Lake Jacksonville: 97.0% full as of 2026-09-19
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 | 2026-09-19 | 97.0 | 421.32 | 24,950 | 24,888 | 25,670 | 1,139 |
| 1 day prior | 2026-09-18 | 97.0 | 421.34 | 24,973 | 24,911 | 25,670 | 1,140 |
| 2 days prior | 2026-09-17 | 97.1 | 421.35 | 24,984 | 24,922 | 25,670 | 1,140 |
| 1 week prior | 2026-09-12 | 97.5 | 421.44 | 25,087 | 25,025 | 25,670 | 1,143 |
| 1 month prior | 2026-08-19 | 96.6 | 421.23 | 24,848 | 24,786 | 25,670 | 1,137 |
| 3 months prior | 2026-06-19 | 100.0 | 422.11 | 25,860 | 25,670 | 25,670 | - n.a. - |
| 6 months prior | 2026-03-19 | 100.0 | 422.10 | 25,848 | 25,670 | 25,670 | - n.a. - |
| 1 year prior | 2025-09-19 | 100.0 | 422.05 | 25,790 | 25,670 | 25,670 | - n.a. - |
*
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 | 2026-09-19 23:15 | 421.31 | 422.00 | -0.69 |
| 1 hour prior | 2026-09-19 22:15 | 421.31 | 422.00 | -0.69 |
| 2 hours prior | 2026-09-19 21:15 | 421.32 | 422.00 | -0.68 |
| 6 hours prior | 2026-09-19 17:15 | 421.31 | 422.00 | -0.69 |
| 12 hours prior | 2026-09-19 11:15 | 421.29 | 422.00 | -0.71 |
| 24 hours prior | 2026-09-18 23:15 | 421.35 | 422.00 | -0.65 |
| 48 hours prior | 2026-09-17 23:15 | 421.35 | 422.00 | -0.65 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1957-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 372.00 ft above NGVD29 |
| Service spillway crest elevation | 422.00 ft above NGVD29 |
| Emergency spillway crest elevation | 431.00 ft above NGVD29 |
| Top of dam elevation | 438.00 ft above NGVD29 |
| Conservation pool elevation | 422.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
| Data Source | USGS:08032200 |
| USGS Monitoring Location | USGS:08032200 |
Lake Location
