California Reservoirs

Water Levels Capacity Storage
September 22 2023


california Reservoir Report

September 22 2023


The history of reservoirs and dams in the USA is closely tied to the country's development and growth. Major river systems like the Colorado, Columbia, and Missouri have been extensively dammed to provide water for irrigation, hydropower, flood control, and recreation. Many of these dams were constructed in the mid-20th century, during a period of rapid infrastructure development, and have since played an essential role in the country's economy and society.

The US has a vast network of dams and reservoirs, with over 90,000 dams across the country, including 2,500 major dams. Many of these dams are located on major river systems, such as the Colorado River, where they have significant hydrological impacts on the river's flow and ecosystem. Dams can also have important climatic impacts, influencing the amount of water available for irrigation, and potentially affecting regional climates. For example, the construction of large reservoirs in arid regions like the Colorado River basin can lead to increased evaporation rates, reducing the amount of water available for other uses. Additionally, climate change may exacerbate existing hydrological and climatic concerns, potentially leading to more frequent and severe droughts and floods in certain regions.

Location Observation 24hr Change (%) Percent Normal (%) Elevation (ft)
Lake Havasu Near Parker Dam
California ID 09427500
48 ft 0.82 100 457.37
Bridgeport Re Nr Bridgeport
California ID 10292500
55 ft -0.13 123 6451.76
Leviathan Mine Pit Flow Nr Markleeville Ca
California ID 10308785
9 ft -0.1 100 7054.97
Leviathan Mine Pond 1 Nr Markleeville Ca
California ID 103087853
4 ft -0.82 98 7054.97
Leviathan Mine Pond 4 Nr Markleeville Ca
California ID 103087887
5 ft 2.33 98 6832.59
Lk Tahoe A Tahoe City Ca
California ID 10337000
7 ft -0.26 149 6220
Donner Lk Nr Truckee Ca
California ID 10338400
5,935 ft 0 100 5946.87
Prosser C Res Nr Truckee Ca
California ID 10340300
5,721 ft -0.01 100 5770
Independence Lk Nr Truckee Ca
California ID 10342900
6,948 ft 0 100 6950
Stampede Res Nr Boca Ca
California ID 10344300
5,945 ft 0 100 5970
Boca Res Nr Truckee Ca
California ID 10344490
5,585 ft 0 100 5620
Lo Otay Lake Nr Chula Vista Ca
California ID 11014550
473 ft 0 100 501.22
El Capitan Res Nr Lakeside Ca
California ID 11020600
693 ft 0 100 723.12
San Vicente Res Nr Lakeside Ca
California ID 11022100
711 ft -0.01 106 603.57
Vail Lk Nr Temecula Ca
California ID 11042510
1,427 ft 0 100 1420.64
Lk Piru Nr Piru Ca
California ID 11109700
1,026 ft -0.04 103 1041.59
Santa Ynez R Ab Gibraltar Dam Nr Santa Barb Ca
California ID 11122000
1,390 ft -0.01 100 1397.28
Alisal Res Nr Solvang Ca
California ID 11128300
598 ft 0 100 596.96
Pilarcitos Lk Nr Hillsborough Ca
California ID 11162618
691 ft 0 100 736.38
Crystal Sprgs Res A Dam Nr San Mateo Ca
California ID 11162750
280 ft 0.04 100 301.73
Hetch Hetchy Res A Hetch Hetchy Ca
California ID 11275500
3,800 ft -0.01 100 3781.69
Cherry Lk Nr Hetch Hetchy Ca
California ID 11277200
4,689 ft 0 100 4690.4
Lk Eleanor Nr Hetch Hetchy Ca
California ID 11277500
4,658 ft -0.01 100 4614.44
Don Pedro Res Nr La Grange Ca
California ID 11287500
806 ft -0.03 105 826.56
Donnell Lk Nr Dardanelle Ca
California ID 11292600
4,890 ft -0.04 100 4905.72
Beardsley Lake Near Strawberry Ca
California ID 11292800
3,352 ft -0.01 100 3406.07
Tulloch Res Nr Knights Ferry Ca
California ID 11299995
507 ft -0.07 100 470.21
Clear Lk A Lakeport Ca
California ID 11450000
2 ft -1.07 140 1323.57
Indian Valley Res A Clearlake Oaks Ca
California ID 11451290
1,441 ft 0 102 1379.08
Lake Almanor
California ID ALM
954,439 acre-ft -0.32 112 4600
Antelope Lake
California ID ANT
19,518 acre-ft -0.26 110 4960
Alpine Lake
California ID APN
7,566 acre-ft None None 654
Lake San Antonio
California ID ATN
220,803 acre-ft -0.04 801 779
Bear
California ID BAR
2 acre-ft 0 107 319
Bucks Lake Storage
California ID BCL
90,127 acre-ft -0.04 115 5168
Bridgeport Reservoir
California ID BDP
30,317 acre-ft -0.32 461 6466
