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

Title:	Integrated Feasibility Report, Environmental Assessment and Finding of No Significant Impact : Salmon Creek Flood Risk Management Section 205, Seward, Alaska, Alaska District, Pacific Ocean Division
Authors:	United States. Army. Corps of Engineers. Alaska District.
Keywords:	Seward (Alaska) Flood control Environmental protection Environmental management
Publisher:	United States. Army. Corps of Engineers. Alaska District.
Abstract:	This report examines the need for construction of flood risk management measures along the upper reaches of Salmon Creek near Seward, Alaska and determines the feasibility of Federal participation in the potential improvements. Flood-related problems on this stretch of stream derive from the alluvial nature of the area in which streams meander through a wide footprint, often selecting relic channels during high flow events, flooding structures and depositing material. Currently, Seward Bear Creek Flood Service Area, a subsidiary of the Kenai Peninsula Borough, is charged with conducting flood-fighting activities along this and other area streams. During high flow events, bulldozers push river-run material into a temporary berm to act as a channel training structure, confining flows from Salmon Creek to its main channel. This study evaluated a number of alternatives based on economic, engineering, environmental, and other factors. Alternative L3 maximizes the net National Economic Development benefits and has been selected as the National Economic Development Plan. The non-Federal partner (Kenai Peninsula Borough) supports this plan, which is carried forward as the Recommended Plan. The Recommended Plan provides an armored revetment, approximately 1,500 feet in length, which will provide flood risk management to the area. Construction will require the upgrade of 3,225 feet of mud trail to accommodate equipment. Minor recreation features will be included to facilitate the public’s enjoyment of the area after construction has been completed. The Recommended Plan has a construction cost of approximately $3.28 million (2015 price levels). The annual investment cost of the project, including the cost of operation and maintenance, is $139,000 with annual National Economic Development benefits of $436,000. The project’s benefits to cost ratio is 3.14 with net annual benefits of $297,000. The local sponsor, Kenai Peninsula Borough, will be required to pay the non-Federal share of 35 percent of the costs assigned to flood risk management features of the project as specified by the Flood Control Act of 1948, as amended, and also will be required to pay 50 percent of the costs assigned to recreation features of the project as specified by The Flood Control Act of 1944, as amended. The estimated non-Federal share of construction is $1.16 million, which includes $1.13 million for flood risk management measures and $22,000 for recreation features. The non-Federal partner will also be responsible for operation and maintenance of the project. The Federal share of the project is $2.16 million, which includes $2.14 million for flood risk management measures and $22,000 for recreation features.
Description:	Integrated Feasibility Report, Environmental Assessment and Finding of No Significant Impact
Rights:	Approved for Public Release; Distribution is Unlimited
URI:	https://hdl.handle.net/11681/38941
Size:	204 pages / 8.44 MB
Types of Materials:	PDF
Appears in Collections:	Environmental Documents