Water-Data Report 2013 11022100 San Vicente Reservoir near Lakeside, CA River Basin

LOCATION.--Lat 32°54′48″, long 116°55′38″ referenced to North American Datum of 1927, in SE ¼ NE ¼ sec.36, T.14 S., R.1 W., San Diego County, CA, Hydrologic Unit 18070304, on right side of the old boat ramp, directly left of intake channel, west of and 3.6 mi north of Lakeside. DRAINAGE AREA.--74.2 mi².

SURFACE-WATER RECORDS PERIOD OF RECORD.--October 1946 to September 1961 (published with San Vicente Creek at San Vicente Dam, at Foster, station 11022000), October 1972 to September 1998, April 2004 to current year. Month-end contents only October 1972 to September 1987. REVISED RECORDS.--WSP 1928: Drainage area. GAGE.--Water-stage recorder. Elevation of gage is NGVD of 1929, from topographic map. Prior to October 1987, nonrecording gage at same site. REMARKS.--Records poor. Reservoir is formed by concrete-gravity dam, constructed 1941-43 by city of San Diego, and raised 2009-13; storage began during construction period. Capacity of reservoir, before dam was raised, at spillway level, 90,230 acre-ft, elevation, 650 ft. Dead storage below lowest outlet before dam was raised, 350 acre-ft, elevation, 493.0 ft. Current capacity of reservoir and dead storage are unknown. Reservoir storage includes supplemental water from the , Santa Ysabel Creek, and basins. No diversion upstream from reservoir. Water is released as required for municipal use. Contents prior to October 2005 based on capacity table in use at that time. See schematic diagram of the San Diego River Basin available from the California Water Science Center. EXTREMES FOR PERIOD OF RECORD.--Maximum contents observed, 94,200 acre-ft, spilling, Feb. 21, 1980, elevation, 653.54 ft; minimum observed, 12,390 acre-ft, Nov. 1, 1947, elevation, 549.22 ft. EXTREMES FOR CURRENT YEAR.--Maximum contents observed, 45,420 acre-ft, Sept. 30, elevation, 603.24 ft; minimum observed, 37,590 acre-ft, Aug. 19 and 22, elevation, 593.00 ft.

Capacity table (elevation, in feet, and contents, in acre-feet) (Based on table provided by city of San Diego, dated March 7, 2005) Elevation Contents Elevation Contents Elevation Contents 580 28,650 610 51,000 640 78,780 590 35,480 620 59,650 650 89,310 600 42,940 630 68,910 655 94,790

U.S. Department of the Interior Suggested citation: U.S. Geological Survey, 2014, Water-resources data for the United States, Water U.S. Geological Survey Year 2013: U.S. Geological Survey Water-Data Report WDR-US-2013, site 11022100, accessed at http://wdr.water.usgs.gov/wy2013/pdfs/11022100.2013.pdf Water-Data Report 2013 11022100 San Vicente Reservoir near Lakeside, CA—Continued

RESERVOIR STORAGE, ACRE FEET WATER YEAR OCTOBER 2012 TO SEPTEMBER 2013 DAILY OBSERVATION AT 2400 HOURS [e, estimated] Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

