Choke Canyon Reservoir: 47.0% full as of 2021-09-23

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 2021-09-23 47.0 203.56 311,760 311,759 662,820 16,363
Yesterday 2021-09-22 47.1 203.60 312,414 312,413 662,820 16,379
2 days ago 2021-09-21 47.3 203.65 313,234 313,233 662,820 16,399
1 week ago 2021-09-16 47.5 203.75 314,876 314,875 662,820 16,439
1 month ago 2021-08-23 48.9 204.32 324,311 324,310 662,820 16,668
3 months ago 2021-06-23 48.9 204.32 324,311 324,310 662,820 16,668
6 months ago 2021-03-23 33.7 197.65 223,464 223,463 662,820 13,345
1 year ago 2020-09-23 38.2 199.81 253,482 253,481 662,820 14,556
*

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 2021-09-23 18:15 203.55 220.50 -16.95 below flood pool
1 hour prior 2021-09-23 17:15 203.55 220.50 -16.95 below flood pool
2 hours prior 2021-09-23 16:15 203.57 220.50 -16.93 below flood pool
6 hours prior 2021-09-23 12:15 203.57 220.50 -16.93 below flood pool
12 hours prior 2021-09-23 06:15 203.56 220.50 -16.94 below flood pool
24 hours prior 2021-09-22 18:15 203.58 220.50 -16.92 below flood pool
48 hours prior 2021-09-21 18:15 203.65 220.50 -16.85 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