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

Author:

Publisher:

Published: 1989

Total Pages: 387

ISBN-13:

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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.

General Reevaluation Report and Environmental Impact Statement for the Blanchard River, Ottawa, Ohio Flood Protection Project
General Reevaluation Report and Environmental Impact Statement for the Blanchard River, Ottawa, Ohio Flood Protection Project

Author: CORPS OF ENGINEERS BUFFALO NY BUFFALO DISTRICT.

Publisher:

Published: 1987

Total Pages: 391

ISBN-13:

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Several measures and plans were considered and investigated during the reevaluation study to select a plan with the greatest NED benefit. Most plans were dropped from further consideration in the process because they lacked economic justification and did not warrant further investigation. The emphasis in this stage of planning is limited to an iteration of 11 structural alternatives. 7 non-structural alternatives, and selection of a recommended plan. Principal considerations in this effort were: the views of local interests, residents of the projects area and the local sponsors; development and presentation of additional and/or refined economic, environmental and engineering data; and preparation of the Environmental Impact Statement. The impacts of viable alternatives were then examined in comparative form to justify the Selected Plan. Plan E, the NED plan, is a combination of structural Plan B and nonstructural Plan C, having net benefits of 19,400 and a B/C ratio of 1.18 to 1. This plan could be implemented at total first cost of 1,387,900 January 1986 price levels and the cost includes all lands easements, and right-of-way at January 1986 price levels. (FR).