Red Bluff Reservoir: 50.2% full as of 2025-07-23

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)
Today 2025-07-23 50.2 2,816.13 72,856 72,856 145,165 4,806
Yesterday 2025-07-22 50.2 2,816.13 72,856 72,856 145,165 4,806
2 days ago 2025-07-21 50.2 2,816.13 72,856 72,856 145,165 4,806
1 week ago 2025-07-16 50.3 2,816.15 72,953 72,953 145,165 4,810
1 month ago 2025-06-23 45.4 2,814.65 65,946 65,946 145,165 4,509
3 months ago 2025-04-23 40.3 2,812.95 58,535 58,535 145,165 4,171
6 months ago 2025-01-23 39.2 2,812.54 56,877 56,877 145,165 4,097
1 year ago 2024-07-23 36.5 2,811.59 53,035 53,035 145,165 3,927
*

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 2025-07-23 11:15 2,816.15 2,828.10 -11.95
1 hour prior 2025-07-23 10:15 2,816.14 2,828.10 -11.96
2 hours prior 2025-07-23 09:15 2,816.13 2,828.10 -11.97
6 hours prior 2025-07-23 05:15 2,816.12 2,828.10 -11.98
12 hours prior 2025-07-22 23:15 2,816.12 2,828.10 -11.98
24 hours prior 2025-07-22 11:15 2,816.15 2,828.10 -11.95
48 hours prior 2025-07-21 11:15 2,816.12 2,828.10 -11.98
*

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 gate elevation
Start date: 2022-09-13 		2,843.10 ft above NAVD88
Top of 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
Top of dam elevation
End date: 2022-09-12 		2,856.40 ft above NGVD29
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