USGS
Water Resources Data - California, Water Year 1994
11453900 LAKE BERRYESSA NEAR WINTERS, CA
LOCATION.--Lat 38`30'48", long 122`06'13", in SE 1/4 NW 1/4 sec.29, T.8 N., R.2 W., Napa County, Hydrologic Unit
18020117, near center of Monticello Dam on Putah Creek, 7.4 mi west of Winters.
DRAINAGE AREA.--566 mi2.
PERIOD OF RECORD.--January 1957 to current year.
REVISED RECORDS.--WSP 1735: 1958-60. WSP 1931: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is sea level (levels by U.S. Bureau of Reclamation).
REMARKS.--Reservoir is formed by concrete arch-gravity dam completed November 1956. Usable capacity,
1,592,000 acre-ft between elevations 253.25 ft, invert of outlet valves, and 440 ft crest of glory-hole
spillway. Dead storage, 10,340 acre-ft. Water is released down Putah Creek and is diverted into Putah South
Diversion Canal for irrigation of about 46,000 acres in the lower Sacramento Valley. Total diverted during
current year was 205,858 acre-ft, provided by U.S. Bureau of Reclamation. Releases for irrigation began in
May 1959. Records, including extremes, show total contents at 2400 hours. See schematic diagram of lower
Sacramento River basin.
COOPERATION.--Records provided by U.S. Bureau of Reclamation.
EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 1,733,500 acre-ft, Mar. 2, 1983, elevation, 446.67 ft; minimum
since irrigation pool first filled, 422,130 acre-ft, Dec. 1, l992, elevation, 361.73 ft.
EXTREMES FOR CURRENT YEAR.--Maximum contents, 801,710 acre-ft, Mar. 12, 13, 14, elevation, 392.55 ft; minimum,
568,390 acre-ft, Sept. 29, 30, elevation, 374.83 ft.
Capacity table (elevation, in feet, and contents, in acre-feet)
(Based on survey by U.S. Bureau of Reclamation in 1956)
360 404,550 390 765,730 420 1,236,000
370 511,760 400 911,200 430 1,414,200
380 632,360 410 1,068,100 450 1,799,900
RESERVOIR STORAGE (ACRE-FEET), WATER YEAR OCTOBER 1993 TO SEPTEMBER 1994
DAILY OBSERVATION AT 2400 HOURS
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 764340 750870 745220 759750 764340 799430 794870 766010 736700 689120 641050 599520
2 763500 750460 745220 759750 764340 799720 793880 764890 735190 687800 639390 598040
3 762810 750040 744950 759750 764200 800000 793170 763920 733690 686200 638110 596550
4 761980 749630 744810 759890 764200 800290 792180 762950 731920 685010 636830 595060
5 761280 749080 744670 759890 764340 800430 791190 761970 730550 684210 635560 593840
6 760580 748800 744390 759890 766990 800720 790200 761700 728920 683290 634280 592610
7 759890 748390 744260 759890 775540 801000 789350 761560 727420 681710 632880 591380
8 759200 747980 747700 759750 777360 801140 788640 761280 725780 680270 631480 590040
9 758500 747560 748530 759610 778340 801290 787800 761000 724280 678690 629960 588810
10 757940 748660 749080 759470 779320 801290 786950 760720 722920 676980 628570 587460
11 757530 748250 751830 759340 780160 801570 786100 759890 721440 675400 627050 586240
12 757110 747840 752940 759340 780160 801710 785110 759200 720080 673820 625540 585130
13 756560 747420 754470 759200 780020 801710 784260 758360 718330 672240 623890 584030
14 756420 746870 758500 759200 779880 801710 783420 757390 716430 670670 622250 582930
15 756280 746320 759330 759200 779880 801570 782570 756140 714540 668980 620860 582320
16 756000 746050 759750 759060 781150 801570 781440 755310 712920 667150 619600 581100
17 755720 745770 760170 758920 784830 801570 780590 754330 711290 665460 618220 579890
18 755440 745500 760450 758780 785960 801570 779320 753360 709950 663900 617090 578800
19 755030 745220 760450 758640 789070 801430 778060 752390 708480 662200 615720 577710
20 754610 744950 760450 758500 791760 801290 776660 751560 706870 660640 614210 576620
21 754190 745220 760170 758360 795020 801000 775120 750730 705530 658690 612840 576370
22 754060 744950 760030 758780 795020 800570 773430 749900 704050 657130 611460 575040
23 753920 744530 760030 759470 795440 800570 772590 749080 702710 655460 609960 574070
24 753780 744120 759890 760310 796300 799860 772310 747980 700840 653780 608580 573100
25 753640 743840 759890 762810 796870 799430 771610 746740 699100 652230 607080 572370
26 753220 743710 759890 764200 797720 799150 770630 745220 697490 650680 605720 571520
27 752800 743430 759890 764480 798440 798720 769650 743840 695890 649140 604480 570430
28 752530 743570 759750 764480 799150 798150 768810 742190 694170 647460 603490 569710
29 752110 745220 759750 764480 --- 797440 767970 740810 692440 645780 602870 568390
30 751830 745500 759610 764480 --- 796730 766850 739440 690980 644120 602250 568390
31 751420 --- 759610 764340 --- 795870 --- 738060 --- 642580 601010 ---
MAX 764340 750870 760450 764480 799150 801710 794870 766010 736700 689120 641050 599520
MIN 751420 743430 744260 758360 764200 795870 766850 738060 690980 642580 601010 568390
a 388.97 388.54 389.56 389.90 392.37 392.14 390.08 388.00 384.51 380.80 377.50 374.83
b -13750 -5920 +14110 +4730 +34810 -3280 -29020 -28790 -47080 -48400 -41570 -32620
c 3411 1914 689 1154 1134 3497 4149 6399 8654 8800 8449 5795
CAL YR 1993 b +290950
WTR YR 1994 b -196780
a Elevation, in feet, at end of month.
b Change in contents, in acre-feet.
c Evaporation, in acre-feet, provided by U.S. Bureau of Reclamation; not reviewed by U.S. Geological Survey.
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U.S. Geological
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