Des Moines River, about 2.5 miles southwest of Pella, Iowa

Size of Dam

Length is 5,676 feet; height is 110 feet

Energy Production

178,000 megawatt-hours (estimated annual average)

Energy Sources

43% of our members’ energy comes from federal hydroelectricity, wind, and solar.

Investing in theFuture

Missouri River Energy Services (MRES) is developing a new hydroelectric facility that will add to our members’ renewable resource portfolio, and will help meet the growing energy needs of our members and their customers.

The Red Rock Hydroelectric Project (RRHP) is licensed at 36.4 megawatts (MW) of electricity, or enough energy to meet the needs of about 18,000 homes. It will be operational in mid-2019.


2,000-cubic-yard concrete pour set to take place at the Red Rock Hydroelectric Project

Aug 31, 2017

The largest concrete pour to date at the Red Rock Hydroelectric Project construction site is expected to take place during the week of Aug. 21. Missouri River Energy Services is building the project adjacent to the Red Rock Dam on the Des Moines River southwest of Pella, Iowa.

This is the first concrete placement that will outline the footprint of the intake structure on the dam’s upstream side. It will involve 200 truckloads or 2,000 cubic yards of concrete. This single pour is enough concrete to build 167 feet of a single lane of interstate highway. It is estimated that the pour will take a minimum of 20 hours to complete and, for the most part, will be conducted at night. The placement will be approximately 60 feet by 112 feet and between 7 and 10 feet thick.

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First piece of equipment goes in at the Red Rock Hydroelectric Project

Dec 29, 2016

For almost a year and a half, construction work at the Red Rock Hydroelectric Project (RRHP) consisted of “deconstruction” or site preparation work. Temporary coffer dams and a dike were installed to allow work on dry ground, concrete retaining walls were poured, and more than 200,000 cubic yards of dirt and bedrock were excavated; all to prepare for the construction of a power house and water intake structure.

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Corps of Engineers officers visit Red Rock Hydroelectric Project

Apr 01, 2016

Mississippi Valley Division Commander Major General Michael Wehr, Rock Island District Commander Colonel Craig Baumgartner, and others from the U.S. Army Corps of Engineers attended a presentation Tuesday concerning the development and progress at the Red Rock Hydroelectric Project.

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Heller calls for streamlined permitting for hydro projects

Aug 17, 2016

MRES CEO Tom Heller participated in a panel discussion May 6 during a U.S. Department of Energy Quadrennial Energy Review (QER) in Des Moines.

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