Lake Jacksonville: 100.0% full as of 2024-04-21

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)
Today 2024-04-21 100.0 422.26 26,035 25,670 25,670 - n.a. -
Yesterday 2024-04-20 100.0 422.19 25,953 25,670 25,670 - n.a. -
2 days ago 2024-04-19 100.0 422.21 25,976 25,670 25,670 - n.a. -
1 week ago 2024-04-14 100.0 422.32 26,105 25,670 25,670 - n.a. -
1 month ago 2024-03-21 100.0 422.17 25,929 25,670 25,670 - n.a. -
3 months ago 2024-01-21 94.5 420.76 24,317 24,255 25,670 1,123
6 months ago 2023-10-21 90.9 419.94 23,405 23,343 25,670 1,100
1 year ago 2023-04-21 100.0 422.10 25,848 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 2024-04-21 22:15 422.28 422.00 0.28
1 hour prior 2024-04-21 21:15 422.28 422.00 0.28
2 hours prior 2024-04-21 20:15 422.28 422.00 0.28
6 hours prior 2024-04-21 16:15 422.24 422.00 0.24
12 hours prior 2024-04-21 10:15 422.25 422.00 0.25
24 hours prior 2024-04-20 22:15 422.23 422.00 0.23
48 hours prior 2024-04-19 22:15 422.18 422.00 0.18
*

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

Elevation-Area-Capacity Curves

1957-01-01 (source: USGS)
2006-05-01 (source: TWDB) : GIS Data
Data Source USGS:08032200

Lake Location