Berryessa
California ID BER
1,251,635 acre-ft -0.04 107 456
Brush Creek (Smud)
California ID BHC
1,301 acre-ft 0.31 108 2923
Buck Island Lake
California ID BIL
853 acre-ft -0.35 126 6400
Briones Dam
California ID BIO
56,840 acre-ft None None 588
Lake Britton
California ID BIT
34,421 acre-ft -0.02 99 2744
Black Butte
California ID BLB
49,769 acre-ft -1.27 132 426
Bon Tempe
California ID BMP
3,496 acre-ft None None 723
Boca Reservoir
California ID BOC
23,694 acre-ft -0.34 134 5521
Beardsley Lake
California ID BRD
68,327 acre-ft -1.13 121 3398
Barrett
California ID BRT
32,189 acre-ft None None 1607
Bear Valley Dam
California ID BRV
None acre-ft None None 6743
Butt Valley
California ID BTV
36,879 acre-ft -0.87 90 4144
Buchanan Dam
California ID BUC
94,444 acre-ft -0.01 235 450
New Bullards Bar
California ID BUL
708,626 acre-ft -0.15 118 1965
Bowman Lake
California ID BWN
53,623 acre-ft -0.1 184 5566
Castaic
California ID CAS
302,593 acre-ft -0.31 130 1535
Cachuma Lake
California ID CCH
181,306 acre-ft None None 781
Crafton Hills Pumping Station
California ID CFH
65 acre-ft -7.14 342 2900
Bear River At Camp Far West Dam
California ID CFW
None acre-ft None None 260
Cogswell Reservoir
California ID CGS
154 acre-ft -16.76 265 2405
Chabot
California ID CHB
8,650 acre-ft None None 250
Cherry Valley Dam
California ID CHV
-171 acre-ft None None 4765
Clear Lk - Cache Creek
California ID CLA
150,180 acre-ft -0.09 179 1336
Clifton Court Forebay
California ID CLC
17,316 acre-ft 6.9 105 3
Trinity Lake
California ID CLE
1,325,973 acre-ft -0.24 97 2370
Camino
California ID CMI
328 acre-ft 1.55 84 3000
Camanche Reservoir
California ID CMN
358,400 acre-ft None None 236
Crane Valley
California ID CNV
41,059 acre-ft 0.43 116 3380
Coyote (Lake Mendocino)
California ID COY
None acre-ft None None 720
Caples Lake (Eid)
California ID CPL
20,703 acre-ft -0.17 132 7800
Calero Reservoir
California ID CRO
4,094 acre-ft 0.74 96 196
Lake Crowley
California ID CRW
171,448 acre-ft None None 6797
Lower Crystal Springs Reservoir
California ID CRY
49,702 acre-ft None None 293
Casitas
California ID CSI
171,811 acre-ft None None 335
Courtright (Pg&E)
California ID CTG
38,926 acre-ft -0.1 65 8192
Cuyamaca Dam
California ID CUY
None acre-ft None None 4641
Calaveras
California ID CVE
90,176 acre-ft -0.11 160 775
Coyote Res-Sta Clara
California ID CYC
None acre-ft None None 755
Lake Davis (Dwr)
California ID DAV
72,461 acre-ft -0.1 139 5768
Del Valle
California ID DLV
37,371 acre-ft -0.22 104 703
Diamond Valley
California ID DMV
663,940 acre-ft 0.11 109 1756
Donner Lake
California ID DNN
None acre-ft None None 5945
Don Pedro Reservoir
California ID DNP
1,743,826 acre-ft -0.13 132 830
Donnells
California ID DON
-147 acre-ft None None 4835
Echo Lake
California ID ECO
2 acre-ft 0 200 7420
Stumpy Meadows Reservoir(Mark Edson Dam)
California ID EDN
19,212 acre-ft None None 4272
Elmer J Chesbro Reservoir
California ID EJC
5,430 acre-ft -0.37 334 394
El Capitan Dam
California ID ELC
45,203 acre-ft -0.08 168 600
Englebright (Usace)
California ID ENG
69,159 acre-ft 0.28 104 551
Lake Eleanor
California ID ENR
25,272 acre-ft -0.96 126 4660
East Park Reservoir
California ID EPK
44,452 acre-ft -0.11 137 1205
New Exchequer-Lk Mcclure
California ID EXC
None acre-ft None None 879
Florence Lake (Sce)
California ID FLR
57,413 acre-ft None None 7325
French Meadows
California ID FMD
102,573 acre-ft -0.69 133 5263
Folsom Lake
California ID FOL
687,190 acre-ft -0.3 148 466
Frenchman Dam
California ID FRD
46,711 acre-ft -0.18 148 5517
French Lake
California ID FRL
9,911 acre-ft -2.54 113 6664
Farmington (Spill Elev 156.5 Ft)
California ID FRM
185 acre-ft 2.78 108 180
Gibraltar Dam
California ID GBL
2,802 acre-ft None None 1399
Guadalupe Reservoir
California ID GDR
1,637 acre-ft -0.24 315 488
Goodwin Dam
California ID GDW
532 acre-ft None None 359
Gem Lake
California ID GLK
None acre-ft None None 9054
Gerle Lake
California ID GLL
705 acre-ft 5.22 102 5860
Grant Lake
California ID GNT
41,481 acre-ft None None 7140
Lake Hodges
California ID HDG
4,269 acre-ft None None 315
Hell Hole (Pcwa)
California ID HHL
