Timestamp: 06-01-2026 07:01:05
DIVISION OF OPERATIONS AND MAINTENANCE
SUMMARY OF SWP RESERVOIR
05-25-2026 to 05-31-2026
All Values in (AF)
| Oroville Complex | This Week Maximum Day | This Week Minimum Day | 05-31-2026 Reading | Total for Week |
|---|---|---|---|---|
| Inflow To Lake Oroville | 6,814 | 4,274 | 5,323 | 39,761 |
| Total Releases from Hyatt Power Plant (Includes Pumpack) | 11,871 | 7,670 | 9,115 | 68,362 |
| River Valve Flow | 0 | 0 | 0 | 0 |
| Spill | 0 | 0 | 0 | 0 |
| Storage | 3,356,796 | 3,331,618 | 3,331,618 | - |
| Flood Control - Amount of Encroachment | 0 | 0 | 0 | - |
| Releases to Feather River (Sum of River Outlet and Diversion Dam Releases) | 5,951 | 3,335 | 5,951 | 36,384 |
| Releases to Feather River for Flood Control | - | - | - | - |
| Reservoir Storage | Operational Capacity | This Year Maximum Storage (1) | This Year Minimum Storage (1) | Average Storage (2) | 05-31-2026 Reading | Net Change this Week (3) |
|---|---|---|---|---|---|---|
| Frenchman Lake | 55,475 | 57,038 | 46,498 | 41,715 | 54,003 | -671 |
| Lake Davis | 84,371 | 83,169 | 72,982 | 66,208 | 81,542 | -237 |
| Antelope Lake | 22,564 | 23,609 | 19,328 | 22,149 | 22,222 | -74 |
| Lake Oroville | 3,440,276 | 3,384,884 | 2,404,046 | 2,886,540 | 3,331,618 | -30,081 |
| Lake Del Valle | 39,914 | 40,418 | 28,778 | 39,771 | 39,794 | -78 |
| San Luis Reservoir Total | 2,027,835 | 1,815,496 | 1,405,750 | 1,463,236 | 1,502,980 | -62,781 |
| DWR | 1,062,180 | 1,063,619 | 776,000 | 790,939 | 776,000 | -32,358 |
| USBR | 965,655 | 784,781 | 445,304 | 672,298 | 726,980 | -30,423 |
| Pyramid Lake | 169,901 | 169,025 | 150,446 | 163,809 | 165,396 | 3,376 |
| Castaic Lake | 319,247 | 298,464 | 248,811 | 282,244 | 297,038 | 2,882 |
| Silverwood Lake | 74,970 | 72,436 | 49,526 | 69,282 | 71,987 | -143 |
| Lake Perris | 132,614 | 124,647 | 107,043 | 104,371 | 117,643 | 245 |
| Total (4) | 5,401,512 | 5,317,309 | 3,903,458 | 4,467,028 | 4,957,243 | -57,139 |
Data is preliminary and subject to revision.
Footnotes
- (1)
- Maximum and Minimum storage in the year the week begins (2026).
- (2)
- Average storage for each 05/31 from 1979 through 2026.
- (3)
- Since 05-24-2026.
- (4)
- Does not include USBR San Luis Reservoir storage.