Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| South Fork Diversion 63-004 Dam | Dam | 1064 | Plumas | 39 38 48 N | 121 07 10 W |
| South Haiwee Dam | Dam | 1146 | Inyo | 36 08 13 N | 117 57 03 W |
| South Jetty | Dam | 0 | Humboldt | 40 45 45 N | 124 14 27 W |
| South Log Pond 268 Dam | Dam | 89 | Tehama | 40 08 18 N | 122 12 46 W |
| South Saddle Dam | Dam | 92 | Sonoma | 38 26 56 N | 122 39 08 W |
| South Spillway | Dam | 175 | Calaveras | 38 15 10 N | 120 50 49 W |
| Sowvlen 1237 Dam | Dam | 1643 | Lassen | 41 04 36 N | 120 37 52 W |
| Spaulding 1246 Dam | Dam | 1638 | Lassen | 40 55 30 N | 120 56 40 W |
| Spaulding 3 Dam | Dam | 1449 | Modoc | 41 30 30 N | 121 07 34 W |
| Spicers Meadow 99-004 Dam | Dam | 1961 | Tuolumne | 38 23 36 N | 119 59 49 W |
| Spooner 1249-005 Dam | Dam | 1689 | Lassen | 41 00 54 N | 120 37 52 W |
| Spring 687-002 Dam | Dam | 364 | Madera | 37 10 54 N | 119 46 10 W |
| Spring Creek Dam | Dam | 245 | Shasta | 40 37 48 N | 122 28 27 W |
| Spring Valley 396 Dam | Dam | 357 | Lake | 39 04 24 N | 122 35 34 W |
| Spring Valley Lake 1-073 Dam | Dam | 1912 | Plumas | 40 00 50 N | 121 23 19 W |
| Spring Valley Ranch 1321 Dam | Dam | 654 | Placer | 39 05 54 N | 120 58 16 W |
| Squaw Lake Dike Dam | Dam | 65 | Imperial | 32 54 18 N | 114 28 39 W |
| Squaw Tank Dam | Dam | 360 | Riverside | 33 55 00 N | 116 40 03 W |
| Squires Dam | Dam | 155 | San Diego | 33 09 03 N | 117 15 35 W |
| Stampede Dam | Dam | 1743 | Sierra | 39 28 12 N | 120 06 16 W |
| Stampede Dam | Dam | 1814 | Sierra | 39 28 30 N | 120 06 14 W |
| Stampede Dike Dam | Dam | 1818 | Sierra | 39 28 06 N | 120 06 40 W |
| Stanford Heights 10-013 Dam | Dam | 195 | San Francisco | 37 44 30 N | 122 27 10 W |
| Stanislaus Forebay 97-083 Dam | Dam | 795 | Tuolumne | 38 08 48 N | 120 21 16 W |
| Stevens Creek 72-007 Dam | Dam | 144 | Santa Clara | 37 17 54 N | 122 04 40 W |
| Stewart Canyon Debris Dam | Dam | 285 | Ventura | 34 27 30 N | 119 15 03 W |
| Stinson Weir 696 | Dam | 61 | Fresno | 36 27 36 N | 119 59 34 W |
| Stockton Creek 672 Dam | Dam | 693 | Mariposa | 37 29 54 N | 119 57 34 W |
| Stone Canyon 6-025 Dam | Dam | 257 | Los Angeles | 34 06 24 N | 118 27 09 W |
| Stony Creek Gravel 2005 Dam | Dam | 44 | Glenn | 39 42 42 N | 122 00 28 W |
| Stony Gorge Dam | Dam | 275 | Glenn | 39 35 06 N | 122 31 58 W |
| Stony Gorge Dam | Dam | 243 | Glenn | 39 35 11 N | 122 31 57 W |
| Stony Ridge Lake 1-032 Dam | Dam | 2382 | El Dorado | 38 58 54 N | 120 08 28 W |
| Stough Debris Dam | Dam | 309 | Los Angeles | 34 12 00 N | 118 18 15 W |
| Straza 3462 Dam | Dam | 260 | El Dorado | 38 50 12 N | 120 58 40 W |
| Success Dam | Dam | 207 | Tulare | 36 03 38 N | 118 55 09 W |
| Sulphur Creek 1039 Dam | Dam | 58 | Orange | 33 32 59 N | 117 42 22 W |
