<PAGE> PAGE 1
000 B000000 10/31/97
000 C000000 0000902722
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNI
001 B000000 811-7664
001 C000000 9733677503
002 A000000 GATEWAY CENTER THREE, 100 MULBERRY ST
002 B000000 NEWARK
002 C000000 NJ
002 D010000 07102
002 D020000 4077
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 BLACKROCK FINANCIAL MANAGEMENT, INC.
008 B000001 A
008 C000001 801-32183
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10154
010 A000001 PRUDENTIAL INVESTMENTS FUND MANAGEMENT LLC
010 B000001 811-31104
010 C010001 NEWARK
010 C020001 NJ
010 C030001 07102
010 C040001 4077
011 A000001 COWEN & COMPANY
011 B000001 8-1682
011 C010001 NEW YORK
011 C020001 NY
011 C030001 00000
011 A000002 CROWELL, WEEDON & CO.
<PAGE> PAGE 2
011 B000002 8-3710
011 C010002 LOS ANGELES
011 C020002 CA
011 C030002 90017
011 A000003 KEMPER SECURITIES, INC.
011 B000003 8-37180
011 C010003 NEW YORK
011 C020003 NY
011 C030003 00000
011 A000004 SUTRO & CO. INC.
011 B000004 8-15491
011 C010004 NEW YORK
011 C020004 NY
011 C030004 00000
012 A000001 BOSTON EQUISERVE L.P.
012 B000001 84-0000000
012 C010001 CANTON
012 C020001 MA
012 C030001 02021
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10281
013 B040001 1434
015 A000001 STATE STREET BANK & TRUST CO.
015 B000001 C
015 C010001 NORTH QUINCY
015 C020001 MA
015 C030001 02171
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 28
019 C000000 BLACKROCK.
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 PAINEWEBBER, INC.
022 B000001 13-2638166
022 C000001 4423
022 D000001 1878
022 A000002 SMITH BARNEY, INC.
022 B000002 13-1912900
<PAGE> PAGE 3
022 C000002 734
022 D000002 2006
022 A000003 PRAGER, MCCARTHY & SEALY, INC.
022 C000003 1943
022 D000003 0
022 A000004 ABN AMRO SECURITIES, INC.
022 B000004 13-3227945
022 C000004 0
022 D000004 1649
022 A000005 MORGAN (J.P.) SECURITIES, INC.
022 B000005 13-3224016
022 C000005 1000
022 D000005 0
022 A000006 BRADFORD (J.C.) & CO.
022 B000006 62-0136910
022 C000006 925
022 D000006 0
022 A000007 LEHMAN BROTHERS, INC.
022 B000007 13-2518466
022 C000007 0
022 D000007 788
022 A000008 MERRILL LYNCH, PIERCE, FENNER & SMITH, INC.
022 B000008 13-5674085
022 C000008 300
022 D000008 0
022 C000009 0
022 D000009 0
022 C000010 0
022 D000010 0
023 C000000 9325
023 D000000 6321
024 000000 N
025 D000001 0
025 D000002 0
025 D000003 0
025 D000004 0
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
<PAGE> PAGE 4
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0
028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
<PAGE> PAGE 5
048 000000 0.350
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 N
054 N000000 N
054 O000000 N
055 A000000 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 N
060 B000000 N
<PAGE> PAGE 6
061 000000 0
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.7
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 146.6
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 8.3
064 A000000 N
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 Y
070 I020000 N
070 J010000 Y
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 N
<PAGE> PAGE 7
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000 5928
071 B000000 6342
071 C000000 21487
071 D000000 28
072 A000000 12
072 B000000 1272
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 77
072 G000000 22
072 H000000 0
072 I000000 7
072 J000000 3
072 K000000 0
072 L000000 17
072 M000000 12
072 N000000 0
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 7
072 S000000 7
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 39
072 X000000 191
072 Y000000 0
072 Z000000 1081
072AA000000 57
072BB000000 56
072CC010000 0
072CC020000 619
072DD010000 0
072DD020000 0
072EE000000 0
073 A010000 1.1100
<PAGE> PAGE 8
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 185
074 B000000 0
074 C000000 100
074 D000000 21815
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 310
074 M000000 1
074 N000000 22411
074 O000000 0
074 P000000 9
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 29
074 S000000 7500
074 T000000 14873
074 U010000 1007
074 U020000 0
074 V010000 14.77
074 V020000 0.00
074 W000000 0.0000
074 X000000 65
074 Y000000 0
075 A000000 0
075 B000000 14279
076 000000 15.00
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
<PAGE> PAGE 9
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078 000000 N
080 A000000 VIGILANT INSURANCE CO-MEMBER OF THE CHUBB GRP
080 C000000 20200
081 A000000 Y
081 B000000 28
082 A000000 Y
082 B000000 25
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 1007
086 A020000 14011
086 B010000 0
086 B020000 0
086 C010000 150
086 C020000 7312
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 COMMON STOCK
087 A020000 092-470107
087 A030000 RAA
087 B010000 PREFERRED STOCK
087 B020000 092-470206
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE HENRY GABBAY
