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: 97.6% full as of 2019-09-19

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 2019-09-19 97.6 2,116.06 11,977 11,977 12,267 636
1 day prior 2019-09-18 97.7 2,116.07 11,984 11,984 12,267 636
2 days prior 2019-09-17 97.8 2,116.09 11,997 11,997 12,267 637
1 week prior 2019-09-12 97.7 2,116.08 11,990 11,990 12,267 636
1 month prior 2019-08-19 98.7 2,116.26 12,107 12,107 12,267 640
3 months prior 2019-06-19 100.0 2,116.65 12,367 12,267 12,267 650
6 months prior 2019-03-19 100.0 2,116.70 12,399 12,267 12,267 651
1 year prior 2018-09-19 16.8 2,090.57 2,058 2,058 12,267 205
*

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 2019-09-20 03:45 2,116.04 2,116.50 -0.46 below flood pool
1 hour prior 2019-09-20 02:45 2,116.04 2,116.50 -0.46 below flood pool
2 hours prior 2019-09-20 01:45 2,116.04 2,116.50 -0.46 below flood pool
6 hours prior 2019-09-19 21:45 2,116.05 2,116.50 -0.45 below flood pool
12 hours prior 2019-09-19 15:45 2,116.07 2,116.50 -0.43 below flood pool
24 hours prior 2019-09-19 03:45 2,116.06 2,116.50 -0.44 below flood pool
48 hours prior 2019-09-18 03:45 2,116.08 2,116.50 -0.42 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