E. V. Spence Reservoir: 28.7% full as of 2019-09-20

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, and (2) 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 2019-09-20 28.7 1,862.91 148,489 148,489 517,272 6,660
Yesterday 2019-09-19 28.7 1,862.93 148,622 148,622 517,272 6,664
2 days ago 2019-09-18 28.8 1,862.95 148,756 148,756 517,272 6,669
1 week ago 2019-09-13 28.9 1,863.06 149,491 149,491 517,272 6,694
1 month ago 2019-08-20 29.8 1,863.71 153,891 153,891 517,272 6,847
3 months ago 2019-06-20 31.7 1,865.13 163,882 163,882 517,272 7,194
6 months ago 2019-03-20 27.1 1,861.62 140,080 140,080 517,272 6,378
1 year ago 2018-09-20 12.1 1,846.16 62,589 62,589 517,272 3,874
*

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 2019-09-20 08:00 1,862.90 1,898.00 -35.10 below flood pool
1 hour prior 2019-09-20 07:00 1,862.90 1,898.00 -35.10 below flood pool
2 hours prior 2019-09-20 06:00 1,862.91 1,898.00 -35.09 below flood pool
6 hours prior 2019-09-20 02:00 1,862.91 1,898.00 -35.09 below flood pool
12 hours prior 2019-09-19 20:00 1,862.93 1,898.00 -35.07 below flood pool
24 hours prior 2019-09-19 08:00 1,862.92 1,898.00 -35.08 below flood pool
48 hours prior 2019-09-18 08:00 1,862.94 1,898.00 -35.06 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 1,790.00 ft above NGVD29
Service spillway crest elevation 1,878.00 ft above NGVD29
Top of flood gate elevation 1,900.00 ft above NGVD29
Emergency spillway crest elevation 1,908.00 ft above NGVD29
Top of dam elevation 1,928.00 ft above NGVD29
Conservation pool elevation 1,898.00 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