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: 83.6% full as of 2021-09-25

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 2021-09-25 83.6 2,113.24 10,255 10,255 12,267 567
Yesterday 2021-09-24 83.7 2,113.26 10,266 10,266 12,267 568
2 days ago 2021-09-23 83.8 2,113.29 10,283 10,283 12,267 569
1 week ago 2021-09-18 84.5 2,113.44 10,369 10,369 12,267 572
1 month ago 2021-08-25 86.8 2,113.92 10,647 10,647 12,267 584
3 months ago 2021-06-25 82.5 2,113.00 10,121 10,121 12,267 562
6 months ago 2021-03-25 81.3 2,112.71 9,969 9,969 12,267 554
1 year ago 2020-09-25 86.8 2,113.93 10,653 10,653 12,267 584
*

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 2021-09-25 05:45 2,113.24 2,116.50 -3.26 below flood pool
1 hour prior 2021-09-25 04:45 2,113.24 2,116.50 -3.26 below flood pool
2 hours prior 2021-09-25 03:45 2,113.25 2,116.50 -3.25 below flood pool
6 hours prior 2021-09-24 23:45 2,113.24 2,116.50 -3.26 below flood pool
12 hours prior 2021-09-24 17:45 2,113.26 2,116.50 -3.24 below flood pool
24 hours prior 2021-09-24 05:45 2,113.27 2,116.50 -3.23 below flood pool
48 hours prior 2021-09-23 05:45 2,113.30 2,116.50 -3.20 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