Lake Bob Sandlin: 93.1% full as of 2023-10-01

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 2023-10-01 93.1 335.99 189,949 179,218 192,417 8,593
Yesterday 2023-09-30 93.2 336.00 190,035 179,304 192,417 8,595
2 days ago 2023-09-29 93.3 336.02 190,207 179,476 192,417 8,599
1 week ago 2023-09-24 93.5 336.08 190,723 179,992 192,417 8,611
1 month ago 2023-09-01 95.1 336.42 193,662 182,931 192,417 8,677
3 months ago 2023-07-01 99.2 337.32 201,551 190,820 192,417 8,853
6 months ago 2023-04-01 99.7 337.44 202,615 191,884 192,417 8,877
1 year ago 2022-10-01 92.7 335.90 189,177 178,446 192,417 8,575
*

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 2023-10-01 02:00 335.99 337.50 -1.51
1 hour prior 2023-10-01 01:00 335.99 337.50 -1.51
2 hours prior 2023-10-01 00:00 335.99 337.50 -1.51
6 hours prior 2023-09-30 20:00 335.99 337.50 -1.51
12 hours prior 2023-09-30 14:00 336.00 337.50 -1.50
24 hours prior 2023-09-30 02:00 336.01 337.50 -1.49
48 hours prior 2023-09-29 02:00 336.02 337.50 -1.48
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1978-01-01
Gauge USGS:07344489
Vertical datum NGVD29
Dead pool elevation 300.00 ft above NGVD29
Service spillway crest elevation 316.50 ft above NGVD29
Top of flood gate elevation 339.00 ft above NGVD29
Emergency spillway crest elevation 341.30 ft above NGVD29
Maximum design elevation 345.60 ft above NGVD29
Top of dam elevation 349.00 ft above NGVD29
Conservation pool elevation 337.50 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1978-01-01 (source: USGS)
2000-10-01 (source: USGS)
2008-11-01 (source: TWDB) : GIS Data
2018-02-01 (source: TWDB) : GIS Data

Lake Location