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000902722
<NAME> THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> Oct-31-1997
<PERIOD-END> Oct-31-1997
<INVESTMENTS-AT-COST> 20,276,679
<INVESTMENTS-AT-VALUE> 21,915,175
<RECEIVABLES> 310,140
<ASSETS-OTHER> 185,301
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 22,410,616
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 37,142
<TOTAL-LIABILITIES> 37,142
<SENIOR-EQUITY> 7,500,000
<PAID-IN-CAPITAL-COMMON> 13,907,174
<SHARES-COMMON-STOCK> 1,007,093
<SHARES-COMMON-PRIOR> 1,007,093
<ACCUMULATED-NII-CURRENT> 146,509
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (818,705)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,638,496
<NET-ASSETS> 14,873,474
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,272,163
<OTHER-INCOME> 0
<EXPENSES-NET> 191,214
<NET-INVESTMENT-INCOME> 1,080,949
<REALIZED-GAINS-CURRENT> 1,100
<APPREC-INCREASE-CURRENT> 618,624
<NET-CHANGE-FROM-OPS> 1,700,673
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,122,531)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (750)
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 577,392
<ACCUMULATED-NII-PRIOR> 142,925
<ACCUMULATED-GAINS-PRIOR> (825,314)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 77,035
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 191,214
<AVERAGE-NET-ASSETS> 14,445,000
<PER-SHARE-NAV-BEGIN> 14.20
<PER-SHARE-NII> 1.07
<PER-SHARE-GAIN-APPREC> 0.61
<PER-SHARE-DIVIDEND> (1.11)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 14.77
<EXPENSE-RATIO> 1.32
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
For the annual period ended October 31, 1997
File number 811-7664
SUB-ITEM 77C
Submission of Matters to a Vote of Security Holders
An Annual Meeting of Shareholders was held on
April 15, 1997. At such meeting the shareholders
approved the selection of auditors and the
election of directors. Pursuant to Instruction 2
to this Sub-Item, information as to these matters
has not been included in this Attachment.
To the Shareholders and Board of Directors of
The BlackRock California Investment Quality
Municipal Trust, Inc.:
In planning and performing our audit of the
financial statements of The BlackRock California
Investment Quality Municipal Trust, Inc. (the
"Trust") for the year ended October 31, 1997 (on
which we have issued our report dated December 12,
1997), we considered its internal control
structure, including procedures for safeguarding
securities, in order to determine our auditing
procedures for the purpose of expressing our
opinion on the financial statements and to comply
with the requirements of Form N-SAR, not to
provide assurance on the internal control
structure.
The management of the Trust is responsible for
establishing and maintaining an internal control
structure. In fulfilling this responsibility,
estimates and judgments by management are required
to assess the expected benefits and related costs
of internal control structure policies and
procedures. Two of the objectives of an internal
control structure are to provide management with
reasonable, but not absolute, assurance that
assets are safeguarded against loss from
unauthorized use or disposition and that
transactions are executed in accordance with
management's authorization and recorded properly
to permit preparation of financial statements in
conformity with generally accepted accounting
principles.
Because of inherent limitations in any internal
control structure, errors or irregularities may
occur and not be detected. Also, projection of
any evaluation of the structure to future periods
is subject to the risk that it may become
inadequate because of changes in conditions or
that the effectiveness of the design and operation
may deteriorate.
Our consideration of the internal control
structure would not necessarily disclose all
matters in the internal control structure that
might be material weaknesses under standards
established by the American Institute of Certified
Public Accountants. A material weakness is a
condition in which the design or operation of the
specific internal control structure elements does
not reduce to a relatively low level the risk that
errors or irregularities in amounts that would be
material in relation to the financial statements
being audited may occur and not be detected within
a timely period by employees in the normal course
of performing their assigned functions. However,
we noted no matters involving the internal control
structure, including procedures for safeguarding
securities, that we consider to be material
weaknesses as defined above as of October 31,
1997.
This report is intended solely for the information
and use of management and the Securities and
Exchange Commission.
DELOITTE & TOUCHE LLP
Boston, Massachusetts
December 12, 1997
