US Army Corps of Engineers
Rock Island District Website

District Projects

Coralville Lake, Iowa

Published March 8, 2019

Coralville Lake Manager
(319) 338-3543 x6304

Coralville, Iowa

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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, 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

Summarized Project Costs

Estimated Federal Cost  N/A 
Estimated Non-Federal Cost  N/A 
Estimated Total Project Cost  N/A 
Allocations Prior to FY 2019  N/A 
FY 2019 Allocation  $5,774,000 
FY 2019 Total Capability  $5,774,000 


Major Work Item Current Year

FY 2019: 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: Complete fabrication of bulkheads, repair of the control tower concrete and sill plates, replace control tower windows, and repair dam road slide area.  Also, convert large flood prone asphalt parking lot to concrete, install new water lines and hydrant infrastructure located within the Sugar Bottom Campground and Day Use Area, and complete the Veteran’s Trail rehab.