| Summit 31-012 Dam | Dam | 248 | Alameda | 37 54 20 N | 122 16 16 W |
| Summit Lake Dam | Dam | 2484 | Alpine | 38 35 48 N | 119 54 04 W |
| Summit Reservoir 14-007 Dam | Dam | 120 | Solano | 38 09 12 N | 122 13 34 W |
| Sunflower 1261 Dam | Dam | 292 | Tehama | 40 04 24 N | 122 35 10 W |
| Sunrise 1290 Dam | Dam | 1524 | Sierra | 39 31 00 N | 120 00 28 W |
| Sunset Debris Dam | Dam | 294 | Los Angeles | 34 11 42 N | 118 17 45 W |
| Sunset North Basin 10-023 Dam | Dam | 116 | San Francisco | 37 45 06 N | 122 29 04 W |
| Sunset South Basin 10-025 Dam | Dam | 116 | San Francisco | 37 45 00 N | 122 29 04 W |
| Sutherland 8-010 Dam | Dam | 606 | San Diego | 33 07 06 N | 116 47 13 W |
| Sutherland Dam | Dam | 606 | San Diego | 33 07 06 N | 116 47 13 W |
| Sutro Reservoir 10-024 Dam | Dam | 153 | San Francisco | 37 45 06 N | 122 27 18 W |
| Suttenfield 1-018 Dam | Dam | 100 | Sonoma | 38 21 18 N | 122 30 46 W |
| Swains Hole Dam | Dam | 1621 | Lassen | 40 40 49 N | 121 16 12 W |
| Swan 1301 Dam | Dam | 478 | Nevada | 39 08 06 N | 121 08 04 W |
| Swanzy Lake 14-005 Dam | Dam | 80 | Solano | 38 04 36 N | 122 13 34 W |
| Sweasey Dam (historical) | Dam | 48 | Humboldt | 40 49 10 N | 123 57 22 W |
| Sweetwater Falls Dam | Dam | 414 | San Diego | 32 46 56 N | 116 47 34 W |
| Sweetwater Main 2020 Dam | Dam | 58 | San Diego | 32 41 29 N | 117 00 29 W |
| Sworinger 1257 Dam | Dam | 1787 | Lassen | 41 10 49 N | 120 05 55 W |
| Sycamore 1003-005 Dam | Dam | 310 | Riverside | 33 57 12 N | 117 20 39 W |
| Sycamore Reservoir Dam | Dam | 341 | Monterey | 35 50 00 N | 121 08 04 W |
| Syphon Canyon 793-009 Dam | Dam | 123 | Orange | 33 42 36 N | 117 43 57 W |
| Tachevah Creek Detention Dam | Dam | 132 | Riverside | 33 50 00 N | 116 30 21 W |
| Tamarac Lake 513-005 Dam | Dam | 2398 | Alpine | 38 36 48 N | 119 53 58 W |
| Tanner 1490 Dam | Dam | 1134 | Calaveras | 38 13 54 N | 120 22 40 W |
| Taylor Creek Number 1 114 Dam | Dam | 1265 | Modoc | 41 13 34 N | 121 11 32 W |
| Taylor Lake 288 Dam | Dam | 2075 | Plumas | 40 09 14 N | 120 43 07 W |
| Taylor Number 2 763-003 Dam | Dam | 115 | Ventura | 34 19 36 N | 119 18 21 W |
| Taylor Weir | Dam | 65 | Tulare | 36 03 17 N | 119 29 15 W |
| Tejon Storage Number 1 734 Dam | Dam | 414 | Kern | 35 02 08 N | 118 44 48 W |
| Tejon Storage Number 2 734-002 Dam | Dam | 532 | Kern | 35 01 26 N | 118 43 11 W |
| Telephone Flat Reservoir Dam | Dam | 1525 | Modoc | 41 46 36 N | 120 41 25 W |
| Tennessee Valley Dam | Dam | 13 | Marin | 37 50 36 N | 122 33 04 W |
| Terminal 1055-002 Dam | Dam | 92 | San Luis Obispo | 35 10 12 N | 120 32 04 W |
| Terminal Dam | Dam | 41 | Solano | 38 13 12 N | 122 09 40 W |
| Terminus Dam | Dam | 159 | Tulare | 36 25 01 N | 119 00 12 W |
