Moss Lake: 97.9% full as of 2026-10-28
Historical Data
| Date | Percent Full |
Mean Water Level (ft) |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
Surface Area (acres) |
|
|---|---|---|---|---|---|---|---|
| Most recent | 2026-10-28 | 97.9 | 714.54 | 23,660 | 23,563 | 24,058 | 1,069 |
| 1 day prior | 2026-10-27 | 98.0 | 714.55 | 23,671 | 23,574 | 24,058 | 1,069 |
| 2 days prior | 2026-10-26 | 98.0 | 714.56 | 23,682 | 23,585 | 24,058 | 1,069 |
| 1 week prior | 2026-10-21 | 98.3 | 714.63 | 23,757 | 23,660 | 24,058 | 1,071 |
| 1 month prior | 2026-09-28 | 89.6 | 712.62 | 21,654 | 21,557 | 24,058 | 1,022 |
| 3 months prior | 2026-07-28 | 96.4 | 714.19 | 23,288 | 23,191 | 24,058 | 1,060 |
| 6 months prior | 2026-04-28 | 91.2 | 713.00 | 22,044 | 21,947 | 24,058 | 1,031 |
| 1 year prior | 2025-10-28 | 91.6 | 713.08 | 22,126 | 22,029 | 24,058 | 1,033 |
*
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 | 2026-10-28 23:15 | 714.53 | 715.00 | -0.47 |
| 1 hour prior | 2026-10-28 22:15 | 714.53 | 715.00 | -0.47 |
| 2 hours prior | 2026-10-28 21:15 | 714.54 | 715.00 | -0.46 |
| 6 hours prior | 2026-10-28 17:15 | 714.54 | 715.00 | -0.46 |
| 12 hours prior | 2026-10-28 11:15 | 714.54 | 715.00 | -0.46 |
| 24 hours prior | 2026-10-27 23:15 | 714.55 | 715.00 | -0.45 |
| 48 hours prior | 2026-10-26 23:15 | 714.56 | 715.00 | -0.44 |
*
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
