested in common shares of other  BlackRock  funds  selected by the Directors.
This has the same economic  effect as if the Directors had invested the deferred
amounts in such other BlackRock funds.

     The deferred  compensation  plan is not funded and  obligations  thereunder
represent  general unsecured claims against the general assets of the Trust. The
Trust may, however,  elect to invest in common shares of those funds selected by
the Directors in order to match its deferred compensation obligations.

NEW ACCOUNTING POLICIES: As required,  effective November 1, 2000, the Trust has
adopted the provisions of the  AICPAAudit  and  Accounting  Guide for Investment
Companies,  as revised,  and began accreting market discount on debt securities.
Prior to November 1, 2000,  the Trust  amortized  premiums  and  original  issue
discount on debt  securities.  The cumulative  effect of this accounting  policy
change had no impact on the total net assets of the Trust.  This  resulted  in a
$27,769  increase to  undistributed  net investment  income and a  corresponding
decrease in net unrealized  appreciation,  based on securities held by the Trust
on October 31, 2001. The Financial  Highlights of the Trust for periods prior to
2001 have not been restated to reflect this change.


     The effect of this change for the six months ended April 30,  2002,  was to
increase net investment income by $2,741;  decrease net unrealized  appreciation
by $118 and decrease net realized gains by $2,623.

CHANGE IN FINANCIAL  STATEMENT  CLASSIFICATION  FOR AMPS: In accordance with the
provisions  of  EITF  D-98,   "Classification   and  Measurement  of  Redeemable
Securities," effective for the cur-


                                       11

rent period,  the Trust has  reclassified  its Auction Market  Preferred  Shares
("AMPS")  outside of permanent equity in the Net Assets section of the Statement
of Assets and Liabilities.  In addition,  distributions to AMPS shareholders are
now  classified as a component of net assets  resulting  from  operations on the
statement  of  operations  and changes in net assets and as a  component  of the
investment operations in the financial highlights.  Prior year amounts presented
have been restated to conform to this period's presentation.  This change has no
impact on the net assets applicable to common shares of the Trust.

NOTE 2. AGREEMENTS

The Trust has an Investment  Advisory  Agreement with BlackRock  Advisors,  Inc.
(the "Advisor"), a wholly-owned subsidiary of BlackRock,  Inc., which in turn is
an indirect majority-owned  subsidiary of PNC Financial Services Group, Inc. The
Trust has an Administration Agreement with Prudential Investments LLC ("PI"), an
indirect, wholly-owned subsidiary of Prudential Financial, Inc.

     The  investment  advisory  fee paid to the Advisor is  computed  weekly and
payable  monthly at an annual  rate of 0.35% of the Trust's  average  weekly net
investment  assets.  Net  investment  assets mean the total  assets of the Trust
(including  any  assets  attributable  to  any  preferred  shares  that  may  be
outstanding) minus the sum of accrued  liabilities (other than debt representing
financial leverage). The liquidation preference of the preferred shares is not a
liability.  The total dollar  amounts paid to the Advisor by the Trust under the
Investment  Advisory  Agreement  for the six months ended April 30, 2002 and the
years ended October 31, 2001, 2000 and 1999 were $39,451,  $79,219,  $77,246 and
$80,508, respectively. The administration fee paid to PI is also computed weekly
and payable monthly at an annual rate of 0.10% of the Trust's average weekly net
investment  assets.  The total dollar  amounts paid to PI by the Trust under the
Administration  Agreement  for the six months ended April 30, 2002 and the years
ended  October  31,  2001,  2000 and 1999 were  $11,272,  $22,634,  $22,070  and
$23,000, respectively.

     Pursuant to the agreements,  the Advisor provides continuous supervision of
the investment  portfolio and pays the compensation of officers of the Trust who
are affiliated  persons of the Advisor.  PI pays occupancy and certain  clerical
and accounting costs of the Trust. The Trust bears all other costs and expenses,
which  include  reimbursements  to the Advisor for certain  operational  support
services  provided to the Trust.

