Lake Sweetwater: 17.3% full as of 2026-09-13

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 2026-09-13 17.3 2,090.89 2,127 2,127 12,267 208
Yesterday 2026-09-12 17.4 2,090.92 2,133 2,133 12,267 208
2 days ago 2026-09-11 17.4 2,090.94 2,138 2,138 12,267 208
1 week ago 2026-09-06 17.6 2,091.01 2,153 2,153 12,267 209
1 month ago 2026-08-13 18.7 2,091.69 2,293 2,293 12,267 218
3 months ago 2026-06-13 21.8 2,093.41 2,672 2,672 12,267 237
6 months ago 2026-03-13 24.0 2,094.57 2,950 2,950 12,267 251
1 year ago 2025-09-13 28.1 2,096.52 3,448 3,448 12,267 276
*

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 2026-09-13 22:45 2,090.86 2,116.50 -25.64
1 hour prior 2026-09-13 21:45 2,090.88 2,116.50 -25.62
2 hours prior 2026-09-13 20:45 2,090.87 2,116.50 -25.63
6 hours prior 2026-09-13 16:45 2,090.89 2,116.50 -25.61
12 hours prior 2026-09-13 10:45 2,090.89 2,116.50 -25.61
24 hours prior 2026-09-12 22:45 2,090.91 2,116.50 -25.59
48 hours prior 2026-09-11 22:45 2,090.94 2,116.50 -25.56
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1930-01-01
Vertical datum NGVD29
Service spillway crest elevation 2,116.50 ft above NGVD29
Top of dam elevation 2,128.50 ft above NGVD29
Conservation pool elevation 2,116.50 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: TWDB)
Data Source USGS:08083200
USGS Monitoring Location USGS:08083200

Lake Location