Water-Data Report NV-2005 10292500 BRIDGEPORT NEAR BRIDGEPORT, CA BASIN, BASIN

LOCATION.--Lat 38°19′30″, long 119°12′40″ referenced to North American Datum of 1927, in SE ¼ NE ¼ sec.34, T.6 N., R.25 E., Mono County, Hydrologic Unit 16050301, in Toiyabe National Forest, at Bridgeport Dam on East Walker River, and 4.5 mi north of Bridgeport. DRAINAGE AREA.--358 mi². WATER-STAGE RECORDS REVISED RECORDS.--WSP 1180: 1949. WSP 1927: Drainage area. PERIOD OF RECORD.--Mar 1926 to current year. Month end contents only for some periods, published in WSP 1314. GAGE.--Water-stage recorder. Datum of gage is 6,466.44 ft above National Geodetic Vertical Datum of 1929 (project datum). REMARKS.--Reservoir is formed by earthfill, rock-faced dam. Storage began Dec 8, 1923. Dam completed in Nov 1924. Capacity, 42,460 acre-ft between elevations 6,415 ft, approximate elevation of bottom of reservoir, and 6,461 ft. Crest of spillway is at elevation 6,460.75 ft; however, there are four siphons that become operative prior to reaching this spillway. Elevation of sill of outlet gate, 6,412 ft. No dead storage. Figures given herein represent total contents. Water is used for by Walker River Irrigation District. EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 44,880 acre-ft, Jun 16, 1974, elevation 6,460.78 ft; no usable contents at times in water years 1929, 1930, 1960, 1977, 1988, and 1989. EXTREMES FOR CURRENT YEAR.--Maximum contents, 42,980 acre-ft, Jul 4, 18, gage height, 60.17 ft; minimum contents, 2,130 acre-ft, Oct 17, gage height, 33.19 ft.

U.S. Department of the Interior U.S. Geological Survey Water-Data Report NV-2005 10292500 BRIDGEPORT RESERVOIR NEAR BRIDGEPORT, CA—Continued

RESERVOIR STORAGE, ACRE FEET WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005 DAILY OBSERVATION AT 2400 HOURS Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

1 2,270 3,130 7,240 10,190 13,640 17,640 26,600 27,040 40,290 42,640 40,090 27,690 2 2,240 3,230 7,330 10,260 13,700 17,800 26,980 27,140 40,310 42,730 39,540 27,200 3 2,230 3,350 7,410 10,290 13,790 17,970 27,340 27,230 40,270 42,880 39,010 26,770 4 2,220 3,500 7,480 10,420 13,910 18,140 27,480 27,480 40,280 42,880 38,460 26,290 5 2,230 3,640 7,570 10,520 13,980 18,280 27,570 27,530 40,470 42,790 37,840 25,830 6 2,230 3,790 7,660 10,590 14,110 18,450 27,900 28,100 40,230 42,790 37,290 25,360 7 2,230 3,930 7,800 10,740 14,230 18,630 28,360 28,310 40,140 42,820 36,870 24,880 8 2,230 4,220 7,930 10,770 14,360 18,780 28,470 28,580 39,570 42,820 36,550 24,390 9 2,210 4,480 8,100 10,850 14,480 18,980 28,380 29,160 38,960 42,850 36,180 23,890 10 2,200 4,640 8,280 10,920 14,610 19,200 28,220 29,550 39,510 42,760 35,830 23,450 11 2,200 4,830 8,440 11,010 14,740 19,440 28,190 29,740 40,010 42,730 35,440 23,000 12 2,190 5,020 8,570 11,070 14,880 19,770 28,310 29,960 41,090 42,760 35,090 22,560 13 2,190 5,190 8,700 11,160 14,980 20,050 28,030 30,030 41,990 42,730 34,720 22,090 14 2,180 5,320 8,810 11,260 15,110 20,340 27,850 30,100 41,230 42,670 34,380 21,580 15 2,170 5,450 8,910 11,370 15,310 20,620 27,620 30,240 41,640 42,580 34,080 21,090 16 2,170 5,590 8,980 11,470 15,500 20,890 27,530 31,060 41,910 42,550 33,810 20,890 17 2,200 5,710 9,050 11,600 15,660 21,130 27,640 31,850 41,820 42,370 33,530 20,620 18 2,210 5,840 9,130 11,740 15,820 21,420 27,690 32,640 41,410 42,340 33,170 20,340 19 2,280 5,940 9,230 11,890 15,990 21,780 27,850 33,090 40,940 42,280 32,790 20,070 20 2,430 6,050 9,310 12,030 16,140 22,230 27,780 33,600 40,880 42,310 32,430 19,810 21 2,430 6,140 9,390 12,170 16,330 22,500 27,710 33,930 41,030 42,400 32,050 19,590 22 2,410 6,230 9,450 12,290 16,490 23,100 27,690 33,970 41,290 42,550 31,650 19,410 23 2,390 6,350 9,470 12,430 16,660 23,520 27,600 34,060 41,610 42,580 31,280 19,150 24 2,380 6,470 9,540 12,570 16,840 23,850 27,460 34,850 41,850 42,490 30,940 18,960 25 2,360 6,600 9,630 12,710 17,000 24,140 27,340 35,860 42,200 42,340 30,580 18,820 26 2,390 6,720 9,690 12,890 17,160 24,390 27,200 37,090 42,580 42,110 30,200 18,690 27 2,440 6,890 9,780 13,080 17,350 24,810 27,110 38,380 42,670 41,730 29,830 18,610 28 2,520 7,010 9,870 13,200 17,520 25,280 27,090 39,210 42,670 41,470 29,430 18,500 29 2,650 7,100 9,970 13,310 --- 25,650 27,000 39,600 42,580 41,290 29,000 18,370 30 2,830 7,140 10,050 13,420 --- 25,980 26,980 39,740 42,580 41,000 28,610 18,250 31 2,980 --- 10,160 13,530 --- 26,270 --- 39,830 --- 40,590 28,150 --- Max 2,980 7,140 10,160 13,530 17,520 26,270 28,470 39,830 42,670 42,880 40,090 27,690 Min 2,170 3,130 7,240 10,190 13,640 17,640 26,600 27,040 38,960 40,590 28,150 18,250 Elevation, in feet above NGVD 1929, at end of month. 6,435.11 6,441.02 6,443.96 6,446.66 6,449.27 6,453.73 6,454.05 6,459.10 6,460.04 6,459.36 6,454.56 6,449.69 Change in contents, in acre-feet. +710 +4,160 +3,020 +3,370 +3,990 +8,750 +710 +12,850 +2,750 -1,990 -12,440 -9,900

Change in contents, Calendar Year 2004 Water Year 2005 in acre-feet. Max 24,770 42,880 -2,040 Min 2,170 2,170 +15,980

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