Moss Lake: 100.0% full as of 2026-10-04
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 | 2026-10-04 | 100.0 | 715.59 | 24,796 | 24,058 | 24,058 | - n.a. - |
| Yesterday | 2026-10-03 | 100.0 | 715.43 | 24,621 | 24,058 | 24,058 | - n.a. - |
| 2 days ago | 2026-10-02 | 100.0 | 715.62 | 24,829 | 24,058 | 24,058 | - n.a. - |
| 1 week ago | 2026-09-27 | 89.3 | 712.56 | 21,592 | 21,495 | 24,058 | 1,020 |
| 1 month ago | 2026-09-04 | 91.6 | 713.08 | 22,126 | 22,029 | 24,058 | 1,033 |
| 3 months ago | 2026-07-04 | 98.3 | 714.62 | 23,746 | 23,649 | 24,058 | 1,071 |
| 6 months ago | 2026-04-04 | 90.4 | 712.81 | 21,848 | 21,751 | 24,058 | 1,026 |
| 1 year ago | 2025-10-04 | 92.3 | 713.25 | 22,302 | 22,205 | 24,058 | 1,037 |
*
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 | 2026-10-04 16:15 | 715.50 | 715.00 | 0.50 |
| 1 hour prior | 2026-10-04 15:15 | 715.51 | 715.00 | 0.51 |
| 2 hours prior | 2026-10-04 14:15 | 715.52 | 715.00 | 0.52 |
| 6 hours prior | 2026-10-04 10:15 | 715.56 | 715.00 | 0.56 |
| 12 hours prior | 2026-10-04 04:15 | 715.60 | 715.00 | 0.60 |
| 24 hours prior | 2026-10-03 16:15 | 715.42 | 715.00 | 0.42 |
| 48 hours prior | 2026-10-02 16:15 | 715.53 | 715.00 | 0.53 |
*
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
