Choke Canyon Reservoir: 37.1% full as of 2020-10-19

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 2020-10-19 37.1 199.28 245,862 245,861 662,820 14,188
1 day prior 2020-10-18 37.1 199.30 246,145 246,144 662,820 14,202
2 days prior 2020-10-17 37.2 199.34 246,715 246,714 662,820 14,232
1 week prior 2020-10-12 37.4 199.44 248,142 248,141 662,820 14,307
1 month prior 2020-09-19 38.4 199.88 254,502 254,501 662,820 14,600
3 months prior 2020-07-19 40.6 200.85 268,944 268,943 662,820 15,154
6 months prior 2020-04-19 43.9 202.26 290,819 290,818 662,820 15,847
1 year prior 2019-10-19 47.3 203.65 313,234 313,233 662,820 16,399
*

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 2020-10-19 06:00 199.31 220.50 -21.19 below flood pool
1 hour prior 2020-10-19 05:00 - n.a. - - n.a. - - n.a. - into flood pool
2 hours prior 2020-10-19 04:00 - n.a. - - n.a. - - n.a. - into flood pool
6 hours prior 2020-10-19 00:00 - n.a. - - n.a. - - n.a. - into flood pool
12 hours prior 2020-10-18 18:00 - n.a. - - n.a. - - n.a. - into flood pool
24 hours prior 2020-10-18 06:00 199.32 220.50 -21.18 below flood pool
48 hours prior 2020-10-17 06:00 199.34 220.50 -21.16 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 136.40 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