Recent changes

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: 100.0% full as of 2018-12-15

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 2018-12-15 100.0 999.16 541,012 538,139 538,139 17,997
Yesterday 2018-12-14 100.0 999.06 539,215 538,139 538,139 17,945
2 days ago 2018-12-13 99.7 998.92 536,708 536,708 538,139 17,876
1 week ago 2018-12-08 100.0 999.26 542,814 538,139 538,139 18,051
1 month ago 2018-11-15 99.3 998.80 534,565 534,565 538,139 17,819
3 months ago 2018-09-15 95.1 997.51 511,955 511,955 538,139 17,236
6 months ago 2018-06-15 95.4 997.59 513,335 513,335 538,139 17,273
1 year ago 2017-12-15 95.9 997.76 516,279 516,279 538,139 17,351
*

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 2018-12-15 12:30 999.21 999.0 0.2 into flood pool
1 hour prior 2018-12-15 11:30 999.20 999.0 0.2 into flood pool
2 hours prior 2018-12-15 10:30 999.19 999.0 0.2 into flood pool
6 hours prior 2018-12-15 06:30 999.16 999.0 0.2 into flood pool
12 hours prior 2018-12-15 00:30 999.13 999.0 0.1 into flood pool
24 hours prior 2018-12-14 12:30 999.05 999.0 0.0 into flood pool
48 hours prior 2018-12-13 12:30 998.95 999.0 -0.0 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1941-01-01
Vertical datum NGVD29
Gauge USGS:08088500
Dead pool elevation 874.8 ft above NGVD29
Service spillway crest elevation 987.0 ft above NGVD29
Top of flood gate elevation 1,000.0 ft above NGVD29
Emergency spillway crest elevation 1,000.0 ft above NGVD29
Top of dam elevation 1,024.0 ft above NGVD29
Conservation pool elevation 999.0 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