Government

Army Corps of Engineers to increase Coralville Lake Reservoir output

Flood causes Johnson County to close roads, issue voluntary evacuations

Carissa Ebling (from left), 18, of Iowa City, Oriana Ross, 15, of Iowa City, and Harper Robbins, 15, of Tiffin walk along the emergency spillway at the Coralville Reservoir in Johnson County on Saturday, July 30, 2016. (Stephen Mally/The Gazette)
Carissa Ebling (from left), 18, of Iowa City, Oriana Ross, 15, of Iowa City, and Harper Robbins, 15, of Tiffin walk along the emergency spillway at the Coralville Reservoir in Johnson County on Saturday, July 30, 2016. (Stephen Mally/The Gazette)

IOWA CITY — The Army Corps of Engineers began increasing the amount of water flowing out of the Coralville Lake Reservoir Wednesday.

A Johnson County Emergency Management news release said the flow would increase from 10,000 cubic feet per second to 12,000. It will continue at this stage until Coralville Lake levels begin to fall more than a foot per day, according to the release.

While small amounts of rainfall are expected over the next day, the National Weather Services has forcasted no rain over the next seven days, according to the release.

“Obviously this is good news with predicted lake elevations dropping below 711 feet and outflows decreasing to less than 13,000 CFS from the dam. No mandatory evacuations are anticipated due to these changes,” said Dave Wilson, Johnson County Emergency Management director, in the release.

Johnson County Emergency management scheduled a news conference is scheduled for Thursday morning to update “the latest flood conditions and outlook.”

Those downstream of the reservoir can watch for changes at rivergages.com.

Because of flooding threats, voluntary evacuations are recommended for some areas of unincorporated Johnson County at Camino Del Rio SE, Driftwood Lane SE and Ocean Boulevard SE, according to the release.

CLOSURES

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Johnson County Conservation has closed both the Hills Access and the River Junction Access because of flash flooding and rising waters, according to the release.

Road closures are:

• 140th Street west of Ely Road, at Lakeview OHV Park

• Sandy Beach at the beach

• Amana Road between Blain Cemetery and Greencastle Avenue

• Greencastle Avenue Level B, south of Amana Road

• Greencastle Avenue Level B, north of Swan Lake

• Swan Lake Road Level B, west of Half Moon Avenue

• Cosgrove Road south of Black Diamond Road at Old Man’s Creek

• Izaak Walton Road east of S & G Sand Plant including Ocean, Driftwood and Camino Del Rio Roads

• Sand Road south of 560th Street

• Sand Road north of Highway 22

• River Junction Road south of River Junction

• Tri County Bridge Road south of 670th Street

• Y Avenue south of Tri County Bridge Road

• Lola Lane

• Chambers Avenue south of 140th Street to Amana Road

• Hoosier Creek Road west of Ely Road at Naples Avenue

l Comments: (319) 339-3172; maddy.arnold@thegazette.com

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