11269500 LAKE MCCLURE AT EXCHEQUER, CA

LOCATION.-Lat 37°35'02", long 120°16'09", in NW 1/4 SE 1/4 sec.13, T.4 S., R.15 E., Mariposa County, Hydrologic Unit 18040008, on left 
  end of New Exchequer Dam on Merced River, 0.9 mi east of Exchequer, and 5.5 mi northeast of Merced Falls. 
DRAINAGE AREA.-1,037 mi2. 
PERIOD OF RECORD.-April 1926 to September 1930 (daily gage heights; also summary of yearly contents in WSP 881), October 1930 to current 
  year. 
REVISED RECORDS.-WSP 881: 1926-32 (yearly summaries only). WSP 1345: 1951(M). WSP 1930: Drainage area. 
GAGE.-Water-stage recorder. Datum of gage is sea level (levels by Merced Irrigation District). Prior to Oct. 1, 1964, indicator in powerplant at 
  same datum. Oct. 1, 1964, to July 31, 1966, nonrecording gage at center of upstream face of dam at same datum. 
REMARKS.-Reservoir is formed by a rockfill dam with a reinforced concrete face completed in March 1967. Dam is downstream from and 
  connected to the original concrete arch and gravity-type dam which was completed in April 1926. Usable capacity, 1,024,000 acre-ft between 
  elevations 440.0 ft, invert entrance to outlet tunnel, and 867.0 ft, top of spillway gates. Dead storage, 300 acre-ft. Water is released through a 
  series of powerplants down the Merced River to a diversion dam for Merced Irrigation District's main canal. 
COOPERATION.-Records were provided by Pacific Gas and Electric Company 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, 1,026,000 acre-ft, July 14, 15, 1969, elevation, 867.2 ft; practically no storage at 
  times in 1926, 1930-31, 1964-65 when reservoir was drained for inspection or construction. Minimum since construction of New Exchequer 
  Dam in 1966 and since lake first filled, 66,100 acre-ft, Feb. 28, 1991, elevation, 588.4 ft. 
EXTREMES FOR CURRENT YEAR.-Maximum contents, 1,009,000 acre-ft, Jan. 5, elevation, 864.81 ft; minimum, 626,400 acre-ft, Nov. 14, 
  elevation, 800.02 ft. 
  Capacity table (elevation, in feet, and contents, in acre-feet)
  (Based on table provided by Merced Irrigation District, dated June 1966)
	590	 67,900	640	137,800	720	317,800	840	845,800
	600	79,900	660	173,500	750	415,900	860	975,700
	610	92,800	680	215,200	780	534,500	870	1,046,000
	620	106,700	700	263,000	820	729,600

                   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    700000   631100   670600   794800   927600   670500   653100   722600   870900   873000   785800   698100
  2    697800   630900   671200   908600   919300   663700   653500   724100   873600   867300   783000   695300
  3    696200   630500   671800   991500   910600   657200   653500   725500   875800   865300   779900   693300
  4    694000   630000   672200  1006000   900800   652000   654300   728600   879200   863200   776800   691000
  5    691700   629500   680800  1009000   891300   650000   655200   732900   882000   856500   773700   688300
  6    690400   628900   687300  1006000   881100   647200   656200   737300   883600   859200   770400   686400
  7    688500   628400   689800  1001000   870700   644200   656900   742100   884800   856500   767400   684100
  8    685800   627600   691600  1001000   859800   641800   658200   747500   886500   853900   764200   682000
  9    683000   627300   693900   994400   848800   640400   659000   752400   888200   851000   761100   679200
 10    680500   627500   714000   986600   837800   638800   659800   757500   889300   848700   758200   677500
 
 11    677500   626800   734700   978000   827700   637700   660600   764900   889700   845500   755000   675200
 12    674800   627000   746000   968900   818000   636200   661400   772500   889700   843400   751900   672600
 13    672300   626700   754100   960200   809500   635400   662200   779900   889200   840400   749100   670500
 14    669100   626400   754100   950300   801600   634900   662900   788100   889000   837600   746100   668400
 15    665700   626600   752400   939700   792900   634200   663600   796200   889000   834800   743100   666000
 16    661400   627200   750500   930400   784800   633700   664500   804100   888600   831800   740200   664000
 17    657300   627800   747700   920400   776000   633200   665900   811500   888700   829000   737700   662100
 18    653500   633400   744500   910200   767800   632800   667300   818400   888800   825800   735200   660200
 19    650300   635600   741100   899600   759700   632200   669700   824400   888600   822900   732100   658600
 20    647700   637300   737500   889200   749900   632000   673600   828900   888500   820000   729700   656600
 
 21    645900   639500   740000   884600   741200   632400   678000   833300   888100   816500   726200   654800
 22    643500   653600   755600   880500   732400   632600   684600   837400   887400   813800   723200   652600
 23    642300   660700   759300   883000   723700   633000   689400   841100   886100   811000   720400   650700
 24    640100   664200   756800   910600   714700   635300   693100   843800   884900   808400   717900   649000
 25    638500   665800   752000   909700   705600   636700   696400   845700   883400   805800   715400   647000
 26    636600   667300   747100   920200   695900   640200   701300   847500   881600   803700   712600   645000
 27    634900   668200   746500   943300   686600   643000   707200   849200   879600   800200   710100   643300
 28    633000   669100   743500   949500   677600   645300   714100   852000   877500   797200   707500   641300
 29    632100   669300   739300   947300      ---   647800   717400   856400   875400   794600   704800   639400
 30    631900   670200   753600   941800      ---   650000   720200   861100   873700   792000   702300   637300
 31    631600      ---   764300   935200      ---   651800      ---   866200      ---   788800   699800      ---
 
MAX    700000   670200   764300  1009000   927600   670500   720200   866200   889700   873000   785800   698100
MIN    631600   626400   670600   794800   677600   632000   653100   722600   870900   788800   699800   637300
 a     801.09   808.80   826.20   853.98   810.24   805.16   818.27   843.29   844.48   830.96   814.48   802.24
 b     -70500   +38600   +94100  +170900  -257600   -25800   +68400  +146000    +7500   -84900   -89000   -62500
 
CAL YR 1996 b +132000
WTR YR 1997 b  -64800