Lake Mineral Wells: 85.5% full as of 2026-09-19

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 2026-09-19 85.5 861.29 4,506 4,506 5,273 433
1 day prior 2026-09-18 85.7 861.32 4,520 4,520 5,273 434
2 days prior 2026-09-17 86.0 861.35 4,533 4,533 5,273 434
1 week prior 2026-09-12 86.9 861.46 4,580 4,580 5,273 436
1 month prior 2026-08-19 91.0 861.95 4,796 4,796 5,273 443
3 months prior 2026-06-19 100.0 863.50 5,509 5,273 5,273 480
6 months prior 2026-03-19 95.1 862.44 5,015 5,015 5,273 453
1 year prior 2025-09-19 89.7 861.80 4,729 4,729 5,273 441
*

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 2026-09-19 23:30 861.28 863.00 -1.72
1 hour prior 2026-09-19 22:30 861.29 863.00 -1.71
2 hours prior 2026-09-19 21:30 861.28 863.00 -1.72
6 hours prior 2026-09-19 17:30 861.28 863.00 -1.72
12 hours prior 2026-09-19 11:30 861.30 863.00 -1.70
24 hours prior 2026-09-18 23:30 861.31 863.00 -1.69
48 hours prior 2026-09-17 23:30 861.34 863.00 -1.66
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1920-01-01
Vertical datum NGVD29
Emergency spillway crest elevation 863.40 ft above NGVD29
Top of dam elevation 873.90 ft above NGVD29
Conservation pool elevation 863.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: TWDB)
2015-10-01 (source: TWDB) : GIS Data
Data Source USGS:08090700
USGS Monitoring Location USGS:08090700

Lake Location