Moss Lake: 95.6% full as of 2026-08-03
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 | 2026-08-03 | 95.6 | 714.02 | 23,108 | 23,011 | 24,058 | 1,056 |
| Yesterday | 2026-08-02 | 95.7 | 714.04 | 23,129 | 23,032 | 24,058 | 1,056 |
| 2 days ago | 2026-08-01 | 95.9 | 714.08 | 23,171 | 23,074 | 24,058 | 1,057 |
| 1 week ago | 2026-07-27 | 96.6 | 714.23 | 23,330 | 23,233 | 24,058 | 1,061 |
| 1 month ago | 2026-07-03 | 98.4 | 714.64 | 23,767 | 23,670 | 24,058 | 1,071 |
| 3 months ago | 2026-05-03 | 91.0 | 712.95 | 21,992 | 21,895 | 24,058 | 1,030 |
| 6 months ago | 2026-02-03 | 88.7 | 712.40 | 21,429 | 21,332 | 24,058 | 1,016 |
| 1 year ago | 2025-08-03 | 96.7 | 714.27 | 23,373 | 23,276 | 24,058 | 1,062 |
*
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 | 2026-08-03 15:15 | 714.02 | 715.00 | -0.98 |
| 1 hour prior | 2026-08-03 14:15 | 714.02 | 715.00 | -0.98 |
| 2 hours prior | 2026-08-03 13:15 | 714.02 | 715.00 | -0.98 |
| 6 hours prior | 2026-08-03 09:15 | 714.02 | 715.00 | -0.98 |
| 12 hours prior | 2026-08-03 03:15 | 714.03 | 715.00 | -0.97 |
| 24 hours prior | 2026-08-02 15:15 | 714.04 | 715.00 | -0.96 |
| 48 hours prior | 2026-08-01 15:15 | 714.06 | 715.00 | -0.94 |
*
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