NOTE 3. PORTFOLIO SECURITIES

     Purchases  and  sales  of  investment   securities  other  than  short-term
investments,  for the six months ended April 30, 2002,  aggregated  $908,348 and
$1,018,348, respectively.

     The Federal income tax basis of the Trust's  investments at April 30, 2002,
was  $20,107,810,  and accordingly,  net and gross  unrealized  appreciation was
$1,877,784.

     For Federal income tax purposes,  the Trust had a capital loss carryforward
at October  31,  2001,  of  approximately  $756,000  which will  expire in 2002.
Accordingly, no capital gain distribution is expected to be paid to shareholders
until net gains have been realized in excess of such amount.

NOTE 4. CAPITAL

There are 200 million  shares of $.01 par value  common  stock  authorized.  The
Trust may classify or reclassify any unissued shares of common stock into one or
more  series of  preferred  stock.  Of the  1,007,093  shares  of  common  stock
outstanding at April 30, 2002,  the Advisor owned 7,093 shares.  As of April 30,
2002, there were 300 shares of preferred stock Series W7 outstanding.

     Dividends on Series W7 are cumulative at a rate which is reset every 7 days
based on the results of an auction.  Dividend  rates  ranged from 1.00% to 1.55%
during the six months ended April 30, 2002.

     The Trust may not declare dividends or make other  distri-butions on common
shares  or  purchase  any  such  shares  if,  at the  time  of the  declaration,
distribution  or  purchase,  asset  coverage  with  respect  to the  outstanding
preferred stock would be less than 200%.

     The preferred  stock is redeemable at the option of the Trust,  in whole or
in part, on any dividend  payment date at $25,000 per share plus any accumulated
or unpaid dividends whether or not declared. The preferred stock is also subject
to  mandatory  redemption  at $25,000 per share plus any  accumulated  or unpaid
dividends,  whether or not  declared,  if certain  requirements  relating to the
composition  of the  assets  and  liabilities  of the  Trust as set forth in the
Articles of Incorporation are not satisfied.

     The holders of preferred  stock have voting  rights equal to the holders of
common stock (one vote per share) and will vote  together with holders of shares
of common stock as a single class. However,  holders of preferred stock are also
entitled to elect two of the Trust's  Directors.  In  addition,  the  Investment
Company Act of 1940 requires that along with approval by stockholders that might
otherwise  be  required,  and the  approval  of the holders of a majority of any
outstanding  preferred stock,  voting separately as a class would be required to
(a) adopt any plan of  reorganization  that would adversely affect the preferred
stock and (b) take any action requiring a vote of security  holders,  including,
among other  things,  changes in the Trust's  subclassification  as a closed-end
investment  company  or  changes  in its  fundamental  investment  restrictions.

NOTE 5. DIVIDENDS

Subsequent  to April 30, 2002,  the Board of  Directors of the Trust  declared a
dividend from undistributed  earnings of $0.065625 per common stock payable June
3, 2002, to shareholders of record on May 15, 2002.

     For the period May 1, 2002 to May 31, 2002, dividends declared on preferred
stock totaled $8,966.
                                       12


--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                           DIVIDEND REINVESTMENT PLAN
--------------------------------------------------------------------------------

     Pursuant to the Trust's  Dividend  Reinvestment  Plan (the "Plan"),  common
shareholders are  automatically  enrolled to have all distributions of dividends
and capital gains reinvested by EquiServe Trust Company, N.A. (the "Plan Agent")
in Trust shares pursuant to the Plan.  Shareholders who elect not to participate
in the Plan will  receive  all  distributions  in cash paid by check and  mailed
directly to the  shareholders  of record (or if the shares are held in street or
other nominee name, then to the nominee) by the Plan Agent.

