Lake Jacksonville: 91.9% full as of 2022-12-09

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

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 2022-12-09 91.9 420.16 23,648 23,586 25,670 1,106
1 day prior 2022-12-08 91.8 420.14 23,626 23,564 25,670 1,106
2 days prior 2022-12-07 91.8 420.13 23,615 23,553 25,670 1,105
1 week prior 2022-12-02 91.5 420.07 23,549 23,487 25,670 1,104
1 month prior 2022-11-09 90.2 419.77 23,219 23,157 25,670 1,096
3 months prior 2022-09-09 93.4 420.51 24,037 23,975 25,670 1,116
6 months prior 2022-06-09 99.8 421.96 25,685 25,623 25,670 1,161
1 year prior 2021-12-09 99.1 421.79 25,489 25,427 25,670 1,154
*

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 2022-12-10 03:15 420.17 422.00 -1.83
1 hour prior 2022-12-10 02:15 420.15 422.00 -1.85
2 hours prior 2022-12-10 01:15 420.14 422.00 -1.86
6 hours prior 2022-12-09 21:15 420.17 422.00 -1.83
12 hours prior 2022-12-09 15:15 420.15 422.00 -1.85
24 hours prior 2022-12-09 03:15 420.16 422.00 -1.84
48 hours prior 2022-12-08 03:15 420.13 422.00 -1.87
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1957-01-01
Gauge USGS:08032200
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

Elevation-Area-Capacity Curves

1957-01-01 (source: USGS)
2006-05-01 (source: TWDB) : GIS Data

Lake Location