11428700 HELL HOLE RESERVOIR NEAR MEEKS BAY, CA

LOCATION.--Lat 39°03'54", long 120°24'50", in SE 1/4 NW 1/4 sec.16, T.14 N., R.14 E., Placer County, Hydrologic Unit 18020128, Eldorado 
  National Forest, on right bank 0.3 mi upstream from Hell Hole Dam on Rubicon River and 15.6 mi west of Meeks Bay. 
DRAINAGE AREA.--114 mi2. 
PERIOD OF RECORD.--December 1965 to current year. 
GAGE.--Water-stage recorder. Datum of gage is sea level (levels by Placer County Water Agency). 
REMARKS.--Reservoir is formed by rockfill dam with earth core. Storage began Dec. 6, 1965. Usable capacity, 207,342 acre-ft between elevations 
  4,287.65 ft, invert of river outlet, and 4,630.0 ft, crest of ogee spillway. Dead storage 248 acre-ft. Reservoir is used to store water for 
  hydroelectric power. Water is diverted into reservoir from French Meadows Reservoir (11427400) on the Middle Fork American River through 
  French Meadows Powerplant (station 11427200). Water is diverted out of reservoir to the Middle Fork American River though Middle Fork 
  Powerplant. See schematic diagram of Middle Fork American and Rubicon River basins. 
COOPERATION.--Records provided by Placer County Water Agency, under general supervision of the U.S. Geological Survey, in connection with 
  a Federal Energy Regulatory Commission project. 
EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 217,400 acre-ft, Jan. 2, 1997, elevation, 4,637.7 ft; minimum since reservoir first 
  filled, 37,499 acre-ft, Mar. 23, 1973, elevation, 4,428.28 ft. 
EXTREMES FOR CURRENT YEAR.--Maximum contents, 217,400 acre-ft, Jan. 2, elevation, 4,637.7 ft; minimum, 100,300 acre-ft, Sept. 20, 
  elevation, 4,522.7 ft. 
  Capacity table (elevation, in feet, and contents, in acre-feet)
  (Based on survey by Placer County Water Agency in 1966)
	4,340	5,220	4,400	24,200	4,550	122,700
	4,360	9,840	4,450	49,600	4,600	171,900
	4,380	16,200	4,500	83,000	4,650	233,400

                   RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997

                                        DAILY OBSERVATION AT 2400 HOURS
DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

  1    113600   107500   114000   199200   207200   190900   180400   197600   200800   197300   164800   121100
  2    113900   106700   113900   213100   206800   190300   180100   198200   200800   196800   163500   119700
  3    114100   106100   113800   210000   206600   189600   179900   198900   201000   196200   162000   118100
  4    114500   105600   113900   209500   206100   188900   179000   199800   203000   195300   160700   116600
  5    114700   105100   119700   209200   205700   188100   178600   200600   203800   194200   159500   115400

  6    115000   104700   120800   209100   205200   187200   177700   201600   203800   193200   158100   114000
  7    115300   104200   120800   209100   204800   186400   177100   202200   203600   192500   156700   112500
  8    115600   103800   121200   209100   204300   185600   176600   203000   203600   191300   155400   111100
  9    115900   103300   121700   209000   203700   184800   176200   204100   203400   190200   154100   109500
 10    116100   103100   124200   209000   203100   184000   175600   205000   203200   189100   152700   108100

 11    116600   102500   128200   209000   202500   183600   175100   205300   203200   187900   151400   106700
 12    117100   102100   135800   208800   201900   183000   175300   206000   203000   186600   150000   105200
 13    117400   101700   139200   208800   201300   182800   174800   206100   202900   185600   148700   103700
 14    117700   101400   140700   208700   200600   181900   174900   206100   203000   184500   147300   103000
 15    118100   101100   141200   208700   200000   181200   175400   206000   203000   183200   146000   102500

 16    118400   100900   141500   208700   199400   180800   175800   206000   202900   182200   144600   102100
 17    117700   102800   141600   208700   199000   180300   176600   205700   202700   181200   143300   101400
 18    117100   109700   141600   208700   198600   179700   177300   205500   202400   180100   141900   101000
 19    116600   110700   141400   208700   197800   179400   180500   205200   201900   179700   140600   100400
 20    116000   111200   141200   208300   197200   179000   182100   205000   201600   179000   139100   100300

 21    115400   111800   141200   208100   196600   178600   184500   204300   201300   177800   137600   100700
 22    114500   113900   141100   207700   195900   178500   186400   203700   200900   176700   136000   101100
 23    113700   114600   140800   206500   195300   178400   189400   203500   200400   175600   134500   101400
 24    113000   114800   140400   206500   194400   178600   190700   203000   200000   174300   133100   101700
 25    112200   114600   139900   208600   193700   178700   191500   202200   199700   173200   131600   102100

 26    111400   114200   140300   208200   193100   179300   193000   201400   199300   171900   130000   102500
 27    110400   114200   141200   208000   192400   179600   194400   201100   198900   170700   128600   102900
 28    109600   114100   141000   208300   191600   179900   195600   201100   198700   169500   127100   103200
 29    109100   114000   143200   208000      ---   180100   196400   200800   198400   168300   125600   103600
 30    108600   113800   148800   207700      ---   180100   197100   200600   197800   167200   124000   103900
 31    108200      ---   158300   207300      ---   180800      ---   200600      ---   166100   122500      ---

MAX    118400   114800   158300   213100   207200   190900   197100   206100   203800   197300   164800   121100
MIN    108200   100900   113800   199200   191600   178400   174800   197600   197800   166100   122500   100300
 a     4532.5   4539.4   4587.6   4629.8   4617.0   4607.8   4621.5   4624.4   4622.1   4594.8   4549.8   4527.2
 b      -5100    +5600   +44500   +49000   -15700   -10800   +16300    +3500    -2800   -31700   -43600   -18600

CAL YR 1996 b  +35300
WTR YR 1997 b   -9400