USGS
Water Resources Data - California, Water Year 1994
11413515 NEW BULLARDS BAR RESERVOIR NEAR NORTH SAN JUAN, CA
LOCATION.--Lat 39`23'34", long 121`08'25", in SE 1/4 NW 1/4 sec.25, T.18 N., R.7 E., Yuba County, Hydrologic Unit
18020125, Plumas National Forest, in center of dam on North Yuba River, 2.2 mi upstream from Middle Yuba
River, and 2.4 mi northwest of North San Juan.
DRAINAGE AREA.--489 mi2.
PERIOD OF RECORD.--January 1969 to current year.
GAGE.--Water-stage recorder. Datum of gage is sea level (levels by Yuba County Water Agency).
REMARKS.--Reservoir is formed by concrete-arch dam with a concrete-sidehill spillway. Spill controlled by three
30-ft by 53-ft radial gates. Storage began in January 1969. Usable capacity, 727,380 acre-ft between
elevations 1,732.0 ft, minimum power poo1, and l,955.0 ft, normal gross pool. Dead storage, 233,920 acre-ft.
Total capacity at normal gross pool, 961,300 acre-ft, e1evation, 1,955.0 ft. Water is released to Colgate
Powerplant through a tunnel at the dam. Water is diverted into the reservoir from Middle Yuba River via
Lohman Ridge Tunnel to Oregon Creek then via Camptonville Tunnel. Records, including extremes, represent
total contents at 2400 hours. See schematic diagram of Yuba River basin.
COOPERATION.--Records provided by Yuba County Water Agency, under general supervision of the U.S. Geological
Survey, in connection with a Federal Energy Regulatory Commission project. Contents not rounded to U.S.
Geological Survey standards.
EXTREMES FOR PERIOD OF RECORD.--Maximum contents, 966,103 acre-ft, June 12, 1982, elevation, 1,956.00 ft; minimum
since reservoir first filled, 178,230 acre-ft, Dec. 29, 1980, elevation, 1,700.00 ft.
EXTREMES FOR CURRENT YEAR.--Maximum contents, 703,738 acre-ft, Oct. 1, elevation, 1,895.58 ft; minimum,
506,599 acre-ft, Sept. 30 elevation, 1,839.76 ft.
Capacity table (elevation, in feet, and contents, in acre-feet)
(Based on survey by Yuba County Water Agency in 1969)
1,600 64,900 1,750 270,110
1,630 90,570 1,800 389,977
1,660 122,993 1,850 539,748
1,690 162,983 1,900 721,130
1,720 211,768 1,960 985,471
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 703738 656692 590823 552893 517168 549012 605507 646922 669125 630996 584936 530258
2 703387 654940 588520 551988 516269 551552 606033 648031 668823 628632 583063 529572
3 701906 652185 586812 549847 516462 553396 607141 648586 667841 626419 580571 528268
4 700542 649402 585179 548411 515884 556151 608351 649327 667238 624608 578190 527031
5 698519 647624 583791 547545 515018 560334 609704 650032 666107 621609 576223 525925
6 696812 645665 581436 546779 514665 565284 611059 651999 665090 618979 574543 523687
7 695106 643231 578949 544285 516783 568655 611630 653971 664111 618727 572588 523460
8 693519 640691 582093 542361 518681 571526 613382 655685 663247 616571 571527 523687
9 691780 638085 585665 540574 519615 574028 615029 657813 661821 615567 569202 522716
10 689235 635814 586152 538495 521066 576123 616786 659534 660808 614348 567122 521972
11 687041 633841 586430 536781 522748 579121 617361 661107 660095 613238 565420 521357
12 685159 631431 587230 534809 523234 582162 617901 663397 658822 611738 563484 520486
13 682400 628959 585978 533070 523687 583617 619951 664525 657252 610382 561281 519260
14 679952 625657 586257 531794 523331 585595 620924 665090 656095 609312 559759 518649
15 680334 622945 586152 529833 522618 588101 622692 666408 654977 608208 557566 517201
16 679839 621248 585839 528203 523137 590613 624499 666823 653561 606466 555646 517297
17 678885 619447 585144 526087 524563 592501 626455 668106 651851 605260 553966 516816
18 677588 616894 584936 524530 527064 593973 628487 668559 650737 603770 552457 516333
19 676331 613883 584832 522037 529181 595306 630850 668408 649587 603204 550783 515595
20 674392 611273 582370 520969 531597 596501 632928 669125 648031 601754 548745 514121
21 673064 609384 579570 519969 533956 597380 634863 669617 646774 599705 546779 513385
22 671774 606822 578189 518423 535894 598506 636253 669541 645518 598119 544949 513033
23 670222 604549 575677 519454 537704 599669 637389 669428 644669 597310 543057 512553
24 668785 601753 572623 520098 537967 599705 638232 669428 643120 596360 540906 512298
25 667389 599987 569987 520712 538660 600517 639479 669995 641574 594499 539781 512074
26 665994 597204 568280 520680 540244 600940 641427 670146 640471 593552 538264 510829
27 664149 594288 566406 520680 543223 601188 642420 670412 639038 592361 536781 509014
28 663178 592186 563552 520034 546479 601470 643526 670563 637645 590613 535499 507806
29 660545 591452 560912 520034 --- 602283 645075 670563 635850 589181 534251 507329
30 660058 592116 557802 519582 --- 603203 645924 670412 634461 587962 532514 506599
31 658673 --- 555310 518681 --- 604443 --- 669844 --- 587056 531499 ---
MAX 703738 656692 590823 552893 546479 604443 645924 670563 669125 630996 584936 530258
MIN 658673 591452 555310 518423 514665 549012 605507 646922 634461 587056 531499 506599
a 1883.79 1865.40 1854.67 1843.54 1852.03 1868.90 1880.36 1886.76 1877.24 1863.95 1847.49 1839.76
b -46590 -66557 -36806 -36629 +27798 +57964 +41481 +23920 -35383 -47405 -55557 -24900
CAL YR 1993 b +39234
WTR YR 1994 b -198664
a Elevation, in feet, at end of month.
b Change in contents, in acre-feet.
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U.S. Geological
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