Red Bluff Reservoir: 45.5% full as of 2026-09-05

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 2026-09-05 45.5 2,814.68 66,079 66,079 145,165 4,515
Yesterday 2026-09-04 45.7 2,814.74 66,344 66,344 145,165 4,527
2 days ago 2026-09-03 45.9 2,814.81 66,653 66,653 145,165 4,541
1 week ago 2026-08-29 46.1 2,814.87 66,919 66,919 145,165 4,553
1 month ago 2026-08-05 48.0 2,815.46 69,621 69,621 145,165 4,672
3 months ago 2026-06-05 51.6 2,816.55 74,884 74,884 145,165 4,890
6 months ago 2026-03-05 57.0 2,818.11 82,756 82,756 145,165 5,196
1 year ago 2025-09-05 50.2 2,816.13 72,856 72,856 145,165 4,806
*

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 2026-09-05 20:15 2,814.64 2,828.10 -13.46
1 hour prior 2026-09-05 19:15 2,814.66 2,828.10 -13.44
2 hours prior 2026-09-05 18:15 2,814.68 2,828.10 -13.42
6 hours prior 2026-09-05 14:15 2,814.68 2,828.10 -13.42
12 hours prior 2026-09-05 08:15 2,814.67 2,828.10 -13.43
24 hours prior 2026-09-04 20:15 2,814.72 2,828.10 -13.38
48 hours prior 2026-09-03 20:15 2,814.80 2,828.10 -13.30
*

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
USGS Monitoring Location USGS:08410000

Lake Location