Lake Coleman: 88.2% full as of 2021-07-30

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 2021-07-30 88.2 1,714.97 33,612 33,594 38,075 1,733
Yesterday 2021-07-29 88.3 1,714.99 33,646 33,628 38,075 1,734
2 days ago 2021-07-28 88.4 1,715.01 33,681 33,663 38,075 1,734
1 week ago 2021-07-23 89.0 1,715.13 33,889 33,871 38,075 1,738
1 month ago 2021-06-30 89.8 1,715.31 34,203 34,185 38,075 1,743
3 months ago 2021-04-30 84.2 1,714.08 32,088 32,070 38,075 1,693
6 months ago 2021-01-30 86.1 1,714.50 32,803 32,785 38,075 1,709
1 year ago 2020-07-30 93.6 1,716.13 35,642 35,624 38,075 1,768
*

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 2021-07-30 16:30 1,714.98 1,717.50 -2.52 below flood pool
1 hour prior 2021-07-30 15:30 1,714.97 1,717.50 -2.53 below flood pool
2 hours prior 2021-07-30 14:30 1,714.98 1,717.50 -2.52 below flood pool
6 hours prior 2021-07-30 10:30 1,714.98 1,717.50 -2.52 below flood pool
12 hours prior 2021-07-30 04:30 1,714.98 1,717.50 -2.52 below flood pool
24 hours prior 2021-07-29 16:30 1,714.99 1,717.50 -2.51 below flood pool
48 hours prior 2021-07-28 16:30 1,715.02 1,717.50 -2.48 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1966-01-01
Vertical datum NGVD29
Gauge USGS:08140770
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