Whitney Lake: 100.0% full as of 2026-06-15

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 2026-06-15 100.0 533.31 573,405 564,808 564,808 - n.a. -
Yesterday 2026-06-14 100.0 533.24 571,762 564,808 564,808 - n.a. -
2 days ago 2026-06-13 100.0 533.31 573,405 564,808 564,808 - n.a. -
1 week ago 2026-06-08 100.0 534.14 593,231 564,808 564,808 - n.a. -
1 month ago 2026-05-15 97.9 532.48 554,213 552,859 564,808 22,742
3 months ago 2026-03-15 95.4 531.86 540,290 538,936 564,808 22,171
6 months ago 2025-12-15 94.4 531.61 534,775 533,421 564,808 21,941
1 year ago 2025-06-15 100.0 535.80 634,784 564,808 564,808 - 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 2026-06-15 12:15 533.31 533.00 0.31 into flood pool
1 hour prior 2026-06-15 11:15 533.31 533.00 0.31 into flood pool
2 hours prior 2026-06-15 10:15 533.31 533.00 0.31 into flood pool
6 hours prior 2026-06-15 06:15 533.31 533.00 0.31 into flood pool
12 hours prior 2026-06-15 00:15 533.31 533.00 0.31 into flood pool
24 hours prior 2026-06-14 12:15 533.22 533.00 0.22 into flood pool
48 hours prior 2026-06-13 12:15 533.29 533.00 0.29 into 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

Lake Location