O. C. Fisher Lake: 18.5% full as of 2025-07-23

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 2025-07-23 18.5 1,878.79 21,402 21,401 115,742 1,722
Yesterday 2025-07-22 18.5 1,878.83 21,468 21,467 115,742 1,730
2 days ago 2025-07-21 18.6 1,878.86 21,518 21,517 115,742 1,735
1 week ago 2025-07-16 18.8 1,879.02 21,788 21,787 115,742 1,763
1 month ago 2025-06-23 9.2 1,870.44 10,664 10,663 115,742 939
3 months ago 2025-04-23 9.9 1,871.31 11,515 11,514 115,742 1,023
6 months ago 2025-01-23 8.1 1,869.01 9,391 9,390 115,742 845
1 year ago 2024-07-23 1.1 1,854.23 1,250 1,249 115,742 339
*

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 2025-07-23 13:00 1,878.79 1,908.00 -29.21 below flood pool
1 hour prior 2025-07-23 12:00 1,878.78 1,908.00 -29.22 below flood pool
2 hours prior 2025-07-23 11:00 1,878.77 1,908.00 -29.23 below flood pool
6 hours prior 2025-07-23 07:00 1,878.78 1,908.00 -29.22 below flood pool
12 hours prior 2025-07-23 01:00 1,878.80 1,908.00 -29.20 below flood pool
24 hours prior 2025-07-22 13:00 1,878.83 1,908.00 -29.17 below flood pool
48 hours prior 2025-07-21 13:00 1,878.87 1,908.00 -29.13 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1951-01-01
Vertical datum NGVD29
Dead pool elevation 1,840.00 ft above NGVD29
Emergency spillway crest elevation 1,938.50 ft above NGVD29
Flood pool elevation 1,938.50 ft above NGVD29
Maximum design elevation 1,958.00 ft above NGVD29
Top of dam elevation 1,964.00 ft above NGVD29
Conservation pool elevation 1,908.00 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1959-02-01 (source: TWDB)
1962-09-01 (source: USACE)
2003-08-01 (source: USACE)
Data Source USGS:08134500

Lake Location