Coralville Lake, Iowa

Rock Island District
Published Oct. 1, 2021
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 FY 2020 is $683,499,491. The project includes just over 25,000 acres of fee title lands, 11 recreation areas, 7 campgrounds. FY20 visitation was approximately 1.2 Million visitors, resulting regional economic impacts of $26,071,000 in visitor spending and approx. 310 jobs within 30 miles. Recreation fee collections will likely be over $500,000 this FY.


Project is in operation.


OM - Operations and Maintenance

Flood Control Act of 1938

Additional Information

Summarized Project Costs

Estimated Federal Cost


Estimated Non-Federal Cost


Estimated Total Project Cost


Allocations Prior to FY 2022


FY 2021 Allocation


FY 2022 Allocation


FY 2022 President’s Budget


FY 2022 Total Capability



Major Work Item Prior Fiscal Year

FY 2021:  Funds were used for routine operation and maintenance of the flood control infrastructure to reduce flooding downstream and related water control feature. Funds were 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 maintenance items accomplished include removal of more than 100 trees and their stumps that remained from the Derecho storm, emergency replacement of maintenance shop building roof, contract for 9 asphalt roof conversions to metal roofs, pavement repair, control tower roof replacement, and converting the Administrative Office roof from flat to a pitched metal roof has begun. The two-year undertaking of revising the water regulation plan is nearing its final stages of completion as well.

Major Work Item Current Fiscal Year

FY 2022: If funded, budgeted funds would be used for routine operation and maintenance of the flood control work, Environmental and Recreation related items. Other major items are implementation of the new Water Regulation Plan in CY22, completion of metal pitched Administrative Office Roof, and seven recreation roofs being converted to metal for sustainability purposes. Additional infrastructure funding would also complete non-routine projects that include replacing two restroom/shower facilities, Sandy Beach and West Overlook campsite modernization (upgrade to 50-amp service), miles of road repair, and converting gravel campsite pads to smooth hard surface.