Lake Coleman: 64.1% full as of 2023-10-03

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)
Most recent 2023-10-03 64.1 1,709.21 24,439 24,421 38,075 1,435
1 day prior 2023-10-02 64.3 1,709.24 24,482 24,464 38,075 1,437
2 days prior 2023-10-01 64.3 1,709.26 24,511 24,493 38,075 1,438
1 week prior 2023-09-26 64.7 1,709.37 24,669 24,651 38,075 1,444
1 month prior 2023-09-03 65.6 1,709.60 25,003 24,985 38,075 1,457
3 months prior 2023-07-03 72.6 1,711.36 27,658 27,640 38,075 1,555
6 months prior 2023-04-03 74.7 1,711.88 28,474 28,456 38,075 1,582
1 year prior 2022-10-03 75.7 1,712.11 28,839 28,821 38,075 1,595
*

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 2023-10-04 03:30 1,709.20 1,717.50 -8.30
1 hour prior 2023-10-04 02:30 1,709.20 1,717.50 -8.30
2 hours prior 2023-10-04 01:30 1,709.20 1,717.50 -8.30
6 hours prior 2023-10-03 21:30 1,709.20 1,717.50 -8.30
12 hours prior 2023-10-03 15:30 1,709.22 1,717.50 -8.28
24 hours prior 2023-10-03 03:30 1,709.22 1,717.50 -8.28
48 hours prior 2023-10-02 03:30 1,709.24 1,717.50 -8.26
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1966-01-01
Gauge USGS:08140770
Vertical datum NGVD29
Dead pool elevation 1,662.50 ft above NGVD29
Service spillway crest elevation 1,717.50 ft above NGVD29
Emergency spillway crest elevation 1,726.00 ft above NGVD29
Top of dam elevation 1,740.00 ft above NGVD29
Conservation pool elevation 1,717.50 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2006-08-01 (source: TWDB) : GIS Data

Lake Location