     The Plan Agent serves as agent for the  shareholders in  administering  the
Plan.  After the Trust  declares a dividend or determines to make a capital gain
distribution,  the Plan Agent will, as agent for the  participants,  receive the
cash  payment and use it to buy Trust  shares in the open market on the American
Stock Exchange or elsewhere,  for the participants' accounts. The Trust will not
issue any new shares under the Plan.

     Participants  in the Plan may withdraw from the Plan upon written notice to
the Plan Agent and will receive  certificates  for whole Trust shares and a cash
payment for any fraction of a Trust share.

     The Plan Agent's fees for the handling of the reinvestment of dividends and
distributions  will be paid by the Trust.  However,  each participant will pay a
pro rata  share of  brokerage  commissions  incurred  with  respect  to the Plan
Agent's open market  purchases in connection with the  reinvestment of dividends
and  distributions.  The automatic  reinvestment of dividends and  distributions
will not relieve  participants  of any Federal income tax that may be payable on
such dividends or distributions.

     The Trust  reserves the right to amend or terminate  the Plan as applied to
any dividend or  distribution  paid  subsequent to written  notice of the change
sent to all  shareholders  of the Trust at least 90 days  before the record date
for the dividend or distribution.  The Plan also may be amended or terminated by
the Plan Agent upon at least 90 days' written notice to all  shareholders of the
Trust.  All  correspondence  concerning  the Plan should be directed to the Plan
Agent at (800) 699-1BFM. The address is on the back of this report.


                                       13


--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                             ADDITIONAL INFORMATION
--------------------------------------------------------------------------------

     There have been no material changes in the Trust's investment objectives or
policies  that have not been approved by the  shareholders  or to its charter or
by-laws or in the  principal  risk factors  associated  with  investment  in the
Trust.  There have been no changes in the persons who are primarily  responsible
for the day-to-day management of the Trust's portfolio.

     Quarterly  performance  and other  information  regarding  the Trust may be
found    on    BlackRock's     website,     which    can    be    accessed    at
http://www.blackrock.com/funds/cefunds.html.   This   reference  to  BlackRock's
website is intended to allow  investors  public access to quarterly  information
regarding the Trust and is not intended to incorporate  BlackRock's website into
this report.

The  Annual  Meeting  of  Shareholders  was  held  May  23,  2002 to vote on the
following matter:

To elect three Directors as follows:


DIRECTOR:                                        CLASS     TERM      EXPIRING
---------                                        -----     -----      -------
Frank J. Fabozzi .............................    II      3 years      2005
Walter F. Mondale ............................    II      3 years      2005
Ralph L. Schlosstein .........................    II      3 years      2005

     Directors whose term of office  continues beyond this meeting are Andrew F.
Brimmer, Richard E. Cavanagh, Kent Dixon, Laurence D. Fink and James Clayburn La
Force, Jr.

     Shareholders elected the three Directors. The results of the voting were as
follows:

                                    VOTES FOR*    VOTES AGAINST*  ABSTENTIONS*
                                    ---------     -------------   ------------
Frank J. Fabozzi ................          293          --                2
Walter F. Mondale ...............      645,672          --           17,439
Ralph L. Schlosstein ............      647,719          --           15,392

----------
*    The votes represent  common and preferred  shareholders  voting as a single
     class  except  for Frank J.  Fabozzi  who was voted on and  elected  by the
     preferred shareholders only.

     Laurence D. Fink,  Chairman of the Trust's Board of Directors,  and certain
of the officers of the Trust listed on the cover of this Report to Shareholders,
are also officers of the Advisor. They serve in the following capacities for the
Advisor:    Laurence    D.    Fink--Chief    Executive    Officer,    Ralph   L.
Schlosstein--Director  and  President,   Robert  S.  Kapito--Director  and  Vice
Chairman,   Kevin   M.   Klingert--Director   and   Managing   Director,   Henry
Gabbay--Managing Director, and Anne Ackerley--Managing Director.


