E. V. Spence Reservoir: 9.2% full as of 2026-10-07

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 2026-10-07 9.2 1,841.98 47,824 47,824 517,272 3,206
Yesterday 2026-10-06 9.3 1,841.99 47,856 47,856 517,272 3,207
2 days ago 2026-10-05 9.3 1,842.02 47,953 47,953 517,272 3,212
1 week ago 2026-09-30 9.3 1,842.09 48,178 48,178 517,272 3,221
1 month ago 2026-09-07 9.8 1,842.87 50,733 50,733 517,272 3,329
3 months ago 2026-07-07 10.6 1,844.07 54,832 54,832 517,272 3,510
6 months ago 2026-04-07 11.5 1,845.33 59,411 59,411 517,272 3,782
1 year ago 2025-10-07 13.5 1,848.01 69,918 69,918 517,272 4,064
*

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 2026-10-07 04:00 1,841.98 1,898.00 -56.02
1 hour prior 2026-10-07 03:00 1,841.98 1,898.00 -56.02
2 hours prior 2026-10-07 02:00 1,841.98 1,898.00 -56.02
6 hours prior 2026-10-06 22:00 1,841.98 1,898.00 -56.02
12 hours prior 2026-10-06 16:00 1,842.00 1,898.00 -56.00
24 hours prior 2026-10-06 04:00 1,842.00 1,898.00 -56.00
48 hours prior 2026-10-05 04:00 1,842.02 1,898.00 -55.98
*

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
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
USGS Monitoring Location USGS:08123950

Lake Location