Red Bluff Reservoir: 48.2% full as of 2026-07-30

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 2026-07-30 48.2 2,815.54 70,007 70,007 145,165 4,688
Yesterday 2026-07-29 48.3 2,815.56 70,104 70,104 145,165 4,692
2 days ago 2026-07-28 48.3 2,815.57 70,152 70,152 145,165 4,694
1 week ago 2026-07-23 48.5 2,815.63 70,442 70,442 145,165 4,706
1 month ago 2026-06-30 49.8 2,816.00 72,228 72,228 145,165 4,780
3 months ago 2026-04-30 53.7 2,817.18 77,926 77,926 145,165 5,015
6 months ago 2026-01-30 55.1 2,817.58 79,992 79,992 145,165 5,093
1 year ago 2025-07-30 50.3 2,816.15 72,953 72,953 145,165 4,810
*

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 2026-07-30 15:15 2,815.56 2,828.10 -12.54
1 hour prior 2026-07-30 14:15 2,815.56 2,828.10 -12.54
2 hours prior 2026-07-30 13:15 2,815.56 2,828.10 -12.54
6 hours prior 2026-07-30 09:15 2,815.53 2,828.10 -12.57
12 hours prior 2026-07-30 03:15 2,815.54 2,828.10 -12.56
24 hours prior 2026-07-29 15:15 2,815.57 2,828.10 -12.53
48 hours prior 2026-07-28 15:15 2,815.58 2,828.10 -12.52
*

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