Site work for a water / sewer project in Ketchikan, Alaska. Conceptual plans call for site work for a water / sewer project.

Installed in 1992, the 1680-feet of ductile iron water main located beneath the exposed portions of the Tongass Ave. & Water St. viaducts is in poor condition. Submerged in salt water during high tides, galvanic corrosion has degraded many of the individual galvanized suspension components. The concrete roadway consists of both precast concrete girder spans as well as flat slab sections. While the ductile iron pipe is readily supported by galvanized pipe chairs attached to the girders, it is a different matter at the flat slab roadway sections. Here steel mechanical couplings were needed to create longer pipe segments between the individual pipe supports that are fastened to the concrete flat slab section as well as providing the necessary deflection where needed to avoid other existing concrete structures under the viaduct. Services to individual waterfront buildings and fire hydrants are in equally bad shape. Rather than attempting repairs, this entire water main needs to be replaced with modern, non-corrodible HDPE pipe This project is in included in the City of Ketchikan FY 2023 - 2027 CIP. As of February 27, 2023, further details regarding design and construction have not been identified. *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available.