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: 88.0% full as of 2020-08-14

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)
Most recent 2020-08-14 88.0 2,114.17 10,794 10,794 12,267 590
1 day prior 2020-08-13 88.2 2,114.21 10,818 10,818 12,267 591
2 days prior 2020-08-12 88.3 2,114.24 10,836 10,836 12,267 592
1 week prior 2020-08-07 89.1 2,114.41 10,936 10,936 12,267 596
1 month prior 2020-07-14 92.2 2,115.02 11,311 11,311 12,267 610
3 months prior 2020-05-14 98.7 2,116.26 12,107 12,107 12,267 640
6 months prior 2020-02-14 100.0 2,116.50 12,267 12,267 12,267 647
1 year prior 2019-08-14 99.2 2,116.36 12,173 12,173 12,267 643
*

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 2020-08-15 01:45 2,114.15 2,116.50 -2.35 below flood pool
1 hour prior 2020-08-15 00:45 2,114.15 2,116.50 -2.35 below flood pool
2 hours prior 2020-08-14 23:45 2,114.14 2,116.50 -2.36 below flood pool
6 hours prior 2020-08-14 19:45 2,114.16 2,116.50 -2.34 below flood pool
12 hours prior 2020-08-14 13:45 2,114.18 2,116.50 -2.32 below flood pool
24 hours prior 2020-08-14 01:45 2,114.18 2,116.50 -2.32 below flood pool
48 hours prior 2020-08-13 01:45 2,114.22 2,116.50 -2.28 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