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 the


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 2020.



Crane Tips Over at the Red Rock Hydroelectric Project

Nov 28, 2018

A mishap at the Red Rock Hydroelectric Project this afternoon resulted in a crane tipping over on its back. The crane operator was able to jump free and no one was injured in this event.

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Water reintroduced into tailrace as Red Rock Hydroelectric Project construction continues

Oct 05, 2018

Recent high water levels at the Red Rock Dam have slowed construction work on the upstream side of the dam, but work continues to progress well on the downstream side. Read More

T-15 set to reopen Saturday

Sep 28, 2018

It is anticipated that Highway T-15, at the Lake Red Rock Dam, will reopen by 5 p.m., Saturday, Sept. 29, barring weather-related problems.

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Temporary road closure planned for T-15 over dam

Sep 07, 2018

Highway T-15, at the Lake Red Rock Dam, will be closed to through traffic from Sept. 10 through Sept. 26 for permanent repairs to the highway. Signage will be posted for alternate routes during the closure.

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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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