101,278 acre-ft -1.15 93 4630
Hidden Dam (Hensley)
California ID HID
27,532 acre-ft -1.15 146 561
Lake Hemet
California ID HMT
None acre-ft None None 4202
Lake Hennessey
California ID HNN
25,071 acre-ft None None 331
Henshaw
California ID HNS
None acre-ft None None 2740
Huntington Lake (Usbr)
California ID HNT
25 acre-ft None None 7000
Hetch Hetchy
California ID HTH
-780 acre-ft None None 3870
Haiwee
California ID HWE
40,726 acre-ft None None 3774
Ice House (Smud)
California ID ICH
32,315 acre-ft -0.23 103 5454
Mccloud - Iron Canyon Diversion Tunnel
California ID ICT
None acre-ft None None 2683
Independence Lake Near Truckee
California ID INP
None acre-ft None None 6921
Indian Valley
California ID INV
149,788 acre-ft -0.06 160 1502
Iron Canyon
California ID IRC
10,907 acre-ft -10.24 61 2675
Isabella Dam
California ID ISB
392,447 acre-ft -0.78 302 2635
Jackson Meadows (Nevada Co Wd)
California ID JCK
47,835 acre-ft -0.41 125 6037
Juncal Dam (Jameson Lake)
California ID JML
4,737 acre-ft None None 610
Junction
California ID JNC
2,102 acre-ft -3.13 92 4468
Jenkinson Lake
California ID JNK
None acre-ft None None 3482
Lake Jennings
California ID JNN
None acre-ft None None 707
Keswick Reservoir
California ID KES
23,085 acre-ft 5.08 106 596
Kerckhoff Reservoir
California ID KKR
2,157 acre-ft -0.23 137 974
Kent
California ID KNT
30,079 acre-ft None None 415
Los Banos Dam
California ID LBS
21,835 acre-ft -0.02 123 350
Lake Alpine Reservoir
California ID LEA
3,354 acre-ft -0.47 131 7302
Lewiston
California ID LEW
13,602 acre-ft 0.6 97 1870
Little Grass Valley
California ID LGV
70,583 acre-ft 0 107 5047
Lake Fordyce Near Cisco
California ID LKF
30,920 acre-ft -0.71 139 6290
Lexington Reservoir
California ID LNG
12,719 acre-ft -0.41 221 659
Loon Lake (Smud)
California ID LON
47,550 acre-ft -0.83 105 6410
Lopez Lake
California ID LOP
47,841 acre-ft None None 759
Lower Otay
California ID LOT
44,198 acre-ft None None 485
Lake Pillsbury Nr Potter Vly 24hr Avg
California ID LPY
None acre-ft None None 1828
Leroy Anderson
California ID LRA
3,134 acre-ft -0.03 93 640
Little Rock Reservoir
California ID LRK
None acre-ft None None 745
San Luis Reservoir (State)
California ID LUS
None acre-ft None None 543
Loveland Reservoir
California ID LVD
None acre-ft None None 1366
Los Vaqueros Reservoir
California ID LVQ
None acre-ft None None 472
Lake Valley Reservoir
California ID LVY
3,725 acre-ft -1.22 67 5855
Lower Bear
California ID LWB
42,506 acre-ft 0.05 190 5824
Lyons Reservoir
California ID LYS
3,966 acre-ft 0.15 166 4134
Mariposa Creek Dam
California ID MAR
54 acre-ft 0 66 459
Matilija Dam
California ID MAT
1,328 acre-ft None None 1138
Iron Canyon Reservoir
California ID MC9
None acre-ft None None 2713
Lake Mccloud
California ID MCO
17,194 acre-ft 0.12 79 2700
Lake Mc Swain
California ID MCS
9,074 acre-ft 7.52 100 425
Modesto Reservoir
California ID MDO
None acre-ft None None 210
Lake Mathews
California ID MHW
161,687 acre-ft 0.27 134 1404
Friant Dam (Millerton)
California ID MIL
None acre-ft None None 581
Miramar
California ID MMR
5,795 acre-ft None None 720
Mountain Meadows
California ID MMW
12,640 acre-ft -2.86 159 5046
Morena Dam
California ID MOR
11,652 acre-ft None None 3053
Mammoth Pool
California ID MPL
87,257 acre-ft None None 3330
Murray Res
California ID MRR
3,534 acre-ft None None 542
Martis Creek Reservoir
California ID MRT
894 acre-ft 0 104 5745
Lake Natoma (Nimbus Dam)
California ID NAT
7,899 acre-ft 0.42 99 132
Nicasio
California ID NCA
18,913 acre-ft None None 180
Nacimiento
California ID NCM
243,927 acre-ft -0.35 417 784
New Hogan Lake
California ID NHG
194,099 acre-ft -0.2 160 554
New Melones Reservoir
California ID NML
1,901,171 acre-ft 0.06 144 1135
Loch Lomond (Newell Creek Dam)
California ID NWL
8,586 acre-ft None None 925
Olivenhain Reservoir
California ID OLH
None acre-ft None None 800
Oneill Forebay
California ID ONF
45,839 acre-ft -0.12 100 225
Oroville Dam
California ID ORO
None acre-ft None None 900
Owens Creek Dam
California ID OWN
4 acre-ft 33.33 333 424
Pardee
California ID PAR
194,088 acre-ft -0.34 105 568
Pine Flat Dam
California ID PNF
