2000 California Hydrologic Data Report
b Change in contents, in acre-feet.
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 mi".
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 pool and 1,955.0 ft, normal gross pool. Dead storage,
233,920 acre-ft. Total capacity at normal gross pool, 961,300 acre-ft, elevation 1,955.0 ft. Water
is released to New Colgate Powerplant (station 11413510) 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 (stations 11408870 and 11409350). Records, including extremes, represent total contents
at 2400 hours. See schematic diagram of North 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, 972,224 acre-ft, June 27, 1995, elevation, 1,957.27
ft; minimum since reservoir first filled, 178,230 acre-ft, Dec. 29, 1980, elevation, 1,700.00 ft.
EXTREMES FOR CURRENT YEAR - Maximum contents, 936,929 acre-ft, June 11, elevation, 1,949.87 ft; minimum,
496,667 acre-ft, Jan. 10, elevation, 1,836.61 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 1999 TO SEPTEMBER 2000
DAILY OBSERVATION AT 2400 HOURS
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 611738 564027 540277 508346 604302 783909 786380 845444 934670 900373 829979 745616
2 610524 562060 540013 507043 603806 784327 786464 846763 935422 899504 826294 745089
3 609562 560773 539352 505617 604833 782821 787764 849186 935704 896394 822534 744522
4 607853 560266 538561 503845 606076 780817 790622 852496 934717 893339 818440 743835
5 606040 559218 537637 502802 610132 782445 794413 855860 933824 890744 818010 741006
6 604125 557667 536814 501602 614671 783951 796779 858832 933307 888290 817022 738346
7 602071 556481 535861 500531 615281 784830 798598 862033 933730 886657 813332 735814
8 600128 557057 534875 499304 616463 785793 802415 868012 935187 886430 809355 733526
9 598965 556800 533858 498016 618475 787722 805689 873839 934435 886475 806114 733887
10 597767 555916 532743 496667 621429 788436 807734 880232 936222 884255 803477 734288
11 595411 555109 531467 499210 625621 789108 809184 884345 936929 881226 801014 732365
12 593657 554403 530290 500909 630014 789612 809996 886248 936599 878383 800039 730644
13 591871 553564 529507 501413 647106 790454 815304 887019 934341 874872 798980 728887
14 589914 551519 528529 501098 685390 792601 820292 888789 931852 871909 796018 726613
15 587822 550382 527552 502170 704442 792643 823613 890607 929696 871639 793317 723749
16 586708 549713 526413 506599 716895 792938 826251 892063 926935 871012 790201 724067
17 584797 549680 525471 509332 724942 792769 830240 893931 927496 868281 786925 724465
18 582578 548478 524660 517522 729885 792263 834503 894979 927589 865510 783407 722320
19 580537 547511 523460 526088 732805 792179 837514 896486 925440 863191 781359 719941
20 579190 547644 522554 536518 736135 792221 839611 898542 923527 860253 778899 717527
21 577845 548012 521389 542825 738548 791589 839918 901106 921105 856746 775154 715040
22 576223 547811 520228 547545 742945 790412 839962 902574 919477 856391 771918 713188
23 574509 547278 519196 552256 747683 789360 841977 906066 916551 855461 768567 713503
24 572794 545946 518005 567258 748982 788352 841101 911368 916274 852187 765225 713897
25 570979 544119 516847 582681 748292 787470 839568 915856 916088 848525 761646 712951
26 569304 542428 515434 590997 751016 786715 838169 921105 912893 845664 761154 711574
27 568689 541104 514665 596782 768732 786254 839480 925907 909475 842766 760456 710199
28 569338 540046 513577 601187 776900 785710 841670 929368 906802 839568 756728 708590
29 568587 539583 512361 604338 781986 786254 842810 932791 904273 837732 753787 705967
30 567564 540244 511754 603806 --- 786087 843819 933119 900694 837382 750568 702880
31 566066 --- 510033 604763 --- 786129 --- 933495 --- 833632 748130 ---
MAX 611738 564027 540277 604763 781986 792938 843819 933495 936929 900373 829979 745616
MIN 566066 539583 510033 496667 603806 780817 786380 845444 900694 833632 748130 702880
a 1857.85 1850.15 1840.84 1868.99 1914.95 1915.94 1929.39 1949.14 1942.07 1927.06 1906.73 1895.36
b -47459 -25822 -30211 +94730 +177223 +4143 +57690 +89676 -32801 -67062 -85502 -45250
CAL YR 1999 b -124392
WTR YR 2000 b +89355
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