Lake Bob Sandlin: 100.0% full as of 2024-07-20

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 2024-07-20 100.0 337.82 206,002 192,417 192,417 - n.a. -
Yesterday 2024-07-19 100.0 337.82 206,002 192,417 192,417 - n.a. -
2 days ago 2024-07-18 100.0 337.79 205,734 192,417 192,417 - n.a. -
1 week ago 2024-07-13 100.0 337.64 204,394 192,417 192,417 8,916
1 month ago 2024-06-20 100.0 337.71 205,019 192,417 192,417 8,929
3 months ago 2024-04-20 100.0 337.90 206,719 192,417 192,417 - n.a. -
6 months ago 2024-01-20 96.8 336.81 197,061 186,330 192,417 8,753
1 year ago 2023-07-20 99.9 337.47 202,881 192,150 192,417 8,883
*

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 2024-07-20 13:00 337.82 337.50 0.32
1 hour prior 2024-07-20 12:00 337.82 337.50 0.32
2 hours prior 2024-07-20 11:00 337.82 337.50 0.32
6 hours prior 2024-07-20 07:00 337.82 337.50 0.32
12 hours prior 2024-07-20 01:00 337.82 337.50 0.32
24 hours prior 2024-07-19 13:00 337.82 337.50 0.32
48 hours prior 2024-07-18 13:00 337.80 337.50 0.30
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1978-01-01
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
Data Source USGS:07344489

Lake Location