Lake Graham: 65.8% full as of 2026-09-17
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 | 2026-09-17 | 65.8 | 1,068.00 | 29,807 | 29,793 | 45,288 | 1,924 |
| Yesterday | 2026-09-16 | 65.9 | 1,068.03 | 29,865 | 29,851 | 45,288 | 1,926 |
| 2 days ago | 2026-09-15 | 66.1 | 1,068.08 | 29,962 | 29,948 | 45,288 | 1,930 |
| 1 week ago | 2026-09-10 | 66.8 | 1,068.23 | 30,252 | 30,238 | 45,288 | 1,942 |
| 1 month ago | 2026-08-17 | 70.4 | 1,069.06 | 31,891 | 31,877 | 45,288 | 2,008 |
| 3 months ago | 2026-06-17 | 75.7 | 1,070.23 | 34,299 | 34,285 | 45,288 | 2,114 |
| 6 months ago | 2026-03-17 | - n.a. - | - n.a. - | - n.a. - | - n.a. - | - n.a. - | - n.a. - |
| 1 year ago | 2025-09-17 | 87.5 | 1,072.64 | 39,653 | 39,639 | 45,288 | 2,282 |
*
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 | 2026-09-17 08:00 | 1,068.00 | 1,075.00 | -7.00 |
| 1 hour prior | 2026-09-17 07:00 | 1,068.00 | 1,075.00 | -7.00 |
| 2 hours prior | 2026-09-17 06:00 | 1,067.99 | 1,075.00 | -7.01 |
| 6 hours prior | 2026-09-17 02:00 | 1,068.01 | 1,075.00 | -6.99 |
| 12 hours prior | 2026-09-16 20:00 | 1,068.00 | 1,075.00 | -7.00 |
| 24 hours prior | 2026-09-16 08:00 | 1,068.05 | 1,075.00 | -6.95 |
| 48 hours prior | 2026-09-15 08:00 | 1,068.07 | 1,075.00 | -6.93 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1958-01-01 |
| Vertical datum | NGVD29 +1.3 |
| Dead pool elevation | 1,030.00 ft above NGVD29 +1.3 |
| Service spillway crest elevation | 1,076.30 ft above NGVD29 |
| Top of dam elevation | 1,093.30 ft above NGVD29 |
| Conservation pool elevation | 1,075.00 ft above NGVD29 +1.3 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USGS:08088400 |
| USGS Monitoring Location | USGS:08088400 |
Lake Location
