Heavy Rainfall Increases Coralville Lake Outflow

Heavy rainfall over portions of north central Iowa on Monday has increased runoff into Coralville Reservoir from its 3,084 square-mile watershed.

To manage pool levels and maintain flood storage capacity, the U.S. Army Corps of Engineers will gradually increase Coralville Lake outflows on the Iowa River from a current rate of 10,000 cubic feet per second (cfs) to 15,000 cfs, and then increase the outflow to 18,000 cfs on July 3. This outflow will remain in effect until further notice.

Increased inflow into the Coralville Reservoir on the Iowa River is causing the pool level to rise significantly. Today, the Coralville Lake level is at 702.17 feet and will continue to rise over the next several weeks. Inflow into the reservoir is expected to raise the pool level to approximately 711.5 feet on or around July 9. This level represents use of 97 percent of flood storage capacity with a pool level .5 feet below the emergency spillway at 712 feet.  The record high stage at Coralville Reservoir was 717.02 feet on June 15, 2008.

If water overtops the spillway, increased flooding can be expected in the Iowa City area. To reduce the risk of this occurring, the Corps increased the release rate from the Coralville Reservoir on Tuesday, July 1, to 8,000 cfs and will continue to increase the release rate to 18,000 cfs. Additional rainfall and revised National Weather Service forecasts may require increasing outflows beyond 18,000 cfs in an effort to keep the pool level below the spillway.

Downstream residents should be alert to rising water levels as the reservoir outflow is increased.

USACE, July 3, 2014

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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