Lake Bonham: 73.8% full as of 2026-11-12
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 | 2026-11-12 | 73.8 | 562.07 | 8,155 | 8,143 | 11,027 | 906 |
| Yesterday | 2026-11-11 | 74.0 | 562.09 | 8,173 | 8,161 | 11,027 | 908 |
| 2 days ago | 2026-11-10 | 74.2 | 562.11 | 8,192 | 8,180 | 11,027 | 909 |
| 1 week ago | 2026-11-05 | 74.8 | 562.19 | 8,265 | 8,253 | 11,027 | 915 |
| 1 month ago | 2026-10-12 | 77.4 | 562.49 | 8,542 | 8,530 | 11,027 | 935 |
| 3 months ago | 2026-08-12 | 89.5 | 563.87 | 9,879 | 9,867 | 11,027 | 1,000 |
| 6 months ago | 2026-05-12 | 79.4 | 562.73 | 8,768 | 8,756 | 11,027 | 948 |
| 1 year ago | 2025-11-12 | 73.8 | 562.06 | 8,146 | 8,134 | 11,027 | 905 |
*
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 | 2026-11-12 07:00 | 562.07 | 565.00 | -2.93 |
| 1 hour prior | 2026-11-12 06:00 | 562.07 | 565.00 | -2.93 |
| 2 hours prior | 2026-11-12 05:00 | 562.07 | 565.00 | -2.93 |
| 6 hours prior | 2026-11-12 01:00 | 562.07 | 565.00 | -2.93 |
| 12 hours prior | 2026-11-11 19:00 | 562.09 | 565.00 | -2.91 |
| 24 hours prior | 2026-11-11 07:00 | 562.09 | 565.00 | -2.91 |
| 48 hours prior | 2026-11-10 07:00 | 562.11 | 565.00 | -2.89 |
*
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