                                       14


--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                               INVESTMENT SUMMARY
--------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE

The  BlackRock  California   Investment  Quality  Municipal  Trust's  investment
objective  is to provide  high current  income  exempt from regular  Federal and
California income taxes consistent with the preservation of capital.

WHO MANAGES THE TRUST?

BlackRock  Advisors,  Inc. (the "Advisor")  manages the Trust.  The Advisor is a
wholly-owned subsidiary of BlackRock,  Inc.  ("BlackRock"),  which is one of the
largest  publicly traded  investment  management firms in the United States with
$238 billion of assets under management as of March 31, 2002.  BlackRock manages
assets on behalf of institutional and individual  investors  worldwide through a
variety of equity, fixed income,  liquidity and alternative investment products,
including the BLACKROCK FUNDS and BLACKROCK  PROVIDENT  INSTITUTIONAL  FUNDS. In
addition,  BlackRock  provides  risk  management  advice and  investment  system
services to a growing  number of  institutional  investors  under the  BLACKROCK
SOLUTIONS name.  Clients are served from the Company's  headquarters in New York
City, as well as offices in Boston, Edinburgh,  Hong Kong, San Francisco,  Tokyo
and Wilmington. BlackRock is a member of The PNC Financial Services Group (NYSE:
PNC), and is majority-owned by PNC and by BlackRock employees.

WHAT CAN THE TRUST INVEST IN?

Under normal  conditions,  the Trust expects to continue to manage its assets so
that at  least  80% of its  investments  are  rated at  least  investment  grade
("BBB"by Standard & Poor's or "Baa" by Moody's Investor  Services) and up to 20%
of its assets may instead be deemed to be of  equivalent  credit  quality by the
Advisor.  The Trust  intends  to  invest  substantially  all of the  assets in a
portfolio of investment grade California  Municipal  Obligations,  which include
debt  obligations   issued  by  or  on  behalf  of  California,   its  political
subdivisions,  agencies and  instrumentalities  and by other qualifying  issuers
that pay interest  which,  in the opinion of the bond counsel of the issuer,  is
exempt from regular Federal and California  income taxes.  California  Municipal
Obligations are issued to obtain funds for various public  functions,  including
the   construction  of  public   facilities,   the  refinancing  of  outstanding
obligations, the obtaining of funds for general operating expenses and for loans
to other public institutions and facilities.

WHAT IS THE ADVISOR'S INVESTMENT STRATEGY?

The Advisor will manage the assets of the Trust,  in accordance with the Trust's
investment  objective and policies to seek to achieve its objective by investing
in  investment  grade  California  Municipal  Obligations  or  other  qualifying
issuers.  As such, the Advisor actively manages the assets in relation to market
conditions  and  interest  rate  changes.   Depending  on  yield  and  portfolio
allocation  considerations,  the  Advisor  may choose to invest a portion of the
Trust's   assets  in   securities   which  pay  interest   that  is  subject  to
AMT(alternative  minimum  tax).  The Trust intends to emphasize  investments  in
California  municipal  obligations  with  long-term  maturities  and  expects to
maintain an average portfolio  maturity of 15-20 years, but the average maturity
may be shortened or lengthened from time to time depending on market conditions.

Under current market conditions the use of leverage  increases the income earned
by the Trust.  The Trust  employs  leverage  primarily  through the  issuance of
preferred  stock.   Preferred  stockholders  will  receive  dividends  based  on
short-term rates in exchange for allowing the Trust to borrow additional assets.
These assets will be invested in longer-term assets which typically offer higher
interest  rates and the  difference  between the cost of the  dividends  paid to
preferred  stockholders  and the interest earned on the  longer-term  securities
will provide higher income levels for common  stockholders in most interest rate
environments. See "Leverage Considerations in the Trust".


                                       15


HOW ARE THE TRUST'S SHARES PURCHASED AND SOLD?
DOES THE TRUST PAY DIVIDENDS REGULARLY?

