Recent changes

2013-02-12: The rating curve for this reservoir has been updated and replaced with data from the Texas Water Development Board's Report 126.

Lake Sweetwater: 88.5% full as of 2020-08-11

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, and (2) 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.

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 2020-08-11 88.5 2,114.28 10,859 10,859 12,267 593
Yesterday 2020-08-10 88.7 2,114.31 10,877 10,877 12,267 593
2 days ago 2020-08-09 88.8 2,114.34 10,895 10,895 12,267 594
1 week ago 2020-08-04 89.6 2,114.50 10,990 10,990 12,267 598
1 month ago 2020-07-11 92.8 2,115.14 11,385 11,385 12,267 613
3 months ago 2020-05-11 98.9 2,116.30 12,133 12,133 12,267 641
6 months ago 2020-02-11 99.7 2,116.45 12,233 12,233 12,267 646
1 year ago 2019-08-11 99.5 2,116.41 12,207 12,207 12,267 644
*

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 2020-08-11 11:45 2,114.27 2,116.50 -2.23 below flood pool
1 hour prior 2020-08-11 10:45 2,114.29 2,116.50 -2.21 below flood pool
2 hours prior 2020-08-11 09:45 2,114.28 2,116.50 -2.22 below flood pool
6 hours prior 2020-08-11 05:45 2,114.27 2,116.50 -2.23 below flood pool
12 hours prior 2020-08-10 23:45 2,114.29 2,116.50 -2.21 below flood pool
24 hours prior 2020-08-10 11:45 2,114.32 2,116.50 -2.18 below flood pool
48 hours prior 2020-08-09 11:45 2,114.35 2,116.50 -2.15 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1930-01-01
Vertical datum NGVD29
Gauge USGS:08083200
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)

Lake Location