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: 73.2% full as of 2022-10-02

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 2022-10-02 73.2 1,514.84 21,241 21,241 29,003 881
Yesterday 2022-10-01 73.3 1,514.86 21,258 21,258 29,003 881
2 days ago 2022-09-30 73.4 1,514.89 21,285 21,285 29,003 883
1 week ago 2022-09-25 73.8 1,515.03 21,408 21,408 29,003 887
1 month ago 2022-09-02 75.4 1,515.54 21,863 21,863 29,003 905
3 months ago 2022-07-02 80.2 1,517.12 23,262 23,262 29,003 958
6 months ago 2022-04-02 85.1 1,518.64 24,680 24,680 29,003 1,000
1 year ago 2021-10-02 91.0 1,520.37 26,397 26,397 29,003 - n.a. -
*

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 2022-10-02 11:30 1,514.83 1,522.46 -7.63
1 hour prior 2022-10-02 10:30 1,514.83 1,522.46 -7.63
2 hours prior 2022-10-02 09:30 1,514.83 1,522.46 -7.63
6 hours prior 2022-10-02 05:30 1,514.84 1,522.46 -7.62
12 hours prior 2022-10-01 23:30 1,514.84 1,522.46 -7.62
24 hours prior 2022-10-01 11:30 1,514.86 1,522.46 -7.60
48 hours prior 2022-09-30 11:30 1,514.89 1,522.46 -7.57
*

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