Notes

2013-02-12: The rating curve for Lake Cisco has been updated and replaced with data from the Texas Water Development Board's Report 126.

Lake Cisco: 71.2% full as of 2023-02-06

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 2023-02-06 71.2 1,514.18 20,644 20,644 29,003 856
Yesterday 2023-02-05 71.2 1,514.18 20,644 20,644 29,003 856
2 days ago 2023-02-04 71.2 1,514.19 20,653 20,653 29,003 857
1 week ago 2023-01-30 71.2 1,514.18 20,644 20,644 29,003 856
1 month ago 2023-01-06 71.8 1,514.37 20,815 20,815 29,003 863
3 months ago 2022-11-06 72.1 1,514.47 20,906 20,906 29,003 867
6 months ago 2022-08-06 76.7 1,515.99 22,257 22,257 29,003 921
1 year ago 2022-02-06 86.1 1,518.94 24,961 24,961 29,003 1,008
*

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 2023-02-06 16:30 1,514.11 1,522.46 -8.35
1 hour prior 2023-02-06 15:30 1,514.12 1,522.46 -8.34
2 hours prior 2023-02-06 14:30 1,514.18 1,522.46 -8.28
6 hours prior 2023-02-06 10:30 1,514.18 1,522.46 -8.28
12 hours prior 2023-02-06 04:30 1,514.18 1,522.46 -8.28
24 hours prior 2023-02-05 16:30 1,514.18 1,522.46 -8.28
48 hours prior 2023-02-04 16:30 1,514.19 1,522.46 -8.27
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1923-01-01
Gauge USGS:08086215
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
End date: 1929-12-01
1,496.00 ft above NGVD29
Conservation pool elevation
Start date: 1929-12-01
1,522.46 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1974-10-01 (source: TWDB)

Lake Location