Lake Bonham: 79.1% full as of 2026-09-22
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 | 2026-09-22 | 79.1 | 562.69 | 8,730 | 8,718 | 11,027 | 946 |
| Yesterday | 2026-09-21 | 79.3 | 562.72 | 8,759 | 8,747 | 11,027 | 947 |
| 2 days ago | 2026-09-20 | 79.0 | 562.68 | 8,721 | 8,709 | 11,027 | 945 |
| 1 week ago | 2026-09-15 | 80.3 | 562.83 | 8,863 | 8,851 | 11,027 | 953 |
| 1 month ago | 2026-08-22 | 86.6 | 563.55 | 9,561 | 9,549 | 11,027 | 986 |
| 3 months ago | 2026-06-22 | 100.0 | 565.40 | 11,471 | 11,027 | 11,027 | 1,091 |
| 6 months ago | 2026-03-22 | 76.8 | 562.43 | 8,486 | 8,474 | 11,027 | 931 |
| 1 year ago | 2025-09-22 | 82.4 | 563.08 | 9,103 | 9,091 | 11,027 | 965 |
*
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 | 2026-09-22 16:00 | 562.68 | 565.00 | -2.32 |
| 1 hour prior | 2026-09-22 15:00 | 562.68 | 565.00 | -2.32 |
| 2 hours prior | 2026-09-22 14:00 | 562.68 | 565.00 | -2.32 |
| 6 hours prior | 2026-09-22 10:00 | 562.69 | 565.00 | -2.31 |
| 12 hours prior | 2026-09-22 04:00 | 562.69 | 565.00 | -2.31 |
| 24 hours prior | 2026-09-21 16:00 | 562.72 | 565.00 | -2.28 |
| 48 hours prior | 2026-09-20 16:00 | 562.67 | 565.00 | -2.33 |
*
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
