US Army Corps of Engineers
Detroit District Website

Public Notice Manager

Apostle Island Marina Breakwater Draft Environmental Assessment and FONSI

United States Army Corps of Engineers, Detroit District
Published May 18, 2021
Expiration date: 6/18/2021



The U.S. Army Corps of Engineers (USACE), Detroit District, has prepared a Preliminary Finding of No Significant Impact, Environmental Assessment (EA), and Section 404(b)(1) Evaluation for placement of fill in waters of the United States for the repair and reconstruction of Apostle Island Marina Breakwater, located in and owned by the City of Bayfield, Bayfield County, Wisconsin. The USACE will provide cost reimbursement up to 75% pursuant to Section 154 of the Consolidated Appropriations Act of 2001 (Public Law 106-554), as amended.

The Apostle Island Marina has three structures that have deteriorated and proposed for reconstruction - timber crib breakwater (East Breakwater), the basin’s southern timber crib edge (A Dock), and the shoreline south of the marina. The proposed work on the East Breakwater includes removing 1,000 cubic yards (CYD) of existing stone from the South Shoreline and resetting it at the East Breakwater, placing geotextile fabric, adding 5,040 CYD more of stone (to achieve the total stone needed for all three layers of the revetment), driving 410 linear feet (LF) for the interior steel sheet pile (SSP) wall, reconstructing utilities and the timber walkway and placing culverts in selective sections of the breakwater to maintain some of the existing openings and to allow some additional water exchange for basin flushing. The reconstruction of A Dock includes removal of the finger piers and utilities, driving 300 LF of SSP wall, placing geotextile fabric, backfilling with 150 CYD of material to replace the existing timbers, installing new utilities, installing a new concrete sidewalk and resetting the finger piers. The repairs to the south 600 LF of shoreline includes excavation of 5,715 CYD of southern shoreline and lakebed to incorporate the revetment section with slopes ranging from 1.5H:1V to 2.5H:1V plus placement of geotextile fabric and 6,515 CYD of stone (this is the total stone needed for all three layers of the revetment). The proposed work will be contracted by the City of Bayfield. This public notice initiates a 30-day agency/public review of the proposed action.

The USACE’s preliminary environmental analysis indicates that implementing the proposed project work would not be injurious to the public interest nor constitute a major Federal action that significantly affects the quality of the human environment. No significant short term, long term, or cumulative environmental effects would result from constructing the proposed project. Adverse effects would be minor, limited primarily to short-term noise and air emission from construction equipment operation.

The EA may be viewed online at the following web address: Other Public Notices (

Electronic copies of this Public Notice and EA are being sent to federal, state, and local agencies, Tribes, interested groups, and individuals. The USACE is soliciting comments from the public to consider and evaluate the impacts of the proposed activity. Any person who

has a concern/interest or has historical/cultural interests that may be affected by the proposed project may submit written comments within the comment period of this notice. Comments must clearly set forth what interest may be affected by the proposed activity and how the action significantly affects the quality of the human environment. If no comments are received by the end of the thirty (30) day review period, it will be assumed that no comments are forthcoming. Because of the COVID-19 virus, please provide all comments by email to: All comments received will be taken under consideration, as applicable.

Following the comment period and a review of the comments received, the USACE Detroit District Engineer will make a final decision regarding the necessity of preparing an Environmental Impact Statement (EIS) for the proposed project. Based on the preliminary conclusions of the EA and 404(b)(1) Evaluation, early coordination with other Federal and State agencies and Tribes, it appears that implementing the recommended plan would not significantly affect the quality of the human environment. Therefore, preparation of an EIS is not required. As such, a preliminary Finding of No Significant Impact is included in the EA.