Red Bluff Reservoir: 46.4% full as of 2026-08-16

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 2026-08-16 46.4 2,814.98 67,405 67,405 145,165 4,576
Yesterday 2026-08-15 46.5 2,815.00 67,493 67,493 145,165 4,580
2 days ago 2026-08-14 46.5 2,815.01 67,538 67,538 145,165 4,582
1 week ago 2026-08-09 47.3 2,815.26 68,655 68,655 145,165 4,632
1 month ago 2026-07-16 48.5 2,815.62 70,393 70,393 145,165 4,704
3 months ago 2026-05-16 52.8 2,816.93 76,719 76,719 145,165 4,965
6 months ago 2026-02-16 56.4 2,817.95 81,922 81,922 145,165 5,165
1 year ago 2025-08-16 49.8 2,816.01 72,277 72,277 145,165 4,782
*

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 2026-08-16 00:15 2,814.99 2,828.10 -13.11
1 hour prior 2026-08-15 23:15 2,814.99 2,828.10 -13.11
2 hours prior 2026-08-15 22:15 2,815.01 2,828.10 -13.09
6 hours prior 2026-08-15 18:15 2,815.02 2,828.10 -13.08
12 hours prior 2026-08-15 12:15 2,815.01 2,828.10 -13.09
24 hours prior 2026-08-15 00:15 2,814.99 2,828.10 -13.11
48 hours prior 2026-08-14 00:15 2,815.02 2,828.10 -13.08
*

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