The  Trust's  common  shares are traded on the  American  Stock  Exchange  which
provides investors with liquidity on a daily basis. Orders to buy or sell shares
of the Trust must be placed  through a registered  broker or financial  advisor.
The Trust pays monthly  dividends which are typically paid on the first business
day of the month. For shares held in the  shareholder's  name,  dividends may be
reinvested  in  additional  shares  of the Trust  through  its  transfer  agent,
EquiServe Trust Company,  N.A.  Investors who wish to hold shares in a brokerage
account  should check with their  financial  advisor to determine  whether their
brokerage firm offers dividend reinvestment services.

LEVERAGE CONSIDERATIONS IN THE TRUST

The Trust employs  leverage  primarily  through the issuance of preferred stock.
Leverage permits the Trust to borrow money at short-term rates and reinvest that
money in longer-term  assets,  which typically offer higher interest rates.  The
difference  between the cost of the borrowed  funds and the income earned on the
proceeds  that are  invested in  longer-term  assets is the benefit to the Trust
from leverage.

Leverage  increases  the duration (or price  sensitivity  of the net assets with
respect to changes  in  interest  rates) of the  Trust,  which can  improve  the
performance  of the Trust in a  declining  rate  environment,  but can cause net
assets to decline  faster  than the  market in a rapidly  rising  interest  rate
environment. The Advisor's portfolio managers continuously monitor and regularly
review the  Trust's use of leverage  and the Trust may  reduce,  or unwind,  the
amount of leverage  employed should the Advisor consider that reduction to be in
the best interests of the shareholders.

SPECIAL CONSIDERATIONS AND RISK FACTORS RELEVANT TO THE TRUST

THE TRUST IS  INTENDED  TO BE A  LONG-TERM  INVESTMENT  AND IS NOT A  SHORT-TERM
TRADING VEHICLE.

INVESTMENT  OBJECTIVE.  Although  the  objective of the Trust is to provide high
current  income  exempt  from  regular  Federal  and  California   income  taxes
consistent with the preservation of capital, there can be no assurance that this
objective will be achieved.

DIVIDEND  CONSIDERATIONS.  The income and dividends paid by the Trust are likely
to vary over time as fixed income market conditions change. Future dividends may
be higher or lower than the dividend the Trust is currently paying.

LEVERAGE.  The Trust utilizes  leverage through the issuance of preferred stock,
which involves  special risks.  The Trust's net asset value and market value may
be more volatile due to its use of leverage.

MARKET PRICE OF SHARES.  The shares of closed-end  investment  companies such as
the Trust trade on the American Stock  Exchange  (AMEX symbol:  RAA) and as such
are subject to supply and demand influences.  As a result, shares may trade at a
discount or a premium to their net asset value.

MUNICIPAL  OBLIGATIONS.  The value of municipal debt securities generally varies
inversely with changes in prevailing  market  interest  rates.  Depending on the
amount of call  protection  that the securities in the Trust have, the Trust may
be subject to certain  reinvestment  risks in environments of declining interest
rates.

ILLIQUID  SECURITIES.  The Trust may  invest in  securities  that are  illiquid,
although  under current  market  conditions the Trust expects to do so to only a
limited extent. These securities involve special risks.

ANTITAKEOVER  PROVISIONS.  Certain antitakeover provisions will make a change in
the Trust's  business or management  more difficult  without the approval of the
Trust's Board of Directors and may have the effect of depriving  shareholders of
an  opportunity  to sell their shares at a premium above the  prevailing  market
price.

ALTERNATIVE  MINIMUM TAX (AMT).  The Trust may invest in  securities  subject to
alternative minimum tax.


                                       16


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        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                                    GLOSSARY
--------------------------------------------------------------------------------

CLOSED-END FUND:          Investment  vehicle  which  initially  offers  a fixed
                          number of shares and trades on a stock  exchange.  The
                          Trust   invests  in  a  portfolio  of   securities  in
                          accordance with its stated  investment  objectives and
                          policies.

