Wright Patman Lake: 94.6% full as of 2017-04-29

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.

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 2017-04-29 94.6 227.00 293,675 293,628 310,382 - n.a. -
1 day prior 2017-04-28 96.1 227.14 298,319 298,272 310,382 - n.a. -
2 days prior 2017-04-27 98.0 227.32 304,342 304,295 310,382 - n.a. -
1 week prior 2017-04-22 94.5 226.99 293,345 293,298 310,382 - n.a. -
1 month prior 2017-03-29 100.0 224.40 214,427 122,593 122,593 - n.a. -
3 months prior 2017-01-29 100.0 225.17 236,522 122,593 122,593 - n.a. -
6 months prior 2016-10-29 100.0 224.35 213,035 135,069 135,069 - n.a. -
1 year prior 2016-04-29 100.0 249.65 1,542,621 310,382 310,382 - n.a. -
*

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 2017-04-29 23:00 226.97 227.5 -0.5 below flood pool
1 hour prior 2017-04-29 22:00 226.94 227.5 -0.6 below flood pool
2 hours prior 2017-04-29 21:00 226.95 227.5 -0.6 below flood pool
6 hours prior 2017-04-29 17:00 226.97 227.5 -0.5 below flood pool
12 hours prior 2017-04-29 11:00 226.99 227.5 -0.5 below flood pool
24 hours prior 2017-04-28 23:00 227.07 227.5 -0.4 below flood pool
48 hours prior 2017-04-27 23:00 227.25 227.5 -0.2 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1954-01-01
Vertical datum NGVD29
Gauge USGS:07344200
Dead pool elevation 200.0 ft above NGVD29
Conservation pool elevation
ending 1990-01-01
220.0 ft above NGVD29
Conservation pool elevation
1990-01-01 to 1990-04-01
220.6 ft above NGVD29
Conservation pool elevation
seasonal: April 1 to June 1 starting 1990-04-01
227.5 ft above NGVD29
Conservation pool elevation
seasonal: June 1 to October 5 starting 1990-04-01
225.0 ft above NGVD29
Conservation pool elevation
seasonal: October 5 to November 1 starting 1990-04-01
221.2 ft above NGVD29
Conservation pool elevation
seasonal: November 1 to April 1 starting 1990-04-01
220.6 ft above NGVD29
Emergency spillway crest elevation 259.5 ft above NGVD29
Flood pool elevation 259.5 ft above NGVD29
Maximum design elevation 278.9 ft above NGVD29
Top of dam elevation 286 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1997-01-01 (source: twdb) : GIS Data

Lake Location