Moss Lake: 98.5% full as of 2026-11-13
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 | 2026-11-13 | 98.5 | 714.67 | 23,800 | 23,703 | 24,058 | 1,072 |
| Yesterday | 2026-11-12 | 98.6 | 714.68 | 23,810 | 23,713 | 24,058 | 1,072 |
| 2 days ago | 2026-11-11 | 98.6 | 714.69 | 23,821 | 23,724 | 24,058 | 1,072 |
| 1 week ago | 2026-11-06 | 98.9 | 714.75 | 23,885 | 23,788 | 24,058 | 1,074 |
| 1 month ago | 2026-10-13 | 99.0 | 714.78 | 23,918 | 23,821 | 24,058 | 1,075 |
| 3 months ago | 2026-08-13 | 94.2 | 713.69 | 22,761 | 22,664 | 24,058 | 1,048 |
| 6 months ago | 2026-05-13 | 91.6 | 713.09 | 22,136 | 22,039 | 24,058 | 1,033 |
| 1 year ago | 2025-11-13 | 90.3 | 712.78 | 21,817 | 21,720 | 24,058 | 1,026 |
*
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 | 2026-11-13 21:15 | 714.66 | 715.00 | -0.34 |
| 1 hour prior | 2026-11-13 20:15 | 714.66 | 715.00 | -0.34 |
| 2 hours prior | 2026-11-13 19:15 | 714.66 | 715.00 | -0.34 |
| 6 hours prior | 2026-11-13 15:15 | 714.67 | 715.00 | -0.33 |
| 12 hours prior | 2026-11-13 09:15 | 714.66 | 715.00 | -0.34 |
| 24 hours prior | 2026-11-12 21:15 | 714.68 | 715.00 | -0.32 |
| 48 hours prior | 2026-11-11 21:15 | 714.69 | 715.00 | -0.31 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1966-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 666.00 ft above NGVD29 |
| Service spillway crest elevation | 715.00 ft above NGVD29 |
| Emergency spillway crest elevation | 725.00 ft above NGVD29 |
| Top of dam elevation | 740.00 ft above NGVD29 |
| Conservation pool elevation | 715.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USGS:07315950 |
| USGS Monitoring Location | USGS:07315950 |
Lake Location
