Pat Mayse Lake is 96.3% 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 96.3 450.25 113,646 109,486 113,683 5,557
1 day prior 2016-08-26 96.3 450.25 113,646 109,486 113,683 5,557
2 days prior 2016-08-25 96.3 450.24 113,590 109,430 113,683 5,556
1 week prior 2016-08-20 95.6 450.10 112,813 108,653 113,683 5,541
1 month prior 2016-07-27 97.2 450.44 114,703 110,543 113,683 5,577
3 months prior 2016-05-27 100.0 452.32 125,380 113,683 113,683 - n.a. -
6 months prior 2016-02-27 100.0 452.32 125,380 113,683 113,683 - n.a. -
1 year prior 2015-08-27 - n.a. - - n.a. - - n.a. - - n.a. - - n.a. - - 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 2016-08-28 05:00 450.24 451.0 -0.8 below flood pool
1 hour prior 2016-08-28 04:00 450.24 451.0 -0.8 below flood pool
2 hours prior 2016-08-28 03:00 450.25 451.0 -0.8 below flood pool
6 hours prior 2016-08-27 23:00 450.25 451.0 -0.8 below flood pool
12 hours prior 2016-08-27 17:00 450.25 451.0 -0.8 below flood pool
24 hours prior 2016-08-27 05:00 450.26 451.0 -0.7 below flood pool
48 hours prior 2016-08-26 05:00 450.23 451.0 -0.8 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1967-01-01
Vertical datum NGVD29
Gauge USGS:07335390
Gauge USACE:MYST2
Gauge USGS:07335390
Dead pool elevation 415.0 ft above NGVD29
Service spillway crest elevation 451 ft above NGVD29
Conservation pool elevation 451.0 ft above NGVD29
Emergency spillway crest elevation 477 ft above NGVD29
Flood pool elevation 460.5 ft above NGVD29
Top of dam elevation 488.5 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1967-01-01 (source: usgs)
2008-07-01 (source: twdb) : GIS Data