712,647 acre-ft -0.82 250 970
Prado Dam
California ID PRA
41,028 acre-ft -11.43 21040 566
Perris
California ID PRR
78,607 acre-ft -0.54 100 1600
Prosser Creek Reservoir
California ID PRS
17,819 acre-ft -1.26 147 5622
Lake Piru
California ID PRU
52,744 acre-ft -0.7 320 213
Pit R Ph #6
California ID PT6
13,522 acre-ft -4.4 98 32
Pit R Ph #7
California ID PT7
33,476 acre-ft 0.19 102 1036
Pyramid
California ID PYM
163,690 acre-ft -0.3 99 2606
Rubicon Lake
California ID RBL
887 acre-ft -0.56 150 6800
Redinger Lake
California ID RDN
23,884 acre-ft None None 1403
Railroad Canyon
California ID RLC
None acre-ft None None 1398
Relief
California ID RLF
8,821 acre-ft -1.79 92 7220
Rollins
California ID RLL
55,977 acre-ft -1.48 101 2176
Ruth Dam
California ID RTD
56,730 acre-ft None None 2675
San Antonio Reservoir
California ID SAT
52,765 acre-ft -0.08 118 468
Success Dam
California ID SCC
55,345 acre-ft -0.42 762 692
Saddlebag Lake Reservoir
California ID SDB
None acre-ft None None 10090
Stevens Creek Reservoir
California ID SEC
2,826 acre-ft -0.32 508 1245
Scotts Flat
California ID SFL
40,833 acre-ft -0.18 127 3085
San Gabriel
California ID SGB
140 acre-ft None None 1481
Santiago Creek Res (Irvine Lake)
California ID SGC
None acre-ft None None 810
Shasta Dam (Usbr)
California ID SHA
3,379,658 acre-ft -0.22 142 1067
Shaver Lake
California ID SHV
115,903 acre-ft None None 5370
Silver Lake Reservoir
California ID SIV
7,059 acre-ft -1.58 138 7134
Skinner
California ID SKN
38,422 acre-ft 0.11 104 1479
South Lake Reservoir
California ID SKR
None acre-ft None None 837
Slab Creek
California ID SLB
None acre-ft None None 1850
Sly Creek
California ID SLC
53,744 acre-ft -0.55 213 3536
San Luis Reservoir (Federal)
California ID SLF
None acre-ft None None 543
Soulajule Dam
California ID SLJ
8,719 acre-ft None None 344
Santa Margarita Lake
California ID SLN
None acre-ft None None 1325
Salt Springs
California ID SLS
50,786 acre-ft -1.95 64 3700
Lake Silverwood
California ID SLW
70,327 acre-ft 0.3 100 3331
San Luis Reservoir
California ID SNL
1,666,194 acre-ft -0.21 209 543
San Andreas
California ID SNN
14,098 acre-ft None None 456
San Pablo
California ID SPB
25,410 acre-ft None None 330
Spring Creek Debris Dam
California ID SPC
1,772 acre-ft 0.17 159 816
Spaulding Lake
California ID SPG
48,058 acre-ft 1.2 174 5013
New Spicer Meadow
California ID SPM
None acre-ft None None 6516
Sutherland Reservoir
California ID STD
14,545 acre-ft None None 2074
Stony Gorge Reservoir
California ID STG
38,364 acre-ft -0.03 238 800
Stampede
California ID STP
216,358 acre-ft -0.17 159 5956
Seven Oaks Dam
California ID SVO
2,185 acre-ft 0.03 101 2610
San Vicente
California ID SVT
166,106 acre-ft -0.02 115 560
Sweetwater Reservoir
California ID SW3
None acre-ft None None 252
Strawberry
California ID SWB
16,423 acre-ft -0.73 116 5620
Thermalito Afterbay
California ID TAB
None acre-ft None None 140
Thomas A Edison
California ID TAE
96,487 acre-ft None None 7642
Lake Tahoe At Tahoe City
California ID THC
None acre-ft None None 6230
Thermalito Diversion Pool
California ID THD
115 acre-ft 53.33 377 230
Turlock Lake
California ID TLC
19,943 acre-ft None None 244
Thermalito Total
California ID TMT
None acre-ft None None 140
Tinemaha Reservoir
California ID TNM
1,773 acre-ft None None 3882
Terminus Dam
California ID TRM
45,647 acre-ft -4.73 337 752
Tulloch
California ID TUL
64,295 acre-ft -2.65 101 515
Twitchell Reservoir
California ID TWT
108,522 acre-ft None None 692
Union Valley
California ID UNV
184,569 acre-ft -0.57 103 4870
U San Leandro
California ID USL
36,100 acre-ft None None 477
Utica Reservoir
California ID UTI
1,937 acre-ft -1.17 120 6819
Uvas Reservoir
California ID UVA
6,746 acre-ft -0.41 301 1357
Van Arsdale Reservoir 24hr Avg
California ID VAR
195 acre-ft -1.52 100 1494
Vail Lake
California ID VIL
15,201 acre-ft -0.07 167 1470
Whiskeytown Dam (Usbr)
California ID WHI
237,101 acre-ft -0.04 100 1210
Whale Rock
California ID WHR
None acre-ft None None 233
Warm Springs (Lake Sonoma)
California ID WRS
233,642 acre-ft -0.12 120 440
Wishon
California ID WSN
35,397 acre-ft -23.07 49 6560