DISCOUNT:                 When a Trust's  net asset  value is  greater  than its
                          market  price  the  Trust is said to be  trading  at a
                          discount.

DIVIDEND:                 Income  generated  by  securities  in a portfolio  and
                          distributed  to  shareholders  after the  deduction of
                          expenses.  This Trust  declares and pays  dividends to
                          common shareholders on a monthly basis.

DIVIDEND REINVESTMENT:    Common   shareholders   may  have  all  dividends  and
                          distributions    of   capital   gains    automatically
                          reinvested into additional shares of the Trust.

MARKET PRICE:             Price per share of a security trading in the secondary
                          market.  For a closed-end  Trust, this is the price at
                          which  one  share of the  Trust  trades  on the  stock
                          exchange. If you were to buy or sell shares, you would
                          pay or receive the market price.

NET ASSET VALUE (NAV):    Net  asset  value  is the  total  market  value of all
                          securities   and  other  assets  held  by  the  Trust,
                          including income accrued on its investments, minus any
                          liabilities including accrued expenses, divided by the
                          total number of outstanding  common shares.  It is the
                          underlying  value of a single  common share on a given
                          day.  Net  asset  value  for the  Trust is  calculated
                          weekly and  published  in BARRON'S on Saturday and THE
                          WALL STREET JOURNAL on Monday.

PREMIUM:                  When a Trust's  market  price is greater  than its net
                          asset  value,  the  Trust is said to be  trading  at a
                          premium.

PREREFUNDED BONDS:        These securities are collateralized by U.S. Government
                          securities  which are held in  escrow  and are used to
                          pay principal and interest on the tax exempt issue and
                          retire  the  bond  in  full  at  the  date  indicated,
                          typically at a premium to par.


                                       17


--------------------------------------------------------------------------------
                            BLACKROCK ADVISORS, INC.
                           SUMMARY OF CLOSED-END FUNDS
--------------------------------------------------------------------------------

TAXABLE TRUSTS
--------------------------------------------------------------------------------
                                                                STOCK  MATURITY
PERPETUAL TRUSTS                                                SYMBOL   DATE
                                                                 -----   -----
The BlackRock Income Trust Inc.                                  BKT      N/A
The BlackRock North American Government Income Trust Inc.        BNA      N/A
The BlackRock High Yield Trust                                   BHY      N/A
BlackRock Core Bond Trust                                        BHK      N/A
BlackRock Strategic Bond Trust                                   BHD      N/A

TERM TRUSTS
The BlackRock Strategic Term Trust Inc.                          BGT     12/02
The BlackRock Investment Quality Term Trust Inc.                 BQT     12/04
The BlackRock Advantage Term Trust Inc.                          BAT     12/05
The BlackRock Broad Investment Grade 2009 Term Trust Inc.        BCT     12/09

TAX-EXEMPT TRUSTS
--------------------------------------------------------------------------------
                                                                STOCK  MATURITY
PERPETUAL TRUSTS                                                SYMBOL   DATE
                                                                 -----   -----
The BlackRock Investment Quality Municipal Trust Inc.            BKN      N/A
The BlackRock California Investment Quality Municipal Trust Inc. RAA      N/A
The BlackRock Florida Investment Quality Municipal Trust         RFA      N/A
The BlackRock New Jersey Investment Quality Municipal Trust Inc. RNJ      N/A
The BlackRock New York Investment Quality Municipal Trust Inc.   RNY      N/A
The BlackRock Pennsylvania Strategic Municipal Trust             BPS      N/A
The BlackRock Strategic Municipal Trust                          BSD      N/A
BlackRock California Municipal Income Trust                      BFZ      N/A
BlackRock Municipal Income Trust                                 BFK      N/A
BlackRock New York Municipal Income Trust                        BNY      N/A
BlackRock New Jersey Municipal Income Trust                      BNJ      N/A
BlackRock Florida Municipal Income Trust                         BBF      N/A
BlackRock New York Municipal Bond Trust                          BQH      N/A
BlackRock Virginia Municipal Bond Trust                          BHV      N/A
BLackrock Florida Municipal Bond Trust                           BIE      N/A
BlackRock Municipal Bond Trust                                   BBK      N/A
BlackRock Maryland Municipal Bond Trust                          BZM      N/A
BlackRock New Jersey Municipal Bond Trust                        BLJ      N/A
BlackRock California Municipal Bond Trust                        BZA      N/A

