Lake Bonham: 78.6% full as of 2026-10-04
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 | 2026-10-04 | 78.6 | 562.64 | 8,683 | 8,671 | 11,027 | 943 |
| Yesterday | 2026-10-03 | 78.6 | 562.64 | 8,683 | 8,671 | 11,027 | 943 |
| 2 days ago | 2026-10-02 | 78.6 | 562.63 | 8,674 | 8,662 | 11,027 | 943 |
| 1 week ago | 2026-09-27 | 77.6 | 562.52 | 8,570 | 8,558 | 11,027 | 937 |
| 1 month ago | 2026-09-04 | 82.9 | 563.13 | 9,151 | 9,139 | 11,027 | 967 |
| 3 months ago | 2026-07-04 | 98.7 | 564.86 | 10,892 | 10,880 | 11,027 | 1,045 |
| 6 months ago | 2026-04-04 | 78.3 | 562.60 | 8,645 | 8,633 | 11,027 | 941 |
| 1 year ago | 2025-10-04 | 80.3 | 562.83 | 8,863 | 8,851 | 11,027 | 953 |
*
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 | 2026-10-04 14:00 | 562.64 | 565.00 | -2.36 |
| 1 hour prior | 2026-10-04 13:00 | 562.64 | 565.00 | -2.36 |
| 2 hours prior | 2026-10-04 12:00 | 562.65 | 565.00 | -2.35 |
| 6 hours prior | 2026-10-04 08:00 | 562.64 | 565.00 | -2.36 |
| 12 hours prior | 2026-10-04 02:00 | 562.64 | 565.00 | -2.36 |
| 24 hours prior | 2026-10-03 14:00 | 562.64 | 565.00 | -2.36 |
| 48 hours prior | 2026-10-02 14:00 | 562.63 | 565.00 | -2.37 |
*
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
