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 is 99.3% full as of 2016-07-25

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)
Most recent 2016-07-25 99.3 998.77 520,122 520,122 523,873 16,280
1 day prior 2016-07-24 99.3 998.79 520,448 520,448 523,873 16,285
2 days prior 2016-07-23 99.4 998.81 520,774 520,774 523,873 16,290
1 week prior 2016-07-18 99.8 998.94 522,894 522,894 523,873 16,324
1 month prior 2016-06-25 100.0 999.08 525,181 523,873 523,873 16,360
3 months prior 2016-04-25 97.5 998.19 510,724 510,724 523,873 16,127
6 months prior 2016-01-25 100.0 999.30 528,787 523,873 523,873 16,416
1 year prior 2015-07-25 100.0 999.36 529,773 523,873 523,873 16,432
*

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 2016-07-25 17:30 998.75 999.0 -0.2 below flood pool
1 hour prior 2016-07-25 16:30 998.77 999.0 -0.2 below flood pool
2 hours prior 2016-07-25 15:30 998.77 999.0 -0.2 below flood pool
6 hours prior 2016-07-25 11:30 998.76 999.0 -0.2 below flood pool
12 hours prior 2016-07-25 05:30 998.77 999.0 -0.2 below flood pool
24 hours prior 2016-07-24 17:30 998.79 999.0 -0.2 below flood pool
48 hours prior 2016-07-23 17:30 998.82 999.0 -0.2 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 ft above NGVD29
Conservation pool elevation 999.0 ft above NGVD29
Top of flood gate elevation 1000 ft above NGVD29
Emergency spillway crest elevation 1000 ft above NGVD29
Top of dam elevation 1024 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