US Army Corps of Engineers
Omaha District Website Website

Missouri River Water Management News

Missouri River Water Management News Releases are available on the Northwestern Division website.RSS Feed

Cherry Creek Reservoir annual sediment flushing exercise scheduled

Published May 23, 2016
A round of storms Sept. 14, 2013, impacted the Cherry Creek basin causing pool elevations at Cherry Creek reservoir to enter the flood control pool. Cherry Creek peaked at a pool elevation of 5553.4 ft on Sept. 25, more than 12 feet below the record pool of 5565.8 feet in 1973. Major transportation routes and a large population, which makes up the Denver metropolitan area are located downstream from Cherry Creek Dam.

A round of storms Sept. 14, 2013, impacted the Cherry Creek basin causing pool elevations at Cherry Creek reservoir to enter the flood control pool. Cherry Creek peaked at a pool elevation of 5553.4 ft on Sept. 25, more than 12 feet below the record pool of 5565.8 feet in 1973. Major transportation routes and a large population, which makes up the Denver metropolitan area are located downstream from Cherry Creek Dam.

Omaha, NE — The annual sediment flushing exercise will be completed at Cherry Creek Reservoir, near Aurora, Colorado on Wednesday, June 1, 2016.

Katie Seefus, water manager in the U.S. Army Corps of Engineers' Omaha District office, says the exercise involves high releases from each of the five main outlet gates at Cherry Creek Dam, located south of Interstate 225 in Aurora. "When the gates are opened, the high velocity of the water leaving the reservoir scours the area immediately upstream of the gates and transports sediment with the flow," said Seefus. The sediment flush is required to allow proper operation of the outlet gates.

Cherry Creek Dam will begin releasing 50 cubic feet per second (cfs) at 2:30 p.m. on Tuesday, May 31. The actual flushing exercise will begin at 9 a.m. and end at 12 p.m. on Wednesday, June 1 when the release will be set back to normal levels. The travel time from Cherry Creek Dam to the streamgage located at the Champa Street Bridge, is about 6 hours. The following table shows a schedule of the planned releases:

 TASK  TIME
 Gate 1 release 300 cfs  9-9:30 a.m.
 Gate 1 release 1300 cfs  9:30-9:40 a.m.
 Gate 1 release 300 cfs  9:40-10 am
 Gate 1 closed  10 a.m.
 Gate 2 release 1300 cfs  10-10:10 a.m.
 Gate 2 release 300 cfs  10:10-10:30 a.m.
 Gate 2 closed  10:30 a.m.
 Gate 3 release 1300 cfs  10:30-10:40 a.m.
 Gate 3 release 300 cfs  10:40-11:00 a.m.
 Gate 3 closed  11 a.m.
 Gate 4 release 1300 cfs  11-11:10 a.m.
 Gate 4 release 300 cfs  11:10-11:30 a.m.
 Gate 4 closed  11:30 a.m.
 Gate 5 release 1300 cfs  11:30-11:40 a.m.
 Gate 5 release 300 cfs  11:40-12:00 p.m.
 Gate 5 closed  12 p.m.

Omaha District Commander Col. John Henderson asks the public to be aware that the high flows will take some time to reach the downtown channel, and flows from the last gate opened will not reach the downtown channel until late afternoon on Wednesday. The high flows will cause higher than normal creek stages and potential flooding of bike paths and stream crossings. "In the interest of public safety, I urge the public to not attempt to cross the stream during this event," says Henderson.


Contact
Katie Seefus
kathryn.j.seefus@usace.army.mil
or
Eileen Williamson
402-995-2417
eileen.l.williamson@usace.army.mil

Release no. 20160523