| Thermalito Afterbay 1-055 Dam | Dam | 36 | Butte | 39 27 00 N | 121 38 04 W |
| Thermalito Diversion 1-049 Dam | Dam | 203 | Butte | 39 33 06 N | 121 32 40 W |
| Thermalito Diversion Dam | Dam | 66 | Butte | 39 31 43 N | 121 32 36 W |
| Thermalito Forebay 1-054 Dam | Dam | 71 | Butte | 39 31 36 N | 121 36 04 W |
| Thing Valley 856 Dam | Dam | 1370 | San Diego | 32 47 12 N | 116 23 03 W |
| Thomas Briles 171 Dam | Dam | 1601 | Modoc | 41 46 06 N | 120 21 13 W |
| Thompson 2411 Dam | Dam | 80 | Napa | 38 19 42 N | 122 08 22 W |
| Thompson Creek Dam | Dam | 502 | Los Angeles | 34 08 24 N | 117 42 41 W |
| Thompson Dam | Dam | 180 | Los Angeles | 33 21 19 N | 118 26 42 W |
| Three Corners Dam | Dam | 1067 | San Benito | 36 27 18 N | 120 54 16 W |
| Three J Ranch 590 Dam | Dam | 166 | Alameda | 37 43 12 N | 121 56 52 W |
| Tiger Creek Afterbay 97-105 Dam | Dam | 712 | Amador | 38 26 30 N | 120 30 19 W |
| Tiger Creek Forebay 97-126 Dam | Dam | 1079 | Amador | 38 27 12 N | 120 28 40 W |
| Tiger Creek Regulator 97-104 Dam | Dam | 1062 | Amador | 38 28 36 N | 120 27 10 W |
| Timberhill Lake 419 Dam | Dam | 319 | Napa | 38 21 36 N | 122 13 28 W |
| Tinemaha 6-026 Dam | Dam | 1187 | Inyo | 37 03 19 N | 118 13 37 W |
| Tioga Lake 104-040 Dam | Dam | 2940 | Mono | 37 55 36 N | 119 15 05 W |
| Tisdale Weir | Dam | 10 | Sutter | 39 01 30 N | 121 49 19 W |
| Top Cat 1260 Dam | Dam | 92 | Tehama | 39 56 12 N | 122 13 04 W |
| Toreson 153 Dam | Dam | 1412 | Modoc | 41 23 30 N | 120 49 16 W |
| Towibalyla 424 Dam | Dam | 163 | Sonoma | 38 37 30 N | 122 39 40 W |
| Trampas Canyon 1795-006 Dam | Dam | 166 | Orange | 33 29 54 N | 117 35 15 W |
| Treatment Ponds 3223 Dam | Dam | 136 | Shasta | 40 26 24 N | 122 15 34 W |
| Trinity Dam | Dam | 721 | Trinity | 40 48 04 N | 122 45 48 W |
| Truett 2221 Dam | Dam | 1050 | Shasta | 40 29 12 N | 121 53 52 W |
| Tule Lake 1249-004 Dam | Dam | 1683 | Lassen | 41 04 60 N | 120 22 04 W |
| Tulloch 62-006 Dam | Dam | 129 | Calaveras | 37 52 30 N | 120 36 16 W |
| Tulloch Dam | Dam | 126 | Tuolumne | 37 52 35 N | 120 36 18 W |
| Tuolumne Log Pond 558 Dam | Dam | 781 | Tuolumne | 37 57 30 N | 120 14 40 W |
| Turlock Lake 68-003 Dam | Dam | 74 | Stanislaus | 37 36 43 N | 120 35 39 W |
| Turner 1074 Dam | Dam | 316 | San Diego | 33 13 24 N | 117 04 51 W |
| Twaine Harte 551 Dam | Dam | 1060 | Tuolumne | 38 01 42 N | 120 14 40 W |
| Twin Lakes 97-069 Dam | Dam | 2485 | Alpine | 38 36 24 N | 119 55 58 W |
| Twitchell Dam | Dam | 204 | Santa Barbara | 34 59 14 N | 120 19 24 W |
| U S-Hertz Inc 1235 Dam | Dam | 1363 | Lassen | 40 02 36 N | 120 10 04 W |
| Union 99-005 Dam | Dam | 2089 | Alpine | 38 25 47 N | 119 59 52 W |
| Union Valley 1009-003 Dam | Dam | 1535 | El Dorado | 38 52 05 N | 120 26 39 W |