E. V. Spence Reservoir: 14.6% full as of 2017-05-27

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.

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 2017-05-27 14.6 1,849.36 75,670 75,670 517,272 4,379
Yesterday 2017-05-26 14.6 1,849.37 75,713 75,713 517,272 4,380
2 days ago 2017-05-25 14.6 1,849.35 75,626 75,626 517,272 4,377
1 week ago 2017-05-20 13.2 1,847.63 68,385 68,385 517,272 4,012
1 month ago 2017-04-27 13.5 1,848.05 70,081 70,081 517,272 4,075
3 months ago 2017-02-27 13.7 1,848.24 70,862 70,862 517,272 4,148
6 months ago 2016-11-27 13.5 1,848.01 69,918 69,918 517,272 4,064
1 year ago 2016-05-27 10.1 1,843.31 52,211 52,211 517,272 3,390
*

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 2017-05-27 04:00 1,849.37 1,898.0 -48.6 below flood pool
1 hour prior 2017-05-27 03:00 1,849.38 1,898.0 -48.6 below flood pool
2 hours prior 2017-05-27 02:00 1,849.36 1,898.0 -48.6 below flood pool
6 hours prior 2017-05-26 22:00 1,849.37 1,898.0 -48.6 below flood pool
12 hours prior 2017-05-26 16:00 1,849.38 1,898.0 -48.6 below flood pool
24 hours prior 2017-05-26 04:00 1,849.36 1,898.0 -48.6 below flood pool
48 hours prior 2017-05-25 04:00 1,849.34 1,898.0 -48.7 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1969-01-01
Vertical datum NGVD29
Gauge USGS:08123950
Dead pool elevation 1790.0 ft above NGVD29
Service spillway crest elevation 1878 ft above NGVD29
Conservation pool elevation 1898.0 ft above NGVD29
Top of flood gate elevation 1900 ft above NGVD29
Emergency spillway crest elevation 1908 ft above NGVD29
Top of dam elevation 1928 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1969-01-01 (source: usgs)
1999-07-01 (source: twdb) : GIS Data

Lake Location