Lake Bob Sandlin: 94.8% full as of 2022-12-09

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 2022-12-09 94.8 336.36 193,142 182,411 192,417 8,665
1 day prior 2022-12-08 94.7 336.34 192,969 182,238 192,417 8,662
2 days prior 2022-12-07 94.7 336.33 192,882 182,151 192,417 8,660
1 week prior 2022-12-02 94.6 336.32 192,796 182,065 192,417 8,658
1 month prior 2022-11-09 92.4 335.82 188,491 177,760 192,417 8,560
3 months prior 2022-09-09 94.9 336.38 193,315 182,584 192,417 8,669
6 months prior 2022-06-09 98.3 337.13 199,872 189,141 192,417 8,816
1 year prior 2021-12-09 92.3 335.80 188,320 177,589 192,417 8,556
*

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 2022-12-10 01:00 336.38 337.50 -1.12
1 hour prior 2022-12-10 00:00 336.37 337.50 -1.13
2 hours prior 2022-12-09 23:00 336.38 337.50 -1.12
6 hours prior 2022-12-09 19:00 336.37 337.50 -1.13
12 hours prior 2022-12-09 13:00 336.36 337.50 -1.14
24 hours prior 2022-12-09 01:00 336.35 337.50 -1.15
48 hours prior 2022-12-08 01:00 336.33 337.50 -1.17
*

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