General Reevaluation Report for Flood Control Project: Raccoon River and Walnut Creek, West Des Moines-Des Moines, Iowa with Final Supplement Number 1 to the Final Environmental Impact Statement
General Reevaluation Report for Flood Control Project: Raccoon River and Walnut Creek, West Des Moines-Des Moines, Iowa with Final Supplement Number 1 to the Final Environmental Impact Statement

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Published: 1989

Total Pages: 387

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A feasibility report was developed by the Rock Island District in 1975 for flood damage reduction, along with associated recreation features, for the cities of West Des Moines and Des Moines, Iowa. The project was authorized for construction by the Water Resources Development Act of 1986. The authorized project would provide a Standard Project Flood (SPF) level of protection from the Raccoon River, Walnut Creek, and Jordan Creek along with developing a city park, bicycle path, and boat launch area. The project would cost an estimated $16,220,000 (updated to 1988 price levels) and have a benefit-to-cost (B/C) ratio of 1.3. This GRR recommends continuation into a General Design Memorandum (GDM) phase of post-authorization planning and engineering studies. The cities of West Des Moines and Des Moines, Iowa, will be co-sponsors of the project and will have joint responsibility for operation and maintenance of the project after construction.