Red Bluff Reservoir: 44.8% full as of 2025-05-06

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

Historical Data

Date Percent Full Mean Water Level
(ft) 		Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft) 		Surface Area
(acres)
Most recent 2025-05-06 44.8 2,814.45 65,062 65,062 145,165 4,468
1 day prior 2025-05-05 43.7 2,814.07 63,381 63,381 145,165 4,391
2 days prior 2025-05-04 43.3 2,813.96 62,895 62,895 145,165 4,369
1 week prior 2025-04-29 43.5 2,814.02 63,160 63,160 145,165 4,381
1 month prior 2025-04-06 40.4 2,812.97 58,616 58,616 145,165 4,174
3 months prior 2025-02-06 39.9 2,812.79 57,888 57,888 145,165 4,142
6 months prior 2024-11-06 36.2 2,811.47 52,550 52,550 145,165 3,905
1 year prior 2024-05-06 38.5 2,812.28 55,826 55,826 145,165 4,051
*

Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

**

   Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.

Most Recent Instantaneous Water Level

Date/time Water Level
(ft) 		Conservation Pool Elevation
(ft) 		Height Above Conservation Pool
(ft)
Most recent 2025-05-06 22:15 2,814.56 2,828.10 -13.54
1 hour prior 2025-05-06 21:15 2,814.57 2,828.10 -13.53
2 hours prior 2025-05-06 20:15 2,814.58 2,828.10 -13.52
6 hours prior 2025-05-06 16:15 2,814.56 2,828.10 -13.54
12 hours prior 2025-05-06 10:15 2,814.46 2,828.10 -13.64
24 hours prior 2025-05-05 22:15 2,814.12 2,828.10 -13.98
48 hours prior 2025-05-04 22:15 2,813.97 2,828.10 -14.13
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1936-01-01
Vertical datum
Start date: 2022-09-13 		NAVD88
Vertical datum
Start date to end date: 1999-04-17 to 2022-09-12 		NGVD29
Service spillway crest elevation
Start date: 2022-09-13 		2,828.10 ft above NAVD88
Service spillway crest elevation
End date: 2022-09-12 		2,827.40 ft above NGVD29
Top of flood gate elevation
Start date: 2022-09-13 		2,843.10 ft above NAVD88
Top of flood gate elevation
End date: 2022-09-12 		2,842.40 ft above NGVD29
Emergency spillway crest elevation
Start date: 2022-09-13 		2,846.10 ft above NAVD88
Emergency spillway crest elevation
End date: 2022-09-12 		2,845.40 ft above NGVD29
Top of dam elevation
Start date: 2022-09-13 		2,857.10 ft above NAVD88
Conservation pool elevation
Start date: 2022-09-13 		2,828.10 ft above NAVD88
Conservation pool elevation
End date: 2022-09-12 		2,827.40 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2011-11-01 (source: TWDB) : GIS Data
Data Source USGS:08410000

Lake Location