US Army Corps of Engineers
Rock Island District Website

District Projects

Coralville Lake, Iowa

Published Sept. 25, 2020
Coralville Dam and Lake located in Coralville, Iowa.

Coralville Dam and Lake located in Coralville, Iowa.

Coralville, Iowa

Coralville Lake is a multiple purpose project providing primary benefits in flood control and low-flow augmentation with secondary benefits in recreation, natural resource management and environmental stewardship. Conservation pool is 5,400 acres; and the flood control pool is 24,800 acres with 475,000 acre-feet of storage. The dam is located on the Iowa River just upstream of Iowa City. 

Cumulative nominal damages prevented since projects inception (1958) through FY18 is $653,854,000, of this $28,869,000 were prevented from the 2018 high water event. The project includes 25,000 acres of fee title lands, 11 recreation areas, and 7 campgrounds. FY18 visitation was approximately 1,118,000 visitors, resulting regional economic impacts of $24,819,000, recreation fee collections of just over $540,000, lease and concessionaire incomes of $233,959. These numbers are down a bit from previous years due to the high water event. 

Project is in operation.

OM - Operations and Maintenance
Flood Control Act of 1938

Additional Information

Summarized Project Costs

Estimated Federal Cost  N/A 
Estimated Non-Federal Cost  N/A 
Estimated Total Project Cost  N/A 
Allocations Prior to FY 2020  N/A 
FY 2020 Allocation  $4.772.000 
FY 2020 Total Capability  $6,956,000 


Major Work Item Current Year
FY 2020: Funds are being used for routine operation and maintenance of the flood control infrastructure to reduce flooding downstream and related water control feature. Funds are also used for minimal operation and maintenance of day-use, overnight recreation areas and facilities as well as for minimal annual stewardship activities to protect the health, sustainability and integrity of the public lands associated with the project. These activities include natural resource management practices, environmental evaluation and reviews, shoreline protection, cultural resource investigations, and water quality control. Non routine projects include: administrative roof replacement, asphalt roof replacement, pavement repair, and shoreline erosion from flood damage, electric issues from flood damage, and wildlife habitat management.

Additional funding would also complete several non-routine projects including Sandy Beach and West Overlook campsite modernization, regulation plan and additional roof replacement.