Moss Lake: 100.0% full as of 2026-10-07
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 | 2026-10-07 | 100.0 | 715.06 | 24,219 | 24,058 | 24,058 | - n.a. - |
| Yesterday | 2026-10-06 | 100.0 | 715.13 | 24,295 | 24,058 | 24,058 | - n.a. - |
| 2 days ago | 2026-10-05 | 100.0 | 715.30 | 24,480 | 24,058 | 24,058 | - n.a. - |
| 1 week ago | 2026-09-30 | 89.4 | 712.57 | 21,603 | 21,506 | 24,058 | 1,020 |
| 1 month ago | 2026-09-07 | 91.3 | 713.02 | 22,064 | 21,967 | 24,058 | 1,031 |
| 3 months ago | 2026-07-07 | 98.1 | 714.57 | 23,692 | 23,595 | 24,058 | 1,070 |
| 6 months ago | 2026-04-07 | 90.8 | 712.90 | 21,941 | 21,844 | 24,058 | 1,028 |
| 1 year ago | 2025-10-07 | 92.0 | 713.19 | 22,240 | 22,143 | 24,058 | 1,036 |
*
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 | 2026-10-07 04:15 | 715.05 | 715.00 | 0.05 |
| 1 hour prior | 2026-10-07 03:15 | 715.06 | 715.00 | 0.06 |
| 2 hours prior | 2026-10-07 02:15 | 715.06 | 715.00 | 0.06 |
| 6 hours prior | 2026-10-06 22:15 | 715.08 | 715.00 | 0.08 |
| 12 hours prior | 2026-10-06 16:15 | 715.11 | 715.00 | 0.11 |
| 24 hours prior | 2026-10-06 04:15 | 715.17 | 715.00 | 0.17 |
| 48 hours prior | 2026-10-05 04:15 | 715.37 | 715.00 | 0.37 |
*
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
