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 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 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, 926,561 acre-ft, June 20, elevation, 1,947.66 ft; minimum, 580,709
acre-ft, Jan. 16, elevation, 1,862.12 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 1998 TO SEPTEMBER 1999
DAILY OBSERVATION AT 2400 HOURS
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 706827 658710 656505 629905 693480 798598 761441 783365 900648 913680 807520 670071
2 705106 656431 660546 626237 693171 794667 760005 785207 904778 911506 803179 666145
3 703700 654194 677017 622800 690699 794287 758365 787219 906802 909337 798683 664187
4 702490 652297 684507 618619 688734 790664 757628 788268 908000 907539 794245 661107
5 701204 651033 688503 613811 687156 786087 756442 789822 908092 905192 790075 659683
6 700192 649995 692205 611987 685658 781610 754685 790874 908829 902574 785333 657103
7 699142 650625 693906 609562 696191 777940 752849 792980 909475 899504 780900 654418
8 697200 650440 694564 606395 706358 777108 752360 794794 909705 896623 776193 652743
9 695261 648809 693249 602601 735854 777732 750812 798980 909844 893475 771380 651033
10 693171 646959 691162 598225 747115 777316 749755 800463 910582 890107 766709 649439
11 691626 643120 688849 594323 752604 776733 747602 801608 910629 886974 762140 648587
12 690083 639993 686810 590683 755829 775985 746142 803774 912338 883712 757628 645665
13 688426 637279 686081 586430 757628 774946 745049 806327 914744 880458 753053 643710
14 686503 636436 684584 584034 758365 773992 745292 808971 917155 876762 749267 641868
15 684890 635449 682706 581574 758160 772705 745899 812989 919245 873659 744765 640287
16 682898 632673 681252 580709 759759 771214 746385 816292 920175 870295 740281 638598
17 681520 631142 678465 582370 767370 769600 747805 817408 921524 867967 735613 637388
18 680296 628850 675799 595692 772788 768649 751057 819430 922175 864617 730724 635449
19 678732 626383 672760 608672 776692 767741 756319 821240 924180 860920 725260 633622
20 677093 623631 668748 634461 780065 767163 758775 824736 926561 856170 720892 631470
21 675685 621645 664601 648550 783156 766503 762879 827464 926234 851391 716816 629504
22 673899 621790 660957 655461 784830 765596 765967 832457 926187 846983 712519 627361
23 672115 627725 657178 673140 785668 764442 766874 838082 925487 842810 707728 625440
24 671093 632089 654492 681787 786254 763085 769021 842985 924413 840137 702802 623993
25 670374 632016 652297 687349 789150 762304 771587 848348 923807 837645 697704 623270
26 668748 630923 650032 691008 790285 761605 774739 855904 923947 833502 692785 621970
27 667012 631142 647861 693249 791126 762304 777649 863726 923340 829328 688233 619411
28 664940 631652 645149 693944 794709 762879 779773 872806 921524 825212 683128 617540
29 663097 633147 642604 693751 --- 762551 781610 880549 919710 820938 678999 615352
30 661145 648290 638341 692862 --- 762551 781652 887881 915949 816249 676331 613525
31 659384 --- 634425 693442 --- 762263 --- 894114 --- 811449 673443 ---
MAX 706827 658710 694564 693944 794709 798598 781652 894114 926561 913680 807520 670071
MIN 659384 621645 634425 580709 685658 761605 745049 783365 900648 811449 673443 613525
a 1883.98 1881.00 1877.23 1892.93 1917.98 1910.19 1914.87 1940.63 1945.38 1921.92 1887.71 1871.45
b -48854 -11094 -13865 +59017 +101267 -32446 +19389 +112462 +21835 -104500 -138006 -59918
CAL YR 1998 b +87114
WTR YR 1999 b -94713
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