11243400  BASS LAKE NEAR BASS LAKE, CA

LOCATION.--Lat 37°17'33", long 119°31'43", in SE 1/4 NE 1/4 sec.26, T.7 S., R.22 E., Madera County, Hydrologic
   Unit 18040006, Sierra National Forest, at outlet tower at dam on North Fork Willow Creek, 2.2 mi southeast of
   town of Bass Lake, and 5 mi north of North Fork.
DRAINAGE AREA.--50.4 mi2.

PERIOD OF RECORD.--January 1911 to September 1982 (monthend contents only), October 1982 to current year.  Bass
   Lake was formerly called Crane Valley Reservoir.
GAGE.--Water-stage recorder.  Datum of gage is sea level (levels by Pacific Gas & Electric Co.).

REMARKS.--Reservoir formed by earthfill and rockfill dam; completed in 1901 and raised in 1910.  Since 1910
   usable contents 45,100 acre-ft between elevations 3,280.22 ft, invert of outlet conduit No. 3, and
   3,376.40 ft, top of spillway gates.  Additional storage of 300 acre-ft not available for release.  Water is
   released through Crane Valley Powerplant below dam for use in three small powerplants before being discharged
   into Kerckhoff Reservoir(station 11246650) at Wishon Powerplant.  Water is diverted from South Fork Willow
   Creek via Browns Creek ditch into Bass Lake near left end of dam.  Madera Irrigation District has water rights
   to divert up to 50 ft3/s from North Fork Willow Creek through Soquel Ditch into Nelder Creek (Fresno River
   basin) from October through July each year.  Records, including extremes, represent total contents at 2400
   hours.  See schematic diagram of lower San Joaquin River basin.
COOPERATION.--Records were provided by Pacific Gas & Electric Co., under general supervision of the
   U.S. Geological Survey, in connection with a Federal Energy Regulatory Commission project.  Contents not
   rounded to U.S. Geological Survey standards.

EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 45,960 acre-ft, June 17, 1923, elevation, 3,376.8 ft; minimum,
   35 acre-ft, Nov. 19, 1953, elevation, 3,270.2 ft.
EXTREMES FOR CURRENT YEAR.--Maximum contents, 44,982 acre-ft, May 17, elevation, 3,376.02 ft; minimum,
   22,034 acre-ft, Nov. 27, elevation, 3,353.04 ft.

                         Capacity table (elevation, in feet, and contents, in acre-feet)
                    (Based on table provided by Pacific Gas & Electric Co., dated March 1937)

        3,280        290           3,310      3,404           3,340     13,227           3,370     38,218
        3,290        890           3,320      5,584           3,350     19,663           3,376.4   45,410
        3,300      1,896           3,330      8,717           3,360     28,121

                    RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
                                        DAILY OBSERVATION AT 2400 HOURS

DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

  1     37488    28893    22075    22879    27907    33805    34237    40496    44151    42570    36264    35039
  2     37215    28614    22099    22938    28121    33805    34558    40790    44198    42387    36264    35018
  3     36944    28344    22108    22997    28288    33805    34818    40943    44198    42205    36264    34997
  4     36674    28056    22124    23064    29051    34217    35007    41226    44222    42004    36275    34976
  5     36404    27786    22149    23115    30341    34402    35154    41390    44234    41784    36286    34965

  6     36134    27508    22165    23173    30938    34237    35323    41586    44234    41597    36286    34955
  7     35866    27232    22181    23224    31346    34124    35493    41773    44222    41379    36307    34923
  8     35599    26959    22198    23257    31640    34031    35684    41938    44198    41183    36318    34923
  9     35334    26671    22214    23316    31797    33990    35877    42104    44151    40965    36329    34923
 10     35070    26383    22239    23358    31895    33959    36005    42285    44079    40736    36340    34902

 11     34755    26095    22445    23409    31993    34021    36124    42479    43984    40518    36340    34881
 12     34485    25818    23459    23451    32053    34237    36264    42707    43960    40333    36188    34871
 13     34217    25525    23901    23484    32092    34176    36340    42913    43949    40115    35898    34860
 14     33918    25330    23926    23535    32112    34083    36437    43099    43937    39918    35599    34839
 15     33622    25215    23748    23570    32152    34021    36545    43475    44008    39690    35313    34839

 16     33336    25056    23535    24080    32191    33980    36998    44880    44127    39472    35196    34829
 17     33061    24744    23299    24493    32241    33970    37324    44982    44258    39254    35186    34829
 18     32780    24467    23064    24726    32221    33990    37967    44558    44390    39079    35175    34818
 19     32490    24183    22821    25013    33703    34011    38196    44306    44498    38905    35154    34818
 20     32211    23875    22561    25162    34474    34021    38360    44234    44462    38698    35134    34808

 21     31924    23586    22313    25338    34755    34021    38501    44222    44270    38512    35134    34797
 22     31640    23299    22206    25480    34495    34042    38610    44175    44091    38305    35144    34797
 23     31366    23005    22280    25614    34298    33990    38741    44210    43913    38109    35135    34787
 24     31064    22703    22329    25792    34176    33970    38883    44198    43735    37935    35123    34776
 25     30782    22395    22371    26149    34083    33959    39046    44187    43546    37738    35123    34756

 26     30533    22132    22420    26293    33980    33908    39232    44198    43404    37564    35102    34755
 27     30245    22034    22462    26581    33918    33877    39472    44198    43251    37270    35091    34755
 28     29987    22050    22503    26842    33846    33990    39722    44198    43110    37042    35081    34745
 29     29702    22058    22578    26950    33826    33939    39951    44175    42936    36826    35070    34745
 30     29427    22067    22686    27069      ---    33918    40245    44163    42775    36599    35070    34734
 31     29164      ---    22787    27591      ---    33887      ---    44139      ---    36361    35060      ---

MAX     37488    28893    23926    27591    34755    34402    40245    44982    44498    42570    36340    35039
MIN     29164    22034    22075    22879    27907    33805    34237    40496    42775    36361    35060    34734
 a    3361.12  3353.08  3353.95  3359.43  3365.88  3365.93  3371.86  3375.31  3374.15  3368.29  3367.07  3366.76
 b      -8574    -7097     +720    +4804    +6235      +61    +6358    +3894    -1364    -6414    -1301     -326

CAL YR 1995  b  -833
WTR YR 1996  b -3004

  a Elevation, in feet, at end of month.
  b Change in contents, in acre-feet.