Whitney Lake: 92.3% full as of 2026-09-14

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 2026-09-14 92.3 531.04 522,407 521,053 564,808 21,462
1 day prior 2026-09-13 92.5 531.11 523,910 522,556 564,808 21,520
2 days prior 2026-09-12 92.7 531.15 524,773 523,419 564,808 21,553
1 week prior 2026-09-07 93.8 531.44 531,059 529,705 564,808 21,794
1 month prior 2026-08-14 97.3 532.34 551,038 549,684 564,808 22,613
3 months prior 2026-06-14 100.0 533.24 571,762 564,808 564,808 - n.a. -
6 months prior 2026-03-14 95.1 531.77 538,298 536,944 564,808 22,088
1 year prior 2025-09-14 98.4 532.61 557,176 555,822 564,808 22,861
*

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 2026-09-15 03:15 531.01 533.00 -1.99 below flood pool
1 hour prior 2026-09-15 02:15 531.01 533.00 -1.99 below flood pool
2 hours prior 2026-09-15 01:15 531.01 533.00 -1.99 below flood pool
6 hours prior 2026-09-14 21:15 531.02 533.00 -1.98 below flood pool
12 hours prior 2026-09-14 15:15 531.03 533.00 -1.97 below flood pool
24 hours prior 2026-09-14 03:15 531.06 533.00 -1.94 below flood pool
48 hours prior 2026-09-13 03:15 531.13 533.00 -1.87 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1951-01-01
Vertical datum NGVD29
Dead pool elevation 448.83 ft above NGVD29
Service spillway crest elevation 533.00 ft above NGVD29
Top of flood gate elevation 571.00 ft above NGVD29
Emergency spillway crest elevation 571.00 ft above NGVD29
Flood pool elevation 571.00 ft above NGVD29
Maximum design elevation 573.00 ft above NGVD29
Top of dam elevation 584.00 ft above NGVD29
Conservation pool elevation
Start date: 1972-03-01 		533.00 ft above NGVD29
Conservation pool elevation
Start date to end date: 1969-03-01 to 1972-02-29 		523.00 ft above NGVD29
Conservation pool elevation
Start date to end date: 1968-03-01 to 1969-02-28 		522.00 ft above NGVD29
Conservation pool elevation
End date: 1968-02-29 		520.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1959-01-01 (source: USACE)
2005-06-01 (source: TWDB) : GIS Data
Data Source USGS:08092500
USGS Monitoring Location USGS:08092500

Lake Location