11429350 LOON LAKE NEAR MEEKS BAY, CA

LOCATION.--Lat 38°58'59", long 120°19'22", in SE 1/4 SW 1/4 sec.8, T.13 N., R.15 E., El Dorado County, Hydrologic Unit 18020128, Eldorado 
  National Forest, in powerplant intake structure, 1.6 mi southwest of right bank end of Loon Lake Dam on Gerle Creek, and 10 mi southwest 
  of Meeks Bay. 
DRAINAGE AREA.--7.96 mi2. 
PERIOD OF RECORD.--December 1963 to current year. 
CHEMICAL ANALYSES.--June to September 1996.
REVISED RECORDS.--WDR CA-76-4: Drainage area. 
GAGE.--Water-stage recorder. Datum of gage is sea level (levels by Sacramento Municipal Utility District). Prior to Sept. 23, 1975, at site 1.6 mi 
  northeast on right bank end of Loon Lake Dam at same datum. 
REMARKS.--Reservoir is formed by an earthfill dam completed Dec. 27, 1963; storage began Dec. 5, 1963. Prior to September 1962, reservoir was 
  formed by granite-block dam built in 1884, capacity, 8,000 acre-ft. Usable capacity, 73,868 acre-ft, between elevations 6,325 ft, invert of 
  fishwater release valve, and 6,410 ft, crest of spillway. Dead storage, 2,300 acre-ft. Lake receives water from Rubicon River via Rubicon-
  Rockbound tunnel to Buck Island Lake and from Buck Island Lake to Loon Lake via Buck-Loon Tunnel (stations 11427940, 11428300). 
  Records, including extremes, represent total contents. See schematic diagram of Middle Fork American and Rubicon River basins. 
COOPERATION.--Records were collected by Sacramento Municipal Utility District, 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, 77,700 acre-ft, June 6, 1969, elevation, 6,411.1 ft; minimum since reservoir first 
  filled, 3,262 acre-ft, Nov. 8, 9, 1988, elevation, 6,328.70 ft. 
EXTREMES FOR CURRENT YEAR.--Maximum contents, 76,056 acre-ft, June 4, elevation, 6,409.92 ft; minimum, 17,067 acre-ft, Mar. 18, 
  elevation, 6,356.74 ft. 
  Capacity table (elevation, in feet, and contents, in acre-feet)
  (Based on table provided by Sacramento Municipal Utility District recomputed October 1991)
	6,330	3,478	6,370	28,323
	6,340	7,116	6,390	50,058
	6,350	12,469	6,412	78,983
	6,360	19,570

                   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     52039    45422    43919    63399    66895    37180    23609    46826    75832    75469    66522    42435
  2     52003    44045    42765    67484    65829    35489    23890    47547    75707    75581    66255    40916
  3     51978    42742    41353    69452    65192    34381    24119    48307    75525    75483    65935    39541
  4     51941    41174    39894    70660    64808    33657    24349    49311    76056    75428    65378    38522
  5     51917    39651    41746    71192    64346    32685    24598    50565    75986    75400    64742    37719

  6     51892    38065    43163    71384    64082    31048    24866    51758    75651    75177    64240    37213
  7     51843    36923    43689    71370    63753    29138    25144    52604    75553    74913    63189    36741
  8     51795    36613    44080    71370    63176    27397    25451    53887    75721    74274    62260    36315
  9     51746    36219    44760    71411    62979    25542    25751    55295    75832    73790    62221    36230
 10     51709    35838    45666    71384    62574    24022    26052    56778    75609    73237    62182    36187

 11     51672    35437    46615    71302    61869    22795    26328    58250    75539    72920    61895    36155
 12     51624    34787    48940    71124    60922    21852    26605    59260    75693    72700    60806    35869
 13     51575    34350    50893    70756    59350    20227    26967    60224    75734    72618    59530    35827
 14     51550    34318    51721    70497    58123    18830    27472    61492    75734    72356    58748    35774
 15     51489    34308    52100    70116    56981    18158    28085    62691    75762    71863    57868    35743

 16     51465    34267    52260    69709    55947    18304    29022    63622    75790    71904    57424    35711
 17     51416    35227    52198    69506    54621    17567    29915    64729    75553    71671    57246    35647
 18     51392    37633    51966    69411    53640    17067    30750    65975    75874    71083    56463    35574
 19     51355    39222    51660    69208    52444    17238    33042    67176    75776    70620    55809    35574
 20     51319    39828    51453    69195    51087    17574    35185    68398    75456    70565    55132    35500

 21     51307    40883    51721    69154    50118    17664    37374    69316    75665    70021    53664    35458
 22     51307    42515    51733    69492    49179    17349    39244    69791    75581    69668    52358    35426
 23     50759    43426    51709    69370    47748    17417    40816    70293    75623    69682    51246    35384
 24     49925    43942    51636    69249    46075    17990    41454    71083    75400    69316    50590    35353
 25     49167    44241    51575    69777    44011    18566    42073    71767    75469    68627    50190    35321

 26     48509    44126    51660    70388    42220    19135    42696    72288    75456    68385    49167    35279
 27     47796    43392    52003    70347    41028    20163    43747    72810    75539    68196    48176    35237
 28     47641    43529    52064    69709    39255    21127    44888    73555    75595    68169    47677    35185
 29     47641    43609    52530    68978      ---    21827    45340    73859    75609    67927    46544    35143
 30     47665    43678    54334    68533      ---    22538    46110    74635    75734    67793    45445    35111
 31     46897      ---    57614    67901      ---    23149      ---    75386      ---    66855    44057      ---

MAX     52039    45422    57614    71411    66895    37180    46110    75386    76056    75581    66522    42435
MIN     46897    34267    39894    63399    39255    17067    23609    46826    75400    66855    44057    35111
 a    6387.35  6384.58  6396.10  6403.97  6380.64  6364.31  6386.68  6409.44  6409.69  6403.19  6384.91  6376.78
 b      -5167    -3219   +13936   +10287   -28646   -16106   +22961   +29276     +348    -8879   -22798    -8946

CAL YR 1996   MAX 77092  MIN 34267  b +15980
WTR YR 1997   MAX 76056  MIN 17067  b -16953