E. V. Spence Reservoir: 17.0% full as of 2025-01-13

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 2025-01-13 17.0 1,852.08 87,994 87,994 517,272 4,682
Yesterday 2025-01-12 17.0 1,852.11 88,134 88,134 517,272 4,686
2 days ago 2025-01-11 17.0 1,852.12 88,181 88,181 517,272 4,687
1 week ago 2025-01-06 17.1 1,852.17 88,415 88,415 517,272 4,692
1 month ago 2024-12-13 17.4 1,852.46 89,781 89,781 517,272 4,726
3 months ago 2024-10-13 17.4 1,852.52 90,065 90,065 517,272 4,733
6 months ago 2024-07-13 14.2 1,848.81 73,281 73,281 517,272 4,308
1 year ago 2024-01-13 16.3 1,851.31 84,422 84,422 517,272 4,597
*

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 2025-01-13 21:00 1,852.07 1,898.00 -45.93
1 hour prior 2025-01-13 20:00 1,852.07 1,898.00 -45.93
2 hours prior 2025-01-13 19:00 1,852.07 1,898.00 -45.93
6 hours prior 2025-01-13 15:00 1,852.08 1,898.00 -45.92
12 hours prior 2025-01-13 09:00 1,852.08 1,898.00 -45.92
24 hours prior 2025-01-12 21:00 1,852.09 1,898.00 -45.91
48 hours prior 2025-01-11 21:00 1,852.12 1,898.00 -45.88
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1969-01-01
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
Data Source USGS:08123950

Lake Location