Choke Canyon Reservoir is 35.8% full as of 2016-07-30

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, while 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.

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Today 2016-07-30 35.8 198.20 249,013 249,004 695,262 14,164
Yesterday 2016-07-29 35.8 198.18 248,733 248,724 695,262 14,150
2 days ago 2016-07-28 35.7 198.15 248,312 248,303 695,262 14,130
1 week ago 2016-07-23 36.0 198.28 250,151 250,142 695,262 14,222
1 month ago 2016-06-30 37.6 199.07 261,627 261,618 695,262 14,778
3 months ago 2016-04-30 33.5 197.06 233,250 233,241 695,262 13,522
6 months ago 2016-01-30 33.4 196.99 232,305 232,296 695,262 13,487
1 year ago 2015-07-30 38.7 199.57 269,088 269,079 695,262 15,083
*

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 2016-07-30 11:15 198.13 220.5 -22.4 below flood pool
1 hour prior 2016-07-30 10:15 198.14 220.5 -22.4 below flood pool
2 hours prior 2016-07-30 09:15 198.16 220.5 -22.3 below flood pool
6 hours prior 2016-07-30 05:15 198.24 220.5 -22.3 below flood pool
12 hours prior 2016-07-29 23:15 198.15 220.5 -22.3 below flood pool
24 hours prior 2016-07-29 11:15 198.14 220.5 -22.4 below flood pool
48 hours prior 2016-07-28 11:15 198.12 220.5 -22.4 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
Conservation pool elevation 220.5 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 232.18 ft above NGVD29
Top of dam elevation 241.14 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