Lake Coleman: 92.1% full as of 2020-08-11

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 2020-08-11 92.1 1,715.82 35,096 35,078 38,075 1,759
Yesterday 2020-08-10 92.2 1,715.84 35,131 35,113 38,075 1,760
2 days ago 2020-08-09 92.4 1,715.88 35,201 35,183 38,075 1,761
1 week ago 2020-08-04 93.1 1,716.02 35,448 35,430 38,075 1,765
1 month ago 2020-07-11 95.6 1,716.56 36,406 36,388 38,075 1,782
3 months ago 2020-05-11 96.2 1,716.69 36,637 36,619 38,075 1,786
6 months ago 2020-02-11 86.2 1,714.52 32,837 32,819 38,075 1,709
1 year ago 2019-08-11 94.9 1,716.41 36,139 36,121 38,075 1,777
*

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 2020-08-11 11:30 1,715.81 1,717.50 -1.69 below flood pool
1 hour prior 2020-08-11 10:30 1,715.82 1,717.50 -1.68 below flood pool
2 hours prior 2020-08-11 09:30 1,715.81 1,717.50 -1.69 below flood pool
6 hours prior 2020-08-11 05:30 1,715.82 1,717.50 -1.68 below flood pool
12 hours prior 2020-08-10 23:30 1,715.83 1,717.50 -1.67 below flood pool
24 hours prior 2020-08-10 11:30 1,715.86 1,717.50 -1.64 below flood pool
48 hours prior 2020-08-09 11:30 1,715.89 1,717.50 -1.61 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