Lake Cisco: 60.8% full as of 2024-05-21

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 2024-05-21 60.8 1,510.78 17,635 17,635 29,003 757
Yesterday 2024-05-20 60.8 1,510.79 17,644 17,644 29,003 758
2 days ago 2024-05-19 60.9 1,510.80 17,653 17,653 29,003 758
1 week ago 2024-05-14 60.9 1,510.80 17,653 17,653 29,003 758
1 month ago 2024-04-21 60.8 1,510.78 17,635 17,635 29,003 757
3 months ago 2024-02-21 61.4 1,510.96 17,798 17,798 29,003 762
6 months ago 2023-11-21 61.6 1,511.05 17,878 17,878 29,003 764
1 year ago 2023-05-21 69.0 1,513.48 20,021 20,021 29,003 833
*

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 2024-05-21 08:30 1,510.79 1,522.46 -11.67
1 hour prior 2024-05-21 07:30 1,510.77 1,522.46 -11.69
2 hours prior 2024-05-21 06:30 1,510.78 1,522.46 -11.68
6 hours prior 2024-05-21 02:30 1,510.78 1,522.46 -11.68
12 hours prior 2024-05-20 20:30 1,510.78 1,522.46 -11.68
24 hours prior 2024-05-20 08:30 1,510.79 1,522.46 -11.67
48 hours prior 2024-05-19 08:30 1,510.81 1,522.46 -11.65
*

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
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)
Data Source USGS:08086215

Lake Location