Lake Bonham: 74.5% full as of 2026-11-07
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 | 2026-11-07 | 74.5 | 562.15 | 8,228 | 8,216 | 11,027 | 912 |
| Yesterday | 2026-11-06 | 74.8 | 562.18 | 8,256 | 8,244 | 11,027 | 915 |
| 2 days ago | 2026-11-05 | 74.8 | 562.19 | 8,265 | 8,253 | 11,027 | 915 |
| 1 week ago | 2026-10-31 | 74.3 | 562.12 | 8,201 | 8,189 | 11,027 | 910 |
| 1 month ago | 2026-10-07 | 78.1 | 562.58 | 8,627 | 8,615 | 11,027 | 940 |
| 3 months ago | 2026-08-07 | 91.0 | 564.04 | 10,050 | 10,038 | 11,027 | 1,008 |
| 6 months ago | 2026-05-07 | 78.6 | 562.64 | 8,683 | 8,671 | 11,027 | 943 |
| 1 year ago | 2025-11-07 | 74.9 | 562.20 | 8,274 | 8,262 | 11,027 | 916 |
*
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 | 2026-11-07 10:00 | 562.14 | 565.00 | -2.86 |
| 1 hour prior | 2026-11-07 09:00 | 562.14 | 565.00 | -2.86 |
| 2 hours prior | 2026-11-07 08:00 | 562.14 | 565.00 | -2.86 |
| 6 hours prior | 2026-11-07 04:00 | 562.14 | 565.00 | -2.86 |
| 12 hours prior | 2026-11-06 22:00 | 562.14 | 565.00 | -2.86 |
| 24 hours prior | 2026-11-06 10:00 | 562.18 | 565.00 | -2.82 |
| 48 hours prior | 2026-11-05 10:00 | 562.20 | 565.00 | -2.80 |
*
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
