Pat Mayse Lake: 88.6% full as of 2026-11-04
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 | 2026-11-04 | 88.6 | 448.64 | 104,905 | 100,745 | 113,683 | 5,284 |
| Yesterday | 2026-11-03 | 88.7 | 448.66 | 105,010 | 100,850 | 113,683 | 5,287 |
| 2 days ago | 2026-11-02 | 88.2 | 448.56 | 104,482 | 100,322 | 113,683 | 5,274 |
| 1 week ago | 2026-10-28 | 88.4 | 448.59 | 104,640 | 100,480 | 113,683 | 5,278 |
| 1 month ago | 2026-10-04 | 91.1 | 449.18 | 107,778 | 103,618 | 113,683 | 5,359 |
| 3 months ago | 2026-08-04 | 99.8 | 450.95 | 117,562 | 113,402 | 113,683 | 5,633 |
| 6 months ago | 2026-05-04 | 91.1 | 449.17 | 107,724 | 103,564 | 113,683 | 5,358 |
| 1 year ago | 2025-11-04 | 90.1 | 448.96 | 106,602 | 102,442 | 113,683 | 5,327 |
*
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 | 2026-11-04 11:00 | 448.63 | 451.00 | -2.37 |
| 1 hour prior | 2026-11-04 10:00 | 448.64 | 451.00 | -2.36 |
| 2 hours prior | 2026-11-04 09:00 | 448.64 | 451.00 | -2.36 |
| 6 hours prior | 2026-11-04 05:00 | 448.64 | 451.00 | -2.36 |
| 12 hours prior | 2026-11-03 23:00 | 448.64 | 451.00 | -2.36 |
| 24 hours prior | 2026-11-03 11:00 | 448.69 | 451.00 | -2.31 |
| 48 hours prior | 2026-11-02 11:00 | 448.55 | 451.00 | -2.45 |
*
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
