Choke Canyon Reservoir: 30.6% full as of 2018-09-21

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 2018-09-21 30.6 196.08 203,093 203,092 662,820 12,605
Yesterday 2018-09-20 30.4 195.96 201,584 201,583 662,820 12,548
2 days ago 2018-09-19 29.9 195.68 198,089 198,088 662,820 12,413
1 week ago 2018-09-14 25.2 193.02 166,750 166,749 662,820 11,158
1 month ago 2018-08-21 24.0 192.30 158,832 158,831 662,820 10,843
3 months ago 2018-06-21 26.5 193.78 175,372 175,371 662,820 11,526
6 months ago 2018-03-21 29.1 195.26 192,920 192,919 662,820 12,203
1 year ago 2017-09-21 32.2 196.89 213,459 213,458 662,820 12,984
*

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 2018-09-21 23:15 196.22 220.5 -24.3 below flood pool
1 hour prior 2018-09-21 22:15 196.19 220.5 -24.3 below flood pool
2 hours prior 2018-09-21 21:15 196.18 220.5 -24.3 below flood pool
6 hours prior 2018-09-21 17:15 196.13 220.5 -24.4 below flood pool
12 hours prior 2018-09-21 11:15 196.08 220.5 -24.4 below flood pool
24 hours prior 2018-09-20 23:15 196.02 220.5 -24.5 below flood pool
48 hours prior 2018-09-19 23:15 195.85 220.5 -24.7 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