E. V. Spence Reservoir: 18.6% full as of 2022-12-10

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 2022-12-10 18.6 1,853.85 96,466 96,466 517,272 4,896
Yesterday 2022-12-09 18.7 1,853.86 96,515 96,515 517,272 4,897
2 days ago 2022-12-08 18.7 1,853.87 96,564 96,564 517,272 4,898
1 week ago 2022-12-03 18.7 1,853.88 96,613 96,613 517,272 4,900
1 month ago 2022-11-10 18.9 1,854.13 97,842 97,842 517,272 4,932
3 months ago 2022-09-10 19.7 1,854.99 102,141 102,141 517,272 5,067
6 months ago 2022-06-10 22.4 1,857.59 115,984 115,984 517,272 5,591
1 year ago 2021-12-10 25.3 1,860.13 130,799 130,799 517,272 6,089
*

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 2022-12-10 01:00 1,853.85 1,898.00 -44.15
1 hour prior 2022-12-10 00:00 1,853.85 1,898.00 -44.15
2 hours prior 2022-12-09 23:00 1,853.84 1,898.00 -44.16
6 hours prior 2022-12-09 19:00 1,853.85 1,898.00 -44.15
12 hours prior 2022-12-09 13:00 1,853.86 1,898.00 -44.14
24 hours prior 2022-12-09 01:00 1,853.86 1,898.00 -44.14
48 hours prior 2022-12-08 01:00 1,853.87 1,898.00 -44.13
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1969-01-01
Gauge USGS:08123950
Vertical datum NGVD29
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