Pat Mayse Lake: 90.0% full as of 2026-10-13
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 | 2026-10-13 | 90.0 | 448.94 | 106,496 | 102,336 | 113,683 | 5,324 |
| Yesterday | 2026-10-12 | 90.3 | 449.01 | 106,869 | 102,709 | 113,683 | 5,334 |
| 2 days ago | 2026-10-11 | 90.3 | 449.00 | 106,815 | 102,655 | 113,683 | 5,333 |
| 1 week ago | 2026-10-06 | 90.9 | 449.12 | 107,456 | 103,296 | 113,683 | 5,350 |
| 1 month ago | 2026-09-13 | 93.2 | 449.60 | 110,056 | 105,896 | 113,683 | 5,489 |
| 3 months ago | 2026-07-13 | 100.0 | 452.20 | 124,687 | 113,683 | 113,683 | - n.a. - |
| 6 months ago | 2026-04-13 | 90.9 | 449.13 | 107,510 | 103,350 | 113,683 | 5,352 |
| 1 year ago | 2025-10-13 | 93.6 | 449.70 | 110,605 | 106,445 | 113,683 | 5,499 |
*
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 | 2026-10-13 16:00 | 448.98 | 451.00 | -2.02 |
| 1 hour prior | 2026-10-13 15:00 | 448.98 | 451.00 | -2.02 |
| 2 hours prior | 2026-10-13 14:00 | 448.98 | 451.00 | -2.02 |
| 6 hours prior | 2026-10-13 10:00 | 448.96 | 451.00 | -2.04 |
| 12 hours prior | 2026-10-13 04:00 | 448.89 | 451.00 | -2.11 |
| 24 hours prior | 2026-10-12 16:00 | 449.01 | 451.00 | -1.99 |
| 48 hours prior | 2026-10-11 16:00 | 449.02 | 451.00 | -1.98 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1967-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 415.00 ft above NGVD29 |
| Service spillway crest elevation | 451.00 ft above NGVD29 |
| Emergency spillway crest elevation | 477.00 ft above NGVD29 |
| Flood pool elevation | 460.50 ft above NGVD29 |
| Top of dam elevation | 488.50 ft above NGVD29 |
| Conservation pool elevation | 451.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USACE:MYST2 |
Lake Location
