Lake Bob Sandlin: 88.6% full as of 2026-10-09
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 | 2026-10-09 | 88.6 | 334.95 | 181,118 | 170,387 | 192,417 | 8,391 |
| Yesterday | 2026-10-08 | 88.6 | 334.96 | 181,202 | 170,471 | 192,417 | 8,392 |
| 2 days ago | 2026-10-07 | 88.6 | 334.96 | 181,202 | 170,471 | 192,417 | 8,392 |
| 1 week ago | 2026-10-02 | 88.5 | 334.94 | 181,034 | 170,303 | 192,417 | 8,389 |
| 1 month ago | 2026-09-09 | 90.7 | 335.43 | 185,168 | 174,437 | 192,417 | 8,484 |
| 3 months ago | 2026-07-09 | 96.4 | 336.71 | 196,187 | 185,456 | 192,417 | 8,734 |
| 6 months ago | 2026-04-09 | 95.3 | 336.47 | 194,096 | 183,365 | 192,417 | 8,687 |
| 1 year ago | 2025-10-09 | 95.4 | 336.50 | 194,357 | 183,626 | 192,417 | 8,693 |
*
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 | 2026-10-09 04:00 | 334.95 | 337.50 | -2.55 |
| 1 hour prior | 2026-10-09 03:00 | 334.95 | 337.50 | -2.55 |
| 2 hours prior | 2026-10-09 02:00 | 334.95 | 337.50 | -2.55 |
| 6 hours prior | 2026-10-08 22:00 | 334.95 | 337.50 | -2.55 |
| 12 hours prior | 2026-10-08 16:00 | 334.96 | 337.50 | -2.54 |
| 24 hours prior | 2026-10-08 04:00 | 334.96 | 337.50 | -2.54 |
| 48 hours prior | 2026-10-07 04:00 | 334.96 | 337.50 | -2.54 |
*
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
