Choke Canyon Reservoir: 30.0% full as of 2023-03-22

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)
Today 2023-03-22 30.0 195.76 199,084 199,083 662,820 12,452
Yesterday 2023-03-21 30.0 195.75 198,960 198,959 662,820 12,447
2 days ago 2023-03-20 30.1 195.77 199,209 199,208 662,820 12,457
1 week ago 2023-03-15 30.1 195.78 199,333 199,332 662,820 12,461
1 month ago 2023-02-22 30.6 196.08 203,093 203,092 662,820 12,605
3 months ago 2022-12-22 31.9 196.74 211,517 211,516 662,820 12,915
6 months ago 2022-09-22 34.4 197.97 227,759 227,758 662,820 13,498
1 year ago 2022-03-22 41.3 201.15 273,513 273,512 662,820 15,310
*

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 2023-03-22 16:15 195.75 220.50 -24.75
1 hour prior 2023-03-22 15:15 195.77 220.50 -24.73
2 hours prior 2023-03-22 14:15 195.77 220.50 -24.73
6 hours prior 2023-03-22 10:15 195.75 220.50 -24.75
12 hours prior 2023-03-22 04:15 195.75 220.50 -24.75
24 hours prior 2023-03-21 16:15 195.70 220.50 -24.80
48 hours prior 2023-03-20 16:15 195.74 220.50 -24.76
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1982-01-01
Gauge USGS:08206900
Vertical datum NGVD29
Dead pool elevation 136.40 ft above NGVD29
Service spillway crest elevation 199.50 ft above NGVD29
Top of flood gate elevation 223.20 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

Lake Location