Lake Bob Sandlin: 87.6% full as of 2026-10-20
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 | 2026-10-20 | 87.6 | 334.72 | 179,193 | 168,462 | 192,417 | 8,349 |
| Yesterday | 2026-10-19 | 87.6 | 334.74 | 179,360 | 168,629 | 192,417 | 8,352 |
| 2 days ago | 2026-10-18 | 87.7 | 334.76 | 179,527 | 168,796 | 192,417 | 8,356 |
| 1 week ago | 2026-10-13 | 88.2 | 334.88 | 180,531 | 169,800 | 192,417 | 8,378 |
| 1 month ago | 2026-09-20 | 89.6 | 335.19 | 183,137 | 172,406 | 192,417 | 8,437 |
| 3 months ago | 2026-07-20 | 96.0 | 336.62 | 195,402 | 184,671 | 192,417 | 8,716 |
| 6 months ago | 2026-04-20 | 95.6 | 336.53 | 194,618 | 183,887 | 192,417 | 8,699 |
| 1 year ago | 2025-10-20 | 94.7 | 336.33 | 192,882 | 182,151 | 192,417 | 8,660 |
*
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 | 2026-10-20 17:00 | 334.70 | 337.50 | -2.80 |
| 1 hour prior | 2026-10-20 16:00 | 334.70 | 337.50 | -2.80 |
| 2 hours prior | 2026-10-20 15:00 | 334.70 | 337.50 | -2.80 |
| 6 hours prior | 2026-10-20 11:00 | 334.71 | 337.50 | -2.79 |
| 12 hours prior | 2026-10-20 05:00 | 334.72 | 337.50 | -2.78 |
| 24 hours prior | 2026-10-19 17:00 | 334.73 | 337.50 | -2.77 |
| 48 hours prior | 2026-10-18 17:00 | 334.75 | 337.50 | -2.75 |
*
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