1 37,850 39,070 38,870 38,880 38,890 38,840 38,870 38,580 38,310 e38,000 37,770 37,700 2 37,850 39,070 38,890 38,860 38,900 38,850 38,850 38,580 38,350 e38,000 37,750 37,680 3 37,890 39,040 38,860 38,870 38,900 38,850 38,810 38,630 38,380 e38,000 37,790 37,800 4 37,910 39,020 38,900 38,870 38,890 38,840 38,890 38,530 38,380 37,980 37,730 38,060 5 37,960 39,010 38,870 38,860 38,920 38,820 38,810 38,510 38,370 37,960 37,730 38,290 6 38,070 39,000 38,870 38,880 38,900 38,810 38,810 38,540 e38,290 37,940 37,720 38,540 7 38,080 38,980 38,860 38,870 38,890 38,850 38,790 38,550 38,260 37,960 37,740 38,810 8 38,120 38,980 38,860 38,870 38,920 38,950 38,810 38,540 38,230 37,960 37,710 39,150 9 38,140 38,980 38,880 38,870 38,900 38,960 38,780 38,530 38,220 37,930 37,680 39,470 10 38,230 39,030 38,870 38,880 38,890 38,950 38,780 38,540 38,170 38,040 37,720 39,820 11 38,250 38,960 38,810 38,900 38,880 38,960 38,790 38,530 38,170 37,970 37,680 40,150 12 38,260 38,960 38,790 38,860 38,880 38,970 38,740 38,500 e38,160 37,960 37,670 40,490 13 38,310 38,980 38,890 38,870 38,910 38,950 38,740 38,510 38,190 37,970 37,660 40,790 14 38,370 38,930 38,910 38,950 38,900 38,930 38,740 38,500 e38,150 e37,910 37,640 41,140 15 38,410 38,920 38,900 38,900 38,900 38,950 38,750 38,500 e38,120 e37,890 37,650 41,490 16 38,440 38,920 38,960 38,890 38,890 38,950 38,720 38,450 e38,110 e37,870 37,620 41,870 17 38,490 38,920 38,910 38,890 38,860 38,950 38,700 38,450 38,100 37,850 37,620 42,270 18 38,560 38,920 38,940 38,820 38,860 38,950 38,700 38,470 38,090 37,830 37,620 42,670 19 38,660 38,930 38,920 38,840 38,880 38,990 38,680 38,440 38,120 37,860 37,610 42,920 20 38,610 38,920 38,900 38,840 38,900 38,950 38,670 38,420 38,140 37,820 37,620 43,170 21 38,670 38,920 38,900 38,830 38,930 39,020 38,670 38,420 38,070 37,830 37,620 43,440 22 38,740 38,900 38,900 38,840 38,920 38,960 38,690 38,390 38,070 37,820 37,640 43,820 23 38,790 38,900 38,920 38,810 38,880 38,920 38,670 38,390 38,030 37,830 37,680 44,040 24 38,840 38,860 38,900 38,810 38,890 38,920 38,700 38,400 38,140 37,840 37,670 44,320 25 39,000 38,910 38,910 38,900 38,880 38,910 38,670 38,390 e38,040 37,800 37,740 44,440 26 38,960 38,880 38,930 38,900 38,900 38,920 38,710 38,350 38,010 37,800 37,750 44,600 27 38,930 38,920 38,900 38,910 38,840 38,920 38,570 38,350 38,030 37,770 37,770 44,840 28 39,040 38,850 38,910 38,900 38,840 38,920 38,610 38,350 e38,060 37,780 37,720 44,990 29 39,090 38,850 38,910 38,900 --- 38,920 38,580 38,350 38,010 37,770 37,710 45,110 30 39,050 38,870 38,900 38,920 --- 38,870 38,680 38,330 38,010 37,780 37,700 45,380 31 39,050 --- 38,950 38,900 --- 38,870 --- 38,340 --- 37,770 37,750 --- Max 39,090 39,070 38,960 38,950 38,930 39,020 38,890 38,630 38,380 38,040 37,790 45,380 Min 37,850 38,850 38,790 38,810 38,840 38,810 38,570 38,330 38,010 37,770 37,610 37,680 Elevation, in feet, at end of month 595.00 594.75 594.86 594.80 594.71 594.76 594.50 594.04 593.59 593.25 593.23 603.19 Change in contents, in acre-feet 1,280 -180 80 -50 -60 30 -190 -340 -330 -240 -20 7,630

Water Year 2013 Max 45,420 Min 37,160

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46,000

45,000

44,000

,

43,000

42,000

41,000

OBSERVATION AT 2400 HOURS 40,000 RESERVOIR STORAGE, ACRE RESERVOIR STORAGE, FEET

39,000

38,000

37,000 O N D J F M A M J J A S 2012 2013

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