Lake Alan Henry is 90.1% full as of 2016-08-27

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.

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Most recent 2016-08-27 90.1 2,216.42 85,457 85,457 94,808 2,518
1 day prior 2016-08-26 90.2 2,216.44 85,507 85,507 94,808 2,519
2 days prior 2016-08-25 90.1 2,216.41 85,431 85,431 94,808 2,518
1 week prior 2016-08-20 90.3 2,216.50 85,658 85,658 94,808 2,522
1 month prior 2016-07-27 92.4 2,217.25 87,564 87,564 94,808 2,559
3 months prior 2016-05-27 94.8 2,218.14 89,862 89,862 94,808 2,605
6 months prior 2016-02-27 94.1 2,217.89 89,212 89,212 94,808 2,592
1 year prior 2015-08-27 98.0 2,219.31 92,948 92,948 94,808 2,672
*

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 2016-08-27 23:30 2,216.41 2,220.0 -3.6 below flood pool
1 hour prior 2016-08-27 22:30 2,216.42 2,220.0 -3.6 below flood pool
2 hours prior 2016-08-27 21:30 2,216.40 2,220.0 -3.6 below flood pool
6 hours prior 2016-08-27 17:30 2,216.42 2,220.0 -3.6 below flood pool
12 hours prior 2016-08-27 11:30 2,216.43 2,220.0 -3.6 below flood pool
24 hours prior 2016-08-26 23:30 2,216.43 2,220.0 -3.6 below flood pool
48 hours prior 2016-08-25 23:30 2,216.45 2,220.0 -3.6 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1994-01-01
Vertical datum NGVD29
Gauge USGS:08079700
Service spillway crest elevation 2220 ft above NGVD29
Conservation pool elevation 2220.0 ft above NGVD29
Emergency spillway crest elevation 2240 ft above NGVD29
Maximum design elevation 2245 ft above NGVD29
Top of dam elevation 2263 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1993-10-01 (source: usgs)
1994-01-01 (source: usgs)
2005-07-01 (source: twdb) : GIS Data