TERM TRUSTS
The BlackRock Municipal Target Term Trust Inc.                   BMN     12/06
The BlackRock Insured Municipal 2008 Term Trust Inc.             BRM     12/08
The BlackRock California Insured Municipal 2008 Term Trust Inc.  BFC     12/08
The BlackRock Florida Insured Municipal 2008 Term Trust          BRF     12/08
The BlackRock New York Insured Municipal 2008 Term Trust Inc.    BLN     12/08
The BlackRock Insured Municipal Term Trust Inc.                  BMT     12/10
BlackRock California Municipal 2018 Term Trust                   BJZ     12/18
BlackRock New York Municipal 2018 Term Trust                     BLH     12/18
BlackRock Municipal 2018 Term Trust                              BPK     12/18

 IF YOU WOULD LIKE FURTHER INFORMATION PLEASE DO NOT HESITATE TO CALL BLACKROCK
        AT (800) 227-7BFM (7236) OR CONSULT WITH YOUR FINANCIAL ADVISOR.


                                       18


--------------------------------------------------------------------------------
                            BLACKROCK ADVISORS, INC.
                                   AN OVERVIEW
--------------------------------------------------------------------------------

     BlackRock Advisors,  Inc. (the "Advisor") manages the Trust. The Advisor is
a wholly-owned subsidiary of BlackRock, Inc. ("BlackRock"),  which is one of the
largest  publicly traded  investment  management firms in the United States with
$238 billion of assets under management as of March 31, 2002.  BlackRock manages
assets on behalf of institutional and individual  investors  worldwide through a
variety of equity, fixed income,  liquidity and alternative investment products,
including the BLACKROCK FUNDS and BLACKROCK  PROVIDENT  INSTITUTIONAL  FUNDS. In
addition,  BlackRock  provides  risk  management  advice and  investment  system
services to a growing  number of  institutional  investors  under the  BLACKROCK
SOLUTIONS name.  Clients are served from the Company's  headquarters in New York
City, as well as offices in Boston, Edinburgh,  Hong Kong, San Francisco,  Tokyo
and Wilmington. BlackRock is a member of The PNC Financial Services Group (NYSE:
PNC), and is majority-owned by PNC and by BlackRock employees.

     BlackRock's fixed income product was introduced in 1988 by a team of highly
seasoned  fixed  income   professionals.   These   professionals  had  extensive
experience   creating,   analyzing   and  trading  a  variety  of  fixed  income
instruments,  including the most complex structured securities. In fact, several
individuals  at BlackRock  were  responsible  for  developing  many of the major
innovations  in  the  mortgage-backed   and  asset-backed   securities  markets,
including   the  creation  of  the  first  CMO,  the  floating   rate  CMO,  the
senior/subordinated pass-through and the multi-class asset-backed security.

     BlackRock  is unique  among  asset  management  and  advisory  firms in the
emphasis it places on the  development of proprietary  analytical  capabilities.
Over one  quarter of the  firm's  professionals  are  dedicated  to the  design,
maintenance  and use of these  systems,  which are not  otherwise  available  to
investors. BlackRock's proprietary analytical tools are used for evaluating, and
designing fixed income investment  strategies for client portfolios.  Securities
purchased include mortgages,  corporate bonds,  municipal bonds and a variety of
hedging instruments.

