1. ERDC Knowledge Core
2. United States Army Corps of Engineers (USACE)
3. Pacific Ocean Division
4. Alaska District
5. Environmental Documents

Title:	Navigation Improvements Interim Feasibility Report and Final Environmental Impact Statement : Akutan, Alaska
Authors:	United States. Army. Corps of Engineers. Alaska District.
Keywords:	Akutan Bay (Alaska)--Harbors Environmental protection Environmental management
Publisher:	United States. Army. Corps of Engineers. Alaska District.
Abstract:	This report examines the need for protected harbor space at Akutan, Alaska and determines the feasibility of Federal participation in harbor improvements. There are no permanent moorage facilities for the fishing fleet operating out of Akutan. Vessels must travel to other locations to find moorage when fishing seasons are closed. Vessels seek protection in Akutan from storms during the fishing season. The current practice is to anchor with engines running in case the anchors drag or cruise around the bay. This increases the risk of vessels running aground and of oil spills from damaged vessels. Two sites were evaluated, North Point and at the head of the bay. An economically justified project was not possible at North Point, so alternatives at the head of the bay were investigated. Three concepts were developed: offshore harbor, inland/offshore harbor, and inland harbor. The inland concept proved to be most cost effective, and 12-, 15-, and 20-acre basin alternatives were developed. The 20-acre basin had the highest net economic benefits, indicating that the NED plan would be a 20-acre basin or larger. The environmentally and locally preferred plan is the 12-acre basin alternative, because it has the least environmental impact to the adjacent wetlands and avoids anadromous fish streams on either side of the site. The 12-acre basin was reconfigured to with the intent to increase water exchange in the basin and further reduce impacts to the adjacent wetlands. The recommended plan and locally preferred plan is the reconfigured 12-acre basin, which provides protected moorage for 58 vessels ranging in length from under 24 feet up to 180 feet. The features contributing to the recommended plan have a construction cost of $18,998,000 (October 2003 price level), excluding navigation aids, an annual NED investment cost of $1,242,000, and annual benefits of $2,267,000. The project's benefit-to-cost-ratio is 1.8 with annual net benefits of $1,025,000. The local sponsor is required to pay the non-federal share of the costs of constructing the general navigation features (GNF) as specified by Section 101 of the Water Resources Development Act of 1986 (Public Law 99-662), as amended. This amount is currently estimated at $2,264,000. The local sponsor must also pay the entire cost of local NED features, including the mooring basin and float system. The current estimate of the total nonfederal share of all costs of the project is $9,828,000. The Federal share of the project is $9,170,000, excluding $15,000 for navigational aids. The U.S. Coast Guard provides these navigation aids. The fully funded cost of the NED plan, escalated to the mid-point of construction, is estimated at $20,699,000.
Description:	Feasibility Report and Environmental Impact Statement
Rights:	Approved for Public Release; Distribution is Unlimited
URI:	https://hdl.handle.net/11681/39020
Size:	372 pages / 21.65 MB
Types of Materials:	PDF
Appears in Collections:	Environmental Documents