Corps increases outflow at Coralville Lake

Corps increases outflow at Coralville Lake

The U.S. Army Corps of Engineers has temporarily increased the outflows at Coralville Lake. The increase began Wednesday and takes outflows from 10,000 to 12,000 cubic feet per second (cfs).

The Corps says the increase is needed due to recent heavy rainfall in the Iowa River Basin and subsequent lake levels at Coralville Lake. The lake level was using 75 percent of the available flood storage as of Wednesday morning and is expected to crest on Monday using 90 percent of the available flood storage.    The 12,000 cfs will be held until the lake level falls over 1 foot per day.

Due to flooding, Taft Speedway in Iowa City remains closed from 115 Taft Speedway to North Dubuque Street. Lower City Park and CRANDIC Park also remain closed, as do portions of the Iowa River Trail as well as the trail underneath Interstate 80 near Waterworks Park and the trail near Hills Bank along South Gilbert Street.

Updated information about Coralville Lake levels, Iowa River flow and projected rainfall amounts is available online at