     BlackRock  has  developed  investment  products  that respond to investors'
needs and has been  responsible  for several  major  innovations  in  closed-end
funds. In fact,  BlackRock  introduced the first  closed-end  mortgage fund, the
first taxable and tax-exempt  closed-end funds to offer a finite term, the first
closed-end  fund to  achieve a AAA rating by  Standard  & Poor's,  and the first
closed-end  fund to invest  primarily in North American  Government  securities.
Currently,  BlackRock's  closed-end funds have dividend reinvestment plans, some
of which are designed to provide  ongoing  demand for the stock in the secondary
market.  BlackRock  manages a wide range of  investment  vehicles,  each  having
specific investment objectives and policies.

     In view of our  continued  desire to provide a high level of service to all
our shareholders, BlackRock maintains a toll-free number for your questions. The
number is (800) 227-7BFM (7236).  We encourage you to call us with any questions
that you may have about your BlackRock  funds and we thank you for the continued
trust that you place in our abilities.


                                       19

--------------------------------------------------------------------------------

                                   BLACKROCK

--------------------------------------------------------------------------------

DIRECTORS
Laurence D. Fink, CHAIRMAN
Andrew F. Brimmer
Richard E. Cavanagh
Kent Dixon
Frank J. Fabozzi
James Clayburn La Force, Jr.
Walter F. Mondale
Ralph L. Schlosstein

OFFICERS
Ralph L. Schlosstein, PRESIDENT
Robert S. Kapito, VICE PRESIDENT
Kevin M. Klingert, VICE PRESIDENT
Richard  M.  Shea,  VICE  PRESIDENT/TAX
Henry  Gabbay,  TREASURER
James  Kong, ASSISTANT  TREASURER
Anne  Ackerley,  SECRETARY

INVESTMENT  ADVISOR
BlackRock
Advisors, Inc.
100 Bellevue Parkway
Wilmington, DE 19809
(800) 227-7BFM

ADMINISTRATOR
Prudential Investments LLC
Gateway Center Three
100 Mulberry Street
Newark, NJ 07102-4077

CUSTODIAN
State Street Bank and Trust Company
1 Heritage Drive
North Quincy, MA 02171

TRANSFER AGENT
EquiServe Trust Company, N.A.
150 Royall Street
Canton, MA 02021
(800) 699-1BFM

AUCTION AGENT
Deutsche Bank
4 Albany Street
New York, NY 10006

INDEPENDENT ACCOUNTANTS
Deloitte & Touche LLP
200 Berkeley Street
Boston, MA 02116

LEGAL COUNSEL
Skadden, Arps, Slate, Meagher & Flom LLP
4 Times Square
New York, NY 10036

LEGAL COUNSEL -- INDEPENDENT DIRECTORS
Debevoise & Plimpton
919 Third Avenue
New York, NY 10022

     The accompanying financial statements as of April 30, 2002 were not audited
and accordingly, no opinion is expressed on them.

     This  report  is for  shareholder  information.  This  is not a  prospectus
intended for use in the purchase or sale of any securities.

     Statements and other information  contained in this report are as dated and
are subject to change.

                       THE BLACKROCK CALIFORNIA INVESTMENT
                          QUALITY MUNICIPAL TRUST INC.
                         c/o Prudential Investments LLC
                              Gateway Center Three
                               100 Mulberry Street
                              Newark, NJ 07102-4077
                                 (800) 227-7BFM

                                                                     09247U-10-7
[LOGO] Printed on recycled paper                                     09247U-20-6

THE BLACKROCK
CALIFORNIA
INVESTMENT QUALITY
MUNICIPAL TRUST INC.
--------------------------------------------------------------------------------
SEMI-ANNUAL REPORT
APRIL 30, 2002

[LOGO](SM) BLACKROCK