Lake Bob Sandlin: 93.8% full as of 2026-08-11
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 | 2026-08-11 | 93.8 | 336.13 | 191,154 | 180,423 | 192,417 | 8,620 |
| Yesterday | 2026-08-10 | 93.8 | 336.14 | 191,240 | 180,509 | 192,417 | 8,622 |
| 2 days ago | 2026-08-09 | 93.9 | 336.17 | 191,499 | 180,768 | 192,417 | 8,628 |
| 1 week ago | 2026-08-04 | 94.2 | 336.22 | 191,931 | 181,200 | 192,417 | 8,638 |
| 1 month ago | 2026-07-11 | 96.2 | 336.66 | 195,750 | 185,019 | 192,417 | 8,724 |
| 3 months ago | 2026-05-11 | 96.3 | 336.69 | 196,012 | 185,281 | 192,417 | 8,730 |
| 6 months ago | 2026-02-11 | 93.8 | 336.14 | 191,240 | 180,509 | 192,417 | 8,622 |
| 1 year ago | 2025-08-11 | 97.3 | 336.92 | 198,025 | 187,294 | 192,417 | 8,775 |
*
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 | 2026-08-11 17:00 | 336.11 | 337.50 | -1.39 |
| 1 hour prior | 2026-08-11 16:00 | 336.11 | 337.50 | -1.39 |
| 2 hours prior | 2026-08-11 15:00 | 336.12 | 337.50 | -1.38 |
| 6 hours prior | 2026-08-11 11:00 | 336.13 | 337.50 | -1.37 |
| 12 hours prior | 2026-08-11 05:00 | 336.13 | 337.50 | -1.37 |
| 24 hours prior | 2026-08-10 17:00 | 336.14 | 337.50 | -1.36 |
| 48 hours prior | 2026-08-09 17:00 | 336.16 | 337.50 | -1.34 |
*
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 |
| 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 |
| USGS Monitoring Location | USGS:07344489 |
Lake Location
