2024-05-14 FHWA Request to SHPD for No Adverse Effect Concurrence

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4 taken place in or around the APE. Our SHPD Library research found no record of archaeological studies completed near the project area and APE. FHWA identified one historic property in the APE through research and consultation. Nanue Stream Bridge is listed on the State of Hawaii Department of Transportation State Historic Bridge Inventory and Evaluation (SHBIE) (2013). Nanue Stream Bridge is listed twice in the SHBIE. The following is summarized from pages 6-11 and 6-149: Nanue Stream Bridge (Bridge Number 001000190308146)was constructed in 1952. It is a steel trestle bridge type with concrete open horizontal parapet/railing type, and it is listed on the Hawaii Register with a high preservation value. Its character defining features are: • One of six registered steel trestle bridges on the Hamakua coast • Uncommon use of steel material in Hawaii's extreme marine environment • Engineering significance of the trestle structure of the early twentieth century • Associated with the sugar plantation industry • Associated with the Hilo Railroad Company • Associated with three founders of the Hilo railroad company • See National Register of Historic Places Nomination Form in appendices • Associated with Post-War Hawaii Belt Road District • See Hawaii Belt Road historic context Chapter 2.5 Assessment of Effects Typically, bridge rehabilitation results in an effect in historic properties. However, we are implementing the following as mitigation to retain the original appearance and integrity of Nanue Stream Bridge. • Replacing in-kind steel truss members, bearings, gusset plates, nearly identical components to the original rivets, etc. that have corrosion and section loss; • Addressing spalls delamination in the concrete deck, bridge railings, column pedestals and foundations, such that the original characteristics are retained; • Cleaning and painting the steel members following the repairs to a near resemblance of the original bridge; and • Addressing scour deficiencies for the bridge foundations to maintain the original substructure.