Joe Pool Lake: 91.6% full as of 2026-09-11
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 | 2026-09-11 | 91.6 | 520.05 | 138,471 | 137,101 | 149,629 | 6,182 |
| Yesterday | 2026-09-10 | 91.7 | 520.07 | 138,594 | 137,224 | 149,629 | 6,186 |
| 2 days ago | 2026-09-09 | 91.8 | 520.10 | 138,780 | 137,410 | 149,629 | 6,193 |
| 1 week ago | 2026-09-04 | 92.5 | 520.26 | 139,774 | 138,404 | 149,629 | 6,228 |
| 1 month ago | 2026-08-11 | 96.1 | 521.12 | 145,217 | 143,847 | 149,629 | 6,441 |
| 3 months ago | 2026-06-11 | 100.0 | 524.39 | 167,614 | 149,629 | 149,629 | 7,213 |
| 6 months ago | 2026-03-11 | 100.0 | 523.57 | 161,774 | 149,629 | 149,629 | 7,032 |
| 1 year ago | 2025-09-11 | 96.5 | 521.20 | 145,733 | 144,363 | 149,629 | 6,465 |
*
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 | 2026-09-11 22:00 | 520.05 | 522.00 | -1.95 |
| 1 hour prior | 2026-09-11 21:00 | 520.06 | 522.00 | -1.94 |
| 2 hours prior | 2026-09-11 20:00 | 520.06 | 522.00 | -1.94 |
| 6 hours prior | 2026-09-11 16:00 | 520.03 | 522.00 | -1.97 |
| 12 hours prior | 2026-09-11 10:00 | 520.05 | 522.00 | -1.95 |
| 24 hours prior | 2026-09-10 22:00 | 520.05 | 522.00 | -1.95 |
| 48 hours prior | 2026-09-09 22:00 | 520.09 | 522.00 | -1.91 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1986-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 466.00 ft above NGVD29 |
| Emergency spillway crest elevation | 541.00 ft above NGVD29 |
| Flood pool elevation | 536.00 ft above NGVD29 |
| Maximum design elevation | 559.50 ft above NGVD29 |
| Top of dam elevation | 564.50 ft above NGVD29 |
| Conservation pool elevation | 522.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USGS:08049800 |
| USGS Monitoring Location | USGS:08049800 |
Lake Location
