Lake Cisco: 42.4% full as of 2026-10-13

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 2026-10-13 42.4 1,502.95 12,287 12,287 29,003 578
Yesterday 2026-10-12 42.4 1,502.96 12,293 12,293 29,003 578
2 days ago 2026-10-11 42.4 1,502.98 12,304 12,304 29,003 578
1 week ago 2026-10-06 42.6 1,503.09 12,369 12,369 29,003 581
1 month ago 2026-09-13 43.3 1,503.40 12,550 12,550 29,003 588
3 months ago 2026-07-13 45.6 1,504.57 13,233 13,233 29,003 614
6 months ago 2026-04-13 48.1 1,505.75 13,944 13,944 29,003 641
1 year ago 2025-10-13 50.4 1,506.81 14,632 14,632 29,003 665
*

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 2026-10-13 16:30 1,502.95 1,522.46 -19.51
1 hour prior 2026-10-13 15:30 1,502.96 1,522.46 -19.50
2 hours prior 2026-10-13 14:30 1,502.96 1,522.46 -19.50
6 hours prior 2026-10-13 10:30 1,502.94 1,522.46 -19.52
12 hours prior 2026-10-13 04:30 1,502.95 1,522.46 -19.51
24 hours prior 2026-10-12 16:30 1,502.96 1,522.46 -19.50
48 hours prior 2026-10-11 16:30 1,503.00 1,522.46 -19.46
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1923-01-01
Vertical datum NGVD29
Service spillway crest elevation 1,522.46 ft above NGVD29
Top of dam elevation 1,528.50 ft above NGVD29
Conservation pool elevation
Start date: 1929-12-01 		1,522.46 ft above NGVD29
Conservation pool elevation
End date: 1929-12-01 		1,496.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: TWDB)
Data Source USGS:08086215
USGS Monitoring Location USGS:08086215

Lake Location