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Largest Reservoirs

By water storage capacity

The USA is home to many of the largest dams in the world, providing essential services such as water storage, hydropower generation, and flood control. Among them, Oroville Dam stands out as the tallest dam in the United States, located in northern California. Another famous dam is the Hoover Dam, located on the Colorado River between Arizona and Nevada. It is a major tourist attraction and an engineering marvel of the modern era, providing hydropower and water storage for millions of people.

Other notable dams in the USA include the Glen Canyon Dam in Arizona, which is the second-highest concrete arch dam in the country, and the Grand Coulee Dam in Washington, which is the largest electric power-producing facility in the USA. These dams are a critical component of the country's infrastructure, providing essential services for the economy, society, and the environment.

Reservoir Storage Capacity (acre-ft)
Lake Almanor
California ID ALM
954,439 acre-ft
Berryessa
California ID BER
1,251,635 acre-ft
New Bullards Bar
California ID BUL
708,626 acre-ft
Trinity Lake
California ID CLE
1,325,973 acre-ft
Diamond Valley
California ID DMV
663,940 acre-ft
Don Pedro Reservoir
California ID DNP
1,743,826 acre-ft
Folsom Lake
California ID FOL
687,190 acre-ft
New Melones Reservoir
California ID NML
1,901,171 acre-ft
Pine Flat Dam
California ID PNF
712,647 acre-ft
Shasta Dam (Usbr)
California ID SHA
3,379,658 acre-ft
San Luis Reservoir
California ID SNL
1,666,194 acre-ft

Drought Levels

By water storage capacity

The number and distribution of dams and reservoirs in the USA have been significantly impacted by climate change. The changing climate has led to changes in precipitation patterns, increased evaporation rates, and more frequent and severe droughts and floods in certain regions. These factors have influenced the management and operations of dams and reservoirs across the country.

Reservoir Storage Capacity (acre-ft) Percent of Normal (%)

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