Red Bluff Reservoir: 48.1% full as of 2026-08-02

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 2026-08-02 48.1 2,815.51 69,862 69,862 145,165 4,682
Yesterday 2026-08-01 48.2 2,815.52 69,911 69,911 145,165 4,684
2 days ago 2026-07-31 48.2 2,815.54 70,007 70,007 145,165 4,688
1 week ago 2026-07-26 48.4 2,815.60 70,297 70,297 145,165 4,700
1 month ago 2026-07-02 49.7 2,815.99 72,180 72,180 145,165 4,778
3 months ago 2026-05-02 54.0 2,817.28 78,428 78,428 145,165 5,035
6 months ago 2026-02-02 55.4 2,817.66 80,409 80,409 145,165 5,108
1 year ago 2025-08-02 50.2 2,816.12 72,808 72,808 145,165 4,804
*

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 2026-08-02 15:15 2,815.52 2,828.10 -12.58
1 hour prior 2026-08-02 14:15 2,815.52 2,828.10 -12.58
2 hours prior 2026-08-02 13:15 2,815.52 2,828.10 -12.58
6 hours prior 2026-08-02 09:15 2,815.50 2,828.10 -12.60
12 hours prior 2026-08-02 03:15 2,815.50 2,828.10 -12.60
24 hours prior 2026-08-01 15:15 2,815.53 2,828.10 -12.57
48 hours prior 2026-07-31 15:15 2,815.55 2,828.10 -12.55
*

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