Notes

2015-06-17: The elevation for the top of the conservation pool for Possum Kingdom Reservoir has been set to the reservoir's normal maximum operating elevation of 999.0 feet. The calculation for percent full is now based on this elevation. Also, the January 1942 USGS rating curve was replaced with newly acquired rating curves with links at the bottom of this page.

Possum Kingdom Lake: 86.8% full as of 2022-10-04

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 2022-10-04 86.8 994.80 467,068 467,068 538,139 15,803
Yesterday 2022-10-03 86.9 994.83 467,543 467,543 538,139 15,823
2 days ago 2022-10-02 87.0 994.86 468,018 468,018 538,139 15,844
1 week ago 2022-09-27 87.6 995.07 471,360 471,360 538,139 15,978
1 month ago 2022-09-04 87.8 995.14 472,480 472,480 538,139 16,021
3 months ago 2022-07-04 93.7 997.06 504,248 504,248 538,139 17,019
6 months ago 2022-04-04 94.3 997.25 507,490 507,490 538,139 17,111
1 year ago 2021-10-04 98.5 998.54 529,948 529,948 538,139 17,700
*

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 2022-10-04 11:15 994.78 999.00 -4.22 below operating pool
1 hour prior 2022-10-04 10:15 994.79 999.00 -4.21 below operating pool
2 hours prior 2022-10-04 09:15 994.79 999.00 -4.21 below operating pool
6 hours prior 2022-10-04 05:15 994.80 999.00 -4.20 below operating pool
12 hours prior 2022-10-03 23:15 994.81 999.00 -4.19 below operating pool
24 hours prior 2022-10-03 11:15 994.84 999.00 -4.16 below operating pool
48 hours prior 2022-10-02 11:15 994.86 999.00 -4.14 below operating pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1941-01-01
Gauge USGS:08088500
Vertical datum NGVD29
Dead pool elevation 874.80 ft above NGVD29
Service spillway crest elevation 987.00 ft above NGVD29
Top of flood gate elevation 1,000.00 ft above NGVD29
Emergency spillway crest elevation 1,000.00 ft above NGVD29
Top of dam elevation 1,024.00 ft above NGVD29
Conservation pool elevation 999.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1939-01-01 (source: BRA)
1944-01-01 (source: TWDB)
1962-01-01 (source: BRA)
1974-01-01 (source: BRA)
1994-06-01 (source: TWDB) : GIS Data
2005-01-01 (source: TWDB) : GIS Data
2016-12-01 (source: TWDB) : GIS Data

Lake Location