Moss Lake: 98.2% full as of 2026-10-24
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 | 2026-10-24 | 98.2 | 714.59 | 23,714 | 23,617 | 24,058 | 1,070 |
| Yesterday | 2026-10-23 | 98.2 | 714.60 | 23,725 | 23,628 | 24,058 | 1,070 |
| 2 days ago | 2026-10-22 | 98.3 | 714.62 | 23,746 | 23,649 | 24,058 | 1,071 |
| 1 week ago | 2026-10-17 | 98.7 | 714.70 | 23,832 | 23,735 | 24,058 | 1,073 |
| 1 month ago | 2026-09-24 | 89.6 | 712.63 | 21,664 | 21,567 | 24,058 | 1,022 |
| 3 months ago | 2026-07-24 | 96.9 | 714.30 | 23,405 | 23,308 | 24,058 | 1,063 |
| 6 months ago | 2026-04-24 | 91.0 | 712.95 | 21,992 | 21,895 | 24,058 | 1,030 |
| 1 year ago | 2025-10-24 | 90.9 | 712.92 | 21,961 | 21,864 | 24,058 | 1,029 |
*
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 | 2026-10-24 19:15 | 714.58 | 715.00 | -0.42 |
| 1 hour prior | 2026-10-24 18:15 | 714.59 | 715.00 | -0.41 |
| 2 hours prior | 2026-10-24 17:15 | 714.59 | 715.00 | -0.41 |
| 6 hours prior | 2026-10-24 13:15 | 714.59 | 715.00 | -0.41 |
| 12 hours prior | 2026-10-24 07:15 | 714.59 | 715.00 | -0.41 |
| 24 hours prior | 2026-10-23 19:15 | 714.60 | 715.00 | -0.40 |
| 48 hours prior | 2026-10-22 19:15 | 714.61 | 715.00 | -0.39 |
*
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
