Lake Bonham: 88.1% full as of 2026-08-15
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 | 2026-08-15 | 88.1 | 563.72 | 9,730 | 9,718 | 11,027 | 994 |
| Yesterday | 2026-08-14 | 88.4 | 563.75 | 9,760 | 9,748 | 11,027 | 995 |
| 2 days ago | 2026-08-13 | 88.7 | 563.78 | 9,789 | 9,777 | 11,027 | 996 |
| 1 week ago | 2026-08-08 | 90.3 | 563.96 | 9,969 | 9,957 | 11,027 | 1,004 |
| 1 month ago | 2026-07-15 | 97.2 | 564.71 | 10,735 | 10,723 | 11,027 | 1,038 |
| 3 months ago | 2026-05-15 | 79.0 | 562.68 | 8,721 | 8,709 | 11,027 | 945 |
| 6 months ago | 2026-02-15 | 77.4 | 562.50 | 8,552 | 8,540 | 11,027 | 935 |
| 1 year ago | 2025-08-15 | 88.5 | 563.76 | 9,769 | 9,757 | 11,027 | 995 |
*
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 | 2026-08-15 20:00 | 563.70 | 565.00 | -1.30 |
| 1 hour prior | 2026-08-15 19:00 | 563.70 | 565.00 | -1.30 |
| 2 hours prior | 2026-08-15 18:00 | 563.70 | 565.00 | -1.30 |
| 6 hours prior | 2026-08-15 14:00 | 563.72 | 565.00 | -1.28 |
| 12 hours prior | 2026-08-15 08:00 | 563.72 | 565.00 | -1.28 |
| 24 hours prior | 2026-08-14 20:00 | 563.74 | 565.00 | -1.26 |
| 48 hours prior | 2026-08-13 20:00 | 563.77 | 565.00 | -1.23 |
*
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
