Choke Canyon Reservoir: 27.8% full as of 2018-05-21

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 2018-05-21 27.8 194.52 184,022 184,021 662,820 11,851
Yesterday 2018-05-20 27.5 194.40 182,602 182,601 662,820 11,799
2 days ago 2018-05-19 27.5 194.35 182,014 182,013 662,820 11,776
1 week ago 2018-05-14 27.8 194.54 184,259 184,258 662,820 11,860
1 month ago 2018-04-21 28.3 194.83 187,718 187,717 662,820 11,994
3 months ago 2018-02-21 29.5 195.49 195,740 195,739 662,820 12,319
6 months ago 2017-11-21 31.4 196.47 208,046 208,045 662,820 12,793
1 year ago 2017-05-21 37.4 199.43 247,999 247,998 662,820 14,300
*

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 2018-05-21 16:15 194.47 220.5 -26.0 below flood pool
1 hour prior 2018-05-21 15:15 194.44 220.5 -26.1 below flood pool
2 hours prior 2018-05-21 14:15 194.54 220.5 -26.0 below flood pool
6 hours prior 2018-05-21 10:15 194.49 220.5 -26.0 below flood pool
12 hours prior 2018-05-21 04:15 194.53 220.5 -26.0 below flood pool
24 hours prior 2018-05-20 16:15 194.30 220.5 -26.2 below flood pool
48 hours prior 2018-05-19 16:15 194.32 220.5 -26.2 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1982-01-01
Vertical datum NGVD29
Gauge USGS:08206900
Dead pool elevation 136.4 ft above NGVD29
Service spillway crest elevation 199.5 ft above NGVD29
Top of flood gate elevation 223.2 ft above NGVD29
Emergency spillway crest elevation 223.2 ft above NGVD29
Maximum design elevation 232.2 ft above NGVD29
Top of dam elevation 241.1 ft above NGVD29
Conservation pool elevation 220.5 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