Lake Bonham: 80.8% full as of 2026-09-13
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 | 2026-09-13 | 80.8 | 562.89 | 8,921 | 8,909 | 11,027 | 956 |
| Yesterday | 2026-09-12 | 81.0 | 562.92 | 8,949 | 8,937 | 11,027 | 957 |
| 2 days ago | 2026-09-11 | 81.2 | 562.94 | 8,968 | 8,956 | 11,027 | 958 |
| 1 week ago | 2026-09-06 | 82.4 | 563.08 | 9,103 | 9,091 | 11,027 | 965 |
| 1 month ago | 2026-08-13 | 89.2 | 563.84 | 9,849 | 9,837 | 11,027 | 999 |
| 3 months ago | 2026-06-13 | 100.0 | 565.83 | 11,944 | 11,027 | 11,027 | 1,113 |
| 6 months ago | 2026-03-13 | 78.3 | 562.60 | 8,645 | 8,633 | 11,027 | 941 |
| 1 year ago | 2025-09-13 | 84.1 | 563.27 | 9,287 | 9,275 | 11,027 | 973 |
*
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 | 2026-09-13 22:00 | 562.87 | 565.00 | -2.13 |
| 1 hour prior | 2026-09-13 21:00 | 562.87 | 565.00 | -2.13 |
| 2 hours prior | 2026-09-13 20:00 | 562.88 | 565.00 | -2.12 |
| 6 hours prior | 2026-09-13 16:00 | 562.89 | 565.00 | -2.11 |
| 12 hours prior | 2026-09-13 10:00 | 562.89 | 565.00 | -2.11 |
| 24 hours prior | 2026-09-12 22:00 | 562.91 | 565.00 | -2.09 |
| 48 hours prior | 2026-09-11 22:00 | 562.93 | 565.00 | -2.07 |
*
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
