Red Bluff Reservoir: 44.5% full as of 2026-09-17

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 2026-09-17 44.5 2,814.34 64,575 64,575 145,165 4,446
Yesterday 2026-09-16 44.6 2,814.37 64,708 64,708 145,165 4,452
2 days ago 2026-09-15 44.6 2,814.38 64,752 64,752 145,165 4,454
1 week ago 2026-09-10 44.7 2,814.42 64,929 64,929 145,165 4,462
1 month ago 2026-08-17 46.4 2,814.98 67,405 67,405 145,165 4,576
3 months ago 2026-06-17 51.3 2,816.46 74,449 74,449 145,165 4,872
6 months ago 2026-03-17 57.0 2,818.11 82,756 82,756 145,165 5,196
1 year ago 2025-09-17 50.6 2,816.24 73,387 73,387 145,165 4,828
*

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 2026-09-17 03:15 2,814.35 2,828.10 -13.75
1 hour prior 2026-09-17 02:15 2,814.34 2,828.10 -13.76
2 hours prior 2026-09-17 01:15 2,814.35 2,828.10 -13.75
6 hours prior 2026-09-16 21:15 2,814.35 2,828.10 -13.75
12 hours prior 2026-09-16 15:15 2,814.40 2,828.10 -13.70
24 hours prior 2026-09-16 03:15 2,814.36 2,828.10 -13.74
48 hours prior 2026-09-15 03:15 2,814.36 2,828.10 -13.74
*

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