Lake Sweetwater: 16.7% full as of 2026-09-27

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 2026-09-27 16.7 2,090.54 2,053 2,053 12,267 204
Yesterday 2026-09-26 16.8 2,090.56 2,056 2,056 12,267 205
2 days ago 2026-09-25 16.8 2,090.58 2,060 2,060 12,267 205
1 week ago 2026-09-20 17.0 2,090.68 2,081 2,081 12,267 206
1 month ago 2026-08-27 17.9 2,091.22 2,195 2,195 12,267 212
3 months ago 2026-06-27 21.0 2,093.00 2,578 2,578 12,267 232
6 months ago 2026-03-27 23.5 2,094.29 2,884 2,884 12,267 248
1 year ago 2025-09-27 27.5 2,096.25 3,377 3,377 12,267 272
*

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 2026-09-27 18:45 2,090.53 2,116.50 -25.97
1 hour prior 2026-09-27 17:45 2,090.54 2,116.50 -25.96
2 hours prior 2026-09-27 16:45 2,090.55 2,116.50 -25.95
6 hours prior 2026-09-27 12:45 2,090.55 2,116.50 -25.95
12 hours prior 2026-09-27 06:45 2,090.54 2,116.50 -25.96
24 hours prior 2026-09-26 18:45 2,090.54 2,116.50 -25.96
48 hours prior 2026-09-25 18:45 2,090.57 2,116.50 -25.93
*

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