Lake Cisco: 42.2% full as of 2026-11-01

Historical Data

Date Percent Full Mean Water Level
(ft) 		Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft) 		Surface Area
(acres)
Most recent 2026-11-01 42.2 1,502.89 12,252 12,252 29,003 576
1 day prior 2026-10-31 42.3 1,502.90 12,258 12,258 29,003 576
2 days prior 2026-10-30 42.3 1,502.90 12,258 12,258 29,003 576
1 week prior 2026-10-25 42.3 1,502.92 12,270 12,270 29,003 577
1 month prior 2026-10-01 42.7 1,503.10 12,375 12,375 29,003 581
3 months prior 2026-08-01 45.1 1,504.31 13,079 13,079 29,003 608
6 months prior 2026-05-01 47.7 1,505.56 13,824 13,824 29,003 637
1 year prior 2025-11-01 49.7 1,506.48 14,410 14,410 29,003 658
*

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 2026-11-02 03:30 1,502.88 1,522.46 -19.58
1 hour prior 2026-11-02 02:30 1,502.89 1,522.46 -19.57
2 hours prior 2026-11-02 01:30 1,502.89 1,522.46 -19.57
6 hours prior 2026-11-01 21:30 1,502.89 1,522.46 -19.57
12 hours prior 2026-11-01 15:30 1,502.90 1,522.46 -19.56
24 hours prior 2026-11-01 03:30 1,502.90 1,522.46 -19.56
48 hours prior 2026-10-31 03:30 1,502.89 1,522.46 -19.57
*

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