Possum Kingdom Lake: 86.2% full as of 2026-09-20

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 2026-09-20 86.2 994.59 463,764 463,764 538,139 15,669
Yesterday 2026-09-19 86.2 994.60 463,920 463,920 538,139 15,675
2 days ago 2026-09-18 86.3 994.64 464,549 464,549 538,139 15,700
1 week ago 2026-09-13 86.9 994.85 467,860 467,860 538,139 15,837
1 month ago 2026-08-20 90.0 995.87 484,331 484,331 538,139 16,437
3 months ago 2026-06-20 94.3 997.26 507,661 507,661 538,139 17,116
6 months ago 2026-03-20 91.3 996.29 491,280 491,280 538,139 16,657
1 year ago 2025-09-20 96.2 997.84 517,668 517,668 538,139 17,387
*

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 2026-09-20 03:45 994.58 999.00 -4.42 below operating pool
1 hour prior 2026-09-20 02:45 994.58 999.00 -4.42 below operating pool
2 hours prior 2026-09-20 01:45 994.58 999.00 -4.42 below operating pool
6 hours prior 2026-09-19 21:45 994.57 999.00 -4.43 below operating pool
12 hours prior 2026-09-19 15:45 994.61 999.00 -4.39 below operating pool
24 hours prior 2026-09-19 03:45 994.61 999.00 -4.39 below operating pool
48 hours prior 2026-09-18 03:45 994.64 999.00 -4.36 below operating pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1941-01-01
Vertical datum NGVD29
Dead pool elevation 874.80 ft above NGVD29
Service spillway crest elevation 987.00 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
Data Source USGS:08088500
USGS Monitoring Location USGS:08088500

Lake Location