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: 20.5% full as of 2017-09-21

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 2017-09-21 20.5 2,092.73 2,519 2,519 12,267 229
Yesterday 2017-09-20 20.6 2,092.75 2,523 2,523 12,267 230
2 days ago 2017-09-19 20.6 2,092.79 2,532 2,532 12,267 230
1 week ago 2017-09-14 20.8 2,092.89 2,554 2,554 12,267 231
1 month ago 2017-08-21 21.8 2,093.40 2,670 2,670 12,267 237
3 months ago 2017-06-21 23.8 2,094.44 2,920 2,920 12,267 249
6 months ago 2017-03-21 23.5 2,094.30 2,887 2,887 12,267 248
1 year ago 2016-09-21 21.2 2,093.10 2,600 2,600 12,267 233
*

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 2017-09-21 15:45 2,092.73 2,116.5 -23.8 below flood pool
1 hour prior 2017-09-21 14:45 2,092.74 2,116.5 -23.8 below flood pool
2 hours prior 2017-09-21 13:45 2,092.75 2,116.5 -23.8 below flood pool
6 hours prior 2017-09-21 09:45 2,092.75 2,116.5 -23.8 below flood pool
12 hours prior 2017-09-21 03:45 2,092.73 2,116.5 -23.8 below flood pool
24 hours prior 2017-09-20 15:45 2,092.75 2,116.5 -23.8 below flood pool
48 hours prior 2017-09-19 15:45 2,092.80 2,116.5 -23.7 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 2,116.5 ft above NGVD29
Top of dam elevation 2,128.5 ft above NGVD29
Conservation pool elevation 2,116.5 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