Lake Bonham: 85.4% full as of 2026-08-24
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 | 2026-08-24 | 85.4 | 563.42 | 9,434 | 9,422 | 11,027 | 980 |
| Yesterday | 2026-08-23 | 85.7 | 563.45 | 9,463 | 9,451 | 11,027 | 981 |
| 2 days ago | 2026-08-22 | 86.0 | 563.48 | 9,493 | 9,481 | 11,027 | 983 |
| 1 week ago | 2026-08-17 | 87.5 | 563.65 | 9,660 | 9,648 | 11,027 | 990 |
| 1 month ago | 2026-07-24 | 94.9 | 564.46 | 10,477 | 10,465 | 11,027 | 1,027 |
| 3 months ago | 2026-05-24 | 82.0 | 563.03 | 9,055 | 9,043 | 11,027 | 962 |
| 6 months ago | 2026-02-24 | 77.8 | 562.54 | 8,589 | 8,577 | 11,027 | 938 |
| 1 year ago | 2025-08-24 | 86.2 | 563.50 | 9,512 | 9,500 | 11,027 | 984 |
*
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 | 2026-08-24 15:00 | 563.41 | 565.00 | -1.59 |
| 1 hour prior | 2026-08-24 14:00 | 563.41 | 565.00 | -1.59 |
| 2 hours prior | 2026-08-24 13:00 | 563.41 | 565.00 | -1.59 |
| 6 hours prior | 2026-08-24 09:00 | 563.42 | 565.00 | -1.58 |
| 12 hours prior | 2026-08-24 03:00 | 563.43 | 565.00 | -1.57 |
| 24 hours prior | 2026-08-23 15:00 | 563.45 | 565.00 | -1.55 |
| 48 hours prior | 2026-08-22 15:00 | 563.48 | 565.00 | -1.52 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1969-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 538.00 ft above NGVD29 |
| Service spillway crest elevation | 565.00 ft above NGVD29 |
| Emergency spillway crest elevation | 571.00 ft above NGVD29 |
| Top of dam elevation | 584.00 ft above NGVD29 |
| Conservation pool elevation | 565.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USGS:07332610 |
| USGS Monitoring Location | USGS:07332610 |
Lake Location
