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, 961,446 acre-ft, June 28, 29, elevation, 1,955.03 ft; minimum, 545,714 acre-ft, Jan. 1, elevation, 1,851.80 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 1997 TO SEPTEMBER 1998
DAILY OBSERVATION AT 2400 HOURS
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 610667 562093 561518 545714 695609 753256 790622 848569 950559 960822 912015 772415
2 609562 562534 560131 546446 700698 751708 791758 858121 952796 959721 907907 766833
3 607283 562975 558780 549780 720654 750812 793359 866448 953606 958572 902987 762222
4 605437 563382 557768 554873 730884 749470 794667 873255 953463 957999 897948 757056
5 604196 563789 556635 556666 737462 748130 795933 878653 953463 956852 893020 751912
6 600376 564366 555848 558847 743430 746345 797287 884255 954130 955514 887654 746345
7 598647 564774 561484 561078 748008 744077 798175 888789 955180 953892 882400 740724
8 597521 565216 564706 561180 749552 741773 798513 894569 955324 953129 878879 736215
9 597204 565658 565624 560638 748008 739112 800251 900877 956469 952224 875907 732605
10 595833 566100 566576 564740 747764 736375 800505 905100 957616 951415 871909 729286
11 595376 566781 566815 577845 750731 733727 801905 907769 959147 950796 867699 725698
12 593868 566474 566270 601398 753664 731404 802033 909567 959721 950559 862746 724147
13 592536 565624 566372 614169 756810 729086 802415 910860 960295 949323 857810 723352
14 590438 563755 567053 617433 761236 728926 801863 911645 960439 947424 852894 722002
15 589286 561755 566508 631433 760702 729565 800759 911922 960008 945242 848745 720337
16 587404 560063 565080 643341 759062 731124 799827 912846 958955 943301 846632 718516
17 585561 558240 563993 667502 758160 733486 799149 913495 958620 941457 842854 718318
18 585387 555983 563620 682553 757710 735492 798513 913818 958859 939333 838082 719026
19 583930 555041 561992 692205 759718 736375 798175 914327 959338 940417 833415 714803
20 582162 553597 561416 696152 760825 736978 798260 914976 959578 940748 828591 715316
21 580709 553094 560334 697782 762386 738911 799445 915903 959290 940087 823786 715237
22 576881 554033 559083 698054 759964 747602 802118 916088 958620 937729 820249 714961
23 573651 556185 557633 697472 757219 762797 807435 916505 958381 935140 816420 714764
24 570568 555680 556911 696812 756319 787848 813075 916830 958955 931758 811577 714173
25 570090 555277 554941 695493 756442 795849 817580 923154 960200 929321 806583 713345
26 570021 559894 554336 694796 756605 794836 820851 927823 960918 928993 802330 712951
27 568485 562263 551720 693867 756074 792685 824391 930712 961254 926561 797371 712401
28 567496 563891 551687 692630 754766 789024 830327 934999 961446 923994 793022 710985
29 566202 564027 549847 694447 --- 786045 835636 940181 961446 921337 787890 709453
30 564638 563144 548112 695377 --- 786715 841714 945100 961062 918501 783114 708238
31 562737 --- 547311 695261 --- 789234 --- 947186 --- 914929 777981 ---
MAX 610667 566781 567053 698054 762386 795849 841714 947186 961446 960822 912015 772415
MIN 562737 553094 547311 545714 695609 728926 790622 848569 950559 914929 777981 708238
a 1856.87 1856.99 1852.28 1893.40 1908.36 1916.68 1928.91 1952.04 1954.95 1945.16 1913.99 1896.73
b -49894 +407 -15833 +147950 +59505 +34468 +52480 +105472 +13876 -46133 -136948 -69743
CAL YR 1997 b -291514
WTR YR 1998 b +95607
a Elevation, in feet, at the end of month.
b Change in contents, in acre-feet.
USGS Water Resources of California