E. V. Spence Reservoir is 10.0% full as of 2016-05-27

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.

Date Percent Full Mean Water Level
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Today 2016-05-27 10.0 1,843.15 51,670 51,670 517,272 3,367
Yesterday 2016-05-26 10.0 1,843.09 51,469 51,469 517,272 3,358
2 days ago 2016-05-25 10.0 1,843.12 51,569 51,569 517,272 3,363
1 week ago 2016-05-20 10.0 1,843.16 51,704 51,704 517,272 3,368
1 month ago 2016-04-27 9.9 1,843.08 51,435 51,435 517,272 3,357
3 months ago 2016-02-27 9.4 1,842.29 48,825 48,825 517,272 3,250
6 months ago 2015-11-27 8.9 1,841.49 46,269 46,269 517,272 3,143
1 year ago 2015-05-27 4.5 1,832.33 23,104 23,104 517,272 1,946
*

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 2016-05-27 06:00 1,843.16 1,898.0 -54.8 below flood pool
1 hour prior 2016-05-27 05:00 1,843.16 1,898.0 -54.8 below flood pool
2 hours prior 2016-05-27 04:00 1,843.16 1,898.0 -54.8 below flood pool
6 hours prior 2016-05-27 00:00 1,843.10 1,898.0 -54.9 below flood pool
12 hours prior 2016-05-26 18:00 1,843.06 1,898.0 -54.9 below flood pool
24 hours prior 2016-05-26 06:00 1,843.09 1,898.0 -54.9 below flood pool
48 hours prior 2016-05-25 06:00 1,843.12 1,898.0 -54.9 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