Joe Pool Lake: 96.2% full as of 2026-08-11
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 | 2026-08-11 | 96.2 | 521.13 | 145,281 | 143,911 | 149,629 | 6,444 |
| Yesterday | 2026-08-10 | 96.3 | 521.16 | 145,475 | 144,105 | 149,629 | 6,453 |
| 2 days ago | 2026-08-09 | 96.5 | 521.20 | 145,733 | 144,363 | 149,629 | 6,465 |
| 1 week ago | 2026-08-04 | 97.4 | 521.41 | 147,098 | 145,728 | 149,629 | 6,534 |
| 1 month ago | 2026-07-11 | 99.2 | 521.81 | 149,734 | 148,364 | 149,629 | 6,640 |
| 3 months ago | 2026-05-11 | 100.0 | 522.10 | 151,668 | 149,629 | 149,629 | 6,708 |
| 6 months ago | 2026-02-11 | 99.2 | 521.82 | 149,800 | 148,430 | 149,629 | 6,642 |
| 1 year ago | 2025-08-11 | 99.2 | 521.81 | 149,734 | 148,364 | 149,629 | 6,640 |
*
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 | 2026-08-11 17:00 | 521.11 | 522.00 | -0.89 |
| 1 hour prior | 2026-08-11 16:00 | 521.12 | 522.00 | -0.88 |
| 2 hours prior | 2026-08-11 15:00 | 521.11 | 522.00 | -0.89 |
| 6 hours prior | 2026-08-11 11:00 | 521.13 | 522.00 | -0.87 |
| 12 hours prior | 2026-08-11 05:00 | 521.13 | 522.00 | -0.87 |
| 24 hours prior | 2026-08-10 17:00 | 521.15 | 522.00 | -0.85 |
| 48 hours prior | 2026-08-09 17:00 | 521.19 | 522.00 | -0.81 |
*
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
