Lake Coleman: 91.3% full as of 2019-09-19

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 2019-09-19 91.3 1,715.63 34,762 34,744 38,075 1,753
1 day prior 2019-09-18 91.3 1,715.65 34,797 34,779 38,075 1,754
2 days prior 2019-09-17 91.4 1,715.67 34,832 34,814 38,075 1,754
1 week prior 2019-09-12 91.8 1,715.75 34,973 34,955 38,075 1,757
1 month prior 2019-08-19 93.8 1,716.18 35,731 35,713 38,075 1,770
3 months prior 2019-06-19 100.0 1,717.60 38,275 38,075 38,075 1,814
6 months prior 2019-03-19 99.5 1,717.39 37,895 37,877 38,075 1,807
1 year prior 2018-09-19 79.2 1,712.93 30,166 30,148 38,075 1,650
*

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 2019-09-20 04:30 1,715.61 1,717.50 -1.89 below flood pool
1 hour prior 2019-09-20 03:30 1,715.61 1,717.50 -1.89 below flood pool
2 hours prior 2019-09-20 02:30 1,715.61 1,717.50 -1.89 below flood pool
6 hours prior 2019-09-19 22:30 1,715.62 1,717.50 -1.88 below flood pool
12 hours prior 2019-09-19 16:30 1,715.64 1,717.50 -1.86 below flood pool
24 hours prior 2019-09-19 04:30 1,715.63 1,717.50 -1.87 below flood pool
48 hours prior 2019-09-18 04:30 1,715.65 1,717.50 -1.85 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