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: 70.3% full as of 2023-03-28

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 2023-03-28 70.3 1,513.88 20,376 20,376 29,003 847
Yesterday 2023-03-27 70.3 1,513.89 20,385 20,385 29,003 848
2 days ago 2023-03-26 70.3 1,513.90 20,394 20,394 29,003 848
1 week ago 2023-03-21 70.2 1,513.86 20,358 20,358 29,003 846
1 month ago 2023-02-28 70.7 1,514.03 20,510 20,510 29,003 852
3 months ago 2022-12-28 72.0 1,514.43 20,869 20,869 29,003 865
6 months ago 2022-09-28 73.6 1,514.97 21,356 21,356 29,003 885
1 year ago 2022-03-28 85.3 1,518.69 24,727 24,727 29,003 1,002
*

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 2023-03-28 12:30 1,513.87 1,522.46 -8.59
1 hour prior 2023-03-28 11:30 1,513.89 1,522.46 -8.57
2 hours prior 2023-03-28 10:30 1,513.88 1,522.46 -8.58
6 hours prior 2023-03-28 06:30 1,513.87 1,522.46 -8.59
12 hours prior 2023-03-28 00:30 1,513.88 1,522.46 -8.58
24 hours prior 2023-03-27 12:30 1,513.89 1,522.46 -8.57
48 hours prior 2023-03-26 12:30 1,513.90 1,522.46 -8.56
*

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