Whitney Lake: 93.3% full as of 2017-07-21

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, while 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 2017-07-21 93.3 531.33 517,214 516,355 553,344 21,532
Yesterday 2017-07-20 93.7 531.44 519,587 518,728 553,344 21,613
2 days ago 2017-07-19 94.3 531.58 522,619 521,760 553,344 21,716
1 week ago 2017-07-14 95.3 531.83 528,072 527,213 553,344 21,900
1 month ago 2017-06-21 98.0 532.50 542,911 542,052 553,344 22,398
3 months ago 2017-04-21 92.7 531.17 513,778 512,919 553,344 21,412
6 months ago 2017-01-21 88.6 530.09 491,165 490,306 553,344 20,394
1 year ago 2016-07-21 98.4 532.61 545,379 544,520 553,344 22,480
*

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 2017-07-21 23:15 531.20 533.0 -1.8 below flood pool
1 hour prior 2017-07-21 22:15 531.20 533.0 -1.8 below flood pool
2 hours prior 2017-07-21 21:15 531.23 533.0 -1.8 below flood pool
6 hours prior 2017-07-21 17:15 531.29 533.0 -1.7 below flood pool
12 hours prior 2017-07-21 11:15 531.34 533.0 -1.7 below flood pool
24 hours prior 2017-07-20 23:15 531.34 533.0 -1.7 below flood pool
48 hours prior 2017-07-19 23:15 531.48 533.0 -1.5 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1951-01-01
Vertical datum NGVD29
Gauge USGS:08092500
Dead pool elevation 448.83 ft above NGVD29
Service spillway crest elevation 533 ft above NGVD29
Conservation pool elevation 533.0 ft above NGVD29
Top of flood gate elevation 571 ft above NGVD29
Emergency spillway crest elevation 571 ft above NGVD29
Flood pool elevation 571 ft above NGVD29
Maximum design elevation 573 ft above NGVD29
Top of dam elevation 584 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2005-06-01 (source: twdb) : GIS Data

Lake Location