11371700  WHISKEYTOWN LAKE NEAR IGO, CA

LOCATION.--Lat 40°37'03", long 122°31'31", unsurveyed, Shasta County, Hydrologic Unit 18010112, Whiskeytown-
   Shasta-Trinity National Recreation Area, at outlet works to Spring Creek Powerplant on Clear Creek, 1.8 mi
   downstream from Whiskey Creek, and 7.8 mi northeast of Igo.
DRAINAGE AREA.--200 mi2.
PERIOD OF RECORD.--May 1963 to current year.  Prior to October 1964 published as Whiskeytown Reservoir near Igo.
GAGE.--Water-stage recorder.  Datum of gage is sea level (levels by U.S. Bureau of Reclamation).  Contents based
   on capacity table dated April 1962 provided by U.S. Bureau of Reclamation.
REMARKS.--Lake is formed by earth and rockfill dam.  Storage began in May 1963.  Usable capacity, 241,088 acre-ft
   between elevations 972.0 ft, invert of sluice pipe, and 1,210.00 ft, crest of glory hole spillway.  Dead
   storage 8 acre-ft.  Normal operating pool is from elevation 1,197.0 ft, capacity, 201,288 acre-ft, to
   1,210.0 ft, capacity, 241,096 acre-ft.  Transbasin water enters the reservoir through Judge Francis Carr
   Powerplant (station 11525430) and is released through Spring Creek Tunnel to Spring Creek Powerplant (station
   11371600) and Keswick Reservoir.  Figures given represent total contents at 2400 hours.  Lake is used for
   power generation and recreation.  See schematic diagrams of upper Sacramento River and Pit and McCloud River
   basins.
COOPERATION.--Records were provided by U.S. Bureau of Reclamation, not rounded to U.S. Geological Survey
   standards.
EXTREMES (AT 2400) FOR PERIOD OF RECORD.--Maximum contents, 258,600 acre-ft, Mar. 2, 1983, elevation,
   1,215.34 ft; minimum since first filling, 145,562 acre-ft, Dec. 27, 1992, elevation, 1,176.05 ft.
EXTREMES (AT 2400) FOR CURRENT YEAR.--Maximum contents, 240,648 acre-ft, May 17, elevation, 1,209.86 ft; minimum,
   190,692 acre-ft, Mar. 18, elevation, 1,193.30 ft.

                         Capacity table (elevation, in feet, and contents, in acre-feet)
                             (Based on survey by U.S. Bureau of Reclamation in 1962)

                    1,015     714      1,040   3,055      1,080   15,076      1,140    73,960
                    1,020     994      1,050   4,898      1,100   27,542      1,180   155,276
                    1,030   1,797      1,060   7,418      1,120   46,701      1,220   274,389


                    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    238407   219145   207333   204739   194435   222054   210574   238087   238888   237291   237228   237927
  2    237673   218203   206654   204563   191652   223349   211263   237704   239047   237863   236783   237355
  3    236751   217473   206212   204327   192104   221013   212251   237927   239143   238503   236751   237228
  4    238599   216319   205918   205711   193467   219696   213270   238439   238599   239111   236846   237164
  5    239431   215382   205446   205417   196983   218203   214205   238503   238247   239624   236687   237228

  6    238631   214748   204946   205063   198999   215804   215050   238407   237482   239015   236528   237228
  7    238567   213421   205800   204739   201201   212999   215774   238599   237260   238407   236973   237355
  8    238695   211682   205181   206301   203917   210814   216926   238599   236846   237355   237386   237386
  9    238695   210664   204680   206242   208046   208818   217838   238888   237037   236687   237355   237514
 10    238631   209917   204769   205977   209293   206654   218841   238663   237450   236560   237260   237673

 11    238343   208759   207185   204739   209353   205417   219696   238599   238183   236560   237386   237863
 12    237959   207482   210604   203420   209769   204504   220584   238343   238279   237991   238599   237069
 13    238087   206949   208135   203041   210514   203157   222146   238439   238471   238919   238567   238375
 14    238311   206566   205829   202632   210544   201639   223349   238375   238087   239175   238471   238375
 15    239303   208076   206477   202544   209858   198913   224583   238311   237927   239015   238215   238343

 16    239015   207214   204680   203070   209383   195633   226256   238503   238311   237831   237991   238119
 17    238279   206802   204563   202106   212191   191963   226784   240648   238311   237704   237101   238727
 18    237704   205417   204504   201785   213903   190692   226566   237991   238343   237959   236211   237927
 19    236783   205564   204769   200651   216045   191426   227810   237991   238503   237577   237386   237069
 20    234749   205152   204504   199869   219084   191991   228338   238855   238631   237228   237291   237069

 21    232603   204621   205004   199086   219298   193581   229652   239175   238567   237482   237164   237482
 22    230717   205623   206036   197673   221870   196064   230998   239175   238151   237768   237164   238151
 23    228869   205004   205741   197127   223750   198710   232004   239079   237863   238087   237101   238759
 24    228431   204504   205299   196610   223935   201172   232950   238599   237800   238567   237228   239111
 25    228027   205505   205888   195489   223534   203450   235797   238791   238311   237959   237291   237863

 26    226597   205358   206212   195404   222978   203683   236846   238919   237991   237800   237355   238055
 27    223904   204828   206713   197098   220247   204121   237545   238695   238183   237641   237514   238247
 28    221595   206477   206330   198478   216896   205653   238247   238663   238311   237641   237704   238439
 29    220890   205918   206507   199724   219971   206566   238343   238599   237991   237514   238215   238599
 30    220431   205358   205947   199782      ---   207660   238247   238759   237609   237577   238183   238855
 31    219757      ---   204828   197012      ---   209145      ---   238855      ---   237482   238023      ---

MAX    239431   219145   210604   206301   223935   223349   238343   240648   239143   239624   238599   239111
MIN    219757   204504   204504   195404   191652   190692   210574   237704   236846   236560   236211   237069
 a    1203.19  1198.39  1198.21  1195.52  1203.26  1199.67  1209.11  1209.30  1208.91  1208.87  1209.04  1209.30
 b     -18458   -14399     -530    -7816   +22959   -10826   +29102     +608    -1246     -127     +541     +832

CAL YR 1995 b -2150
WTR YR 1996 b  +640

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