Lake Jacksonville: 97.8% full as of 2026-08-09
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 | 2026-08-09 | 97.8 | 421.52 | 25,179 | 25,117 | 25,670 | 1,145 |
| 1 day prior | 2026-08-08 | 97.9 | 421.54 | 25,201 | 25,139 | 25,670 | 1,146 |
| 2 days prior | 2026-08-07 | 98.0 | 421.56 | 25,224 | 25,162 | 25,670 | 1,146 |
| 1 week prior | 2026-08-02 | 98.7 | 421.71 | 25,397 | 25,335 | 25,670 | 1,151 |
| 1 month prior | 2026-07-09 | 99.9 | 421.97 | 25,697 | 25,635 | 25,670 | 1,162 |
| 3 months prior | 2026-05-09 | 100.0 | 422.09 | 25,836 | 25,670 | 25,670 | - n.a. - |
| 6 months prior | 2026-02-09 | 100.0 | 422.12 | 25,871 | 25,670 | 25,670 | - n.a. - |
| 1 year prior | 2025-08-09 | 99.8 | 421.96 | 25,685 | 25,623 | 25,670 | 1,161 |
*
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 | 2026-08-09 23:15 | 421.49 | 422.00 | -0.51 |
| 1 hour prior | 2026-08-09 22:15 | 421.48 | 422.00 | -0.52 |
| 2 hours prior | 2026-08-09 21:15 | 421.50 | 422.00 | -0.50 |
| 6 hours prior | 2026-08-09 17:15 | 421.51 | 422.00 | -0.49 |
| 12 hours prior | 2026-08-09 11:15 | 421.50 | 422.00 | -0.50 |
| 24 hours prior | 2026-08-08 23:15 | 421.53 | 422.00 | -0.47 |
| 48 hours prior | 2026-08-07 23:15 | 421.55 | 422.00 | -0.45 |
*
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
