Choke Canyon Reservoir: 14.5% full as of 2025-05-08

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

Historical Data

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Most recent 2025-05-08 14.5 185.67 95,852 95,851 662,820 8,109
1 day prior 2025-05-07 14.5 185.69 96,014 96,013 662,820 8,118
2 days prior 2025-05-06 14.5 185.71 96,176 96,175 662,820 8,126
1 week prior 2025-05-01 14.6 185.80 96,909 96,908 662,820 8,166
1 month prior 2025-04-08 15.2 186.23 100,463 100,462 662,820 8,364
3 months prior 2025-02-08 16.3 187.10 107,905 107,904 662,820 8,738
6 months prior 2024-11-08 17.8 188.19 117,666 117,665 662,820 9,175
1 year prior 2024-05-08 22.8 191.55 150,811 150,810 662,820 10,544
*

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 2025-05-08 22:15 185.67 220.50 -34.83
1 hour prior 2025-05-08 21:15 185.68 220.50 -34.82
2 hours prior 2025-05-08 20:15 185.59 220.50 -34.91
6 hours prior 2025-05-08 16:15 185.65 220.50 -34.85
12 hours prior 2025-05-08 10:15 185.68 220.50 -34.82
24 hours prior 2025-05-07 22:15 185.65 220.50 -34.85
48 hours prior 2025-05-06 22:15 185.69 220.50 -34.81
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1982-01-01
Vertical datum NGVD29
Dead pool elevation 136.40 ft above NGVD29
Service spillway crest elevation 199.50 ft above NGVD29
Emergency spillway crest elevation 223.20 ft above NGVD29
Maximum design elevation 232.18 ft above NGVD29
Top of dam elevation 241.14 ft above NGVD29
Conservation pool elevation 220.50 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1983-01-01 (source: USBR)
1993-03-01 (source: TWDB) : GIS Data
2012-06-01 (source: TWDB) : GIS Data
Data Source USGS:08206900

Lake Location