Moss Lake: 90.6% full as of 2026-09-14
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 | 2026-09-14 | 90.6 | 712.86 | 21,900 | 21,803 | 24,058 | 1,028 |
| Yesterday | 2026-09-13 | 90.7 | 712.88 | 21,920 | 21,823 | 24,058 | 1,028 |
| 2 days ago | 2026-09-12 | 90.8 | 712.91 | 21,951 | 21,854 | 24,058 | 1,029 |
| 1 week ago | 2026-09-07 | 91.3 | 713.02 | 22,064 | 21,967 | 24,058 | 1,031 |
| 1 month ago | 2026-08-14 | 94.1 | 713.67 | 22,740 | 22,643 | 24,058 | 1,047 |
| 3 months ago | 2026-06-14 | 94.6 | 713.77 | 22,845 | 22,748 | 24,058 | 1,050 |
| 6 months ago | 2026-03-14 | 90.2 | 712.77 | 21,807 | 21,710 | 24,058 | 1,025 |
| 1 year ago | 2025-09-14 | 93.9 | 713.61 | 22,677 | 22,580 | 24,058 | 1,046 |
*
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 | 2026-09-14 13:15 | 712.87 | 715.00 | -2.13 |
| 1 hour prior | 2026-09-14 12:15 | 712.86 | 715.00 | -2.14 |
| 2 hours prior | 2026-09-14 11:15 | 712.86 | 715.00 | -2.14 |
| 6 hours prior | 2026-09-14 07:15 | 712.86 | 715.00 | -2.14 |
| 12 hours prior | 2026-09-14 01:15 | 712.87 | 715.00 | -2.13 |
| 24 hours prior | 2026-09-13 13:15 | 712.89 | 715.00 | -2.11 |
| 48 hours prior | 2026-09-12 13:15 | 712.91 | 715.00 | -2.09 |
*
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
