10290400 LOWER TWIN LAKE NEAR BRIDGEPORT, CA
LOCATION.-Lat 38°10'05", long 119°19'33", in NE 1/4 NE 1/4 sec.33, T.4 N., R.24 E., Mono County,
Hydrologic Unit 16050301, in Toiyabe National Forest, at outlet of lower lake dam on Robinson Creek, and 8 mi
southwest of Bridgeport.
DRAINAGE AREA.-38.9 mi2.
PERIOD OF RECORD.-December 1961 to current year.
GAGE.-Nonrecording gage. Datum of gage is 7,205.45 ft above sea level (project datum of U.S. Indian Irrigation
Service).
REMARKS.-Contents regulated by dam at outlet and by Upper Twin Lake. Figures given herein represent usable
contents. Usable
contents, 4,010 acre-ft between elevations 7,190 ft, natural rim, and 7,200 ft, spillway crest. One transarea
diversion out of Tamarack Creek into Summers Creek. These data are reviewed and provided by the Nevada District
Office, U.S. Geological Survey.
EXTREMES FOR PERIOD OF RECORD.-Maximum contents, 5,560 acre-ft, June 19, 1983, elevation, 7,203.58 ft; no
contents,
Nov. 17, 1966.
EXTREMES FOR CURRENT YEAR-Maximum contents observed, 5,130 acre-ft, June 1, elevation, 7,202.62 ft; minimum
observed,
2,850 acre-ft, Sept. 30, elevation 7,197.12 ft.
MONTHEND ELEVATION AND CONTENTS, IN FEET ABOVE SEA LEVEL, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
Date Elevation
(ft) Contents
(acre-ft) Change in contents
(acre-ft)
September 30............................... 7200.58 4,250 -
October 31............................... 7200.53 4,230 -20
November 30............................... 7199.95 3,990 -240
December 31............................... 7200.38 4,170 +180
CALENDAR YEAR 1998....................... - - -80
January 31............................... 7200.51 4,220 +50
February 28............................... 7200.53 4,230 +10
March 31............................... 7200.52 4,230 0
April 30............................... 7200.86 4,370 +140
May 31............................... 7202.55 5,100 +730
June 30............................... 7202.32 5,000 -100
July 31............................... 7201.17 4,500 -500
August 31............................... 7199.18 3,670 -830
September 30............................... 7197.12 2,850 -820
WATER YEAR 1999.......................... - - -1400
NOTE.-Monthend elevations are interpolated from readings made during the year.
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