E. V. Spence Reservoir: 9.4% full as of 2026-11-13

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 2026-11-13 9.4 1,842.16 48,403 48,403 517,272 3,231
Yesterday 2026-11-12 9.4 1,842.18 48,468 48,468 517,272 3,234
2 days ago 2026-11-11 9.4 1,842.20 48,533 48,533 517,272 3,237
1 week ago 2026-11-06 9.4 1,842.19 48,500 48,500 517,272 3,236
1 month ago 2026-10-13 9.1 1,841.78 47,186 47,186 517,272 3,179
3 months ago 2026-08-13 10.3 1,843.67 53,441 53,441 517,272 3,446
6 months ago 2026-05-13 11.3 1,845.02 58,248 58,248 517,272 3,702
1 year ago 2025-11-13 12.9 1,847.27 66,947 66,947 517,272 3,978
*

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 2026-11-13 22:00 1,842.14 1,898.00 -55.86
1 hour prior 2026-11-13 21:00 1,842.14 1,898.00 -55.86
2 hours prior 2026-11-13 20:00 1,842.14 1,898.00 -55.86
6 hours prior 2026-11-13 16:00 1,842.16 1,898.00 -55.84
12 hours prior 2026-11-13 10:00 1,842.16 1,898.00 -55.84
24 hours prior 2026-11-12 22:00 1,842.17 1,898.00 -55.83
48 hours prior 2026-11-11 22:00 1,842.19 1,898.00 -55.81
*

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