Joe Pool Lake: 98.2% full as of 2026-07-30

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 2026-07-30 98.2 521.59 148,279 146,909 149,629 6,586
Yesterday 2026-07-29 98.3 521.61 148,410 147,040 149,629 6,591
2 days ago 2026-07-28 98.4 521.65 148,674 147,304 149,629 6,601
1 week ago 2026-07-23 99.2 521.83 149,866 148,496 149,629 6,644
1 month ago 2026-06-30 100.0 522.11 151,736 149,629 149,629 6,725
3 months ago 2026-04-30 100.0 522.40 153,695 149,629 149,629 6,781
6 months ago 2026-01-30 99.1 521.80 149,667 148,297 149,629 6,637
1 year ago 2025-07-30 99.8 521.96 150,732 149,362 149,629 6,672
*

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 2026-07-30 15:00 521.58 522.00 -0.42 below flood pool
1 hour prior 2026-07-30 14:00 521.58 522.00 -0.42 below flood pool
2 hours prior 2026-07-30 13:00 521.58 522.00 -0.42 below flood pool
6 hours prior 2026-07-30 09:00 521.58 522.00 -0.42 below flood pool
12 hours prior 2026-07-30 03:00 521.59 522.00 -0.41 below flood pool
24 hours prior 2026-07-29 15:00 521.60 522.00 -0.40 below flood pool
48 hours prior 2026-07-28 15:00 521.64 522.00 -0.36 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1986-01-01
Vertical datum NGVD29
Dead pool elevation 466.00 ft above NGVD29
Emergency spillway crest elevation 541.00 ft above NGVD29
Flood pool elevation 536.00 ft above NGVD29
Maximum design elevation 559.50 ft above NGVD29
Top of dam elevation 564.50 ft above NGVD29
Conservation pool elevation 522.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1970-01-01 (source: USACE)
2022-05-01 (source: TWDB) : GIS Data
Data Source USGS:08049800
USGS Monitoring Location USGS:08049800

Lake Location