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Ihi'ihilauakea Bridge

Ihi’ihilauakea Bridge is located along Kalanianaole Highway on the East side of O’ahu.  It is a reinforced concrete open spandrel arch bridge, built in 1931, and while not currently listed on the Historic Bridge Inventory, the bridge was deemed eligible for listing.  Therefore, standards for historic preservation were considered during the design.  

Bridge Inspection

Many of our staff are NHI Certified Bridge Inspectors and provide these services regularly to agencies such as the State DOT, City & County of Honolulu, and the US Navy.  Whether they are large, wide freeway structures in Honolulu or old, remote bridges in Hana, Nagamine Okawa can perform the inspections and prepare the reports in the format required.  Our engineers performed the Initial Bridge Inspections for several sections of the H-3 Freeway and received an Award of Excellence for their efforts. 

Umauma Bridge

Initially performed field investigations for emergency repair to severely corroded steel, then provided design for widening and strengthening of the bridge while satisfying historic preservation concerns.

Anahulu Bridge

Performed inspection, retrofit analysis, and prepared repair and safety upgrade design for this famous bridge in Haleiwa, while preserving the original architectural and historical appearance.  Repairs completed minimized disruption to vehicular traffic while remaining open to pedestrian traffic and extended the service life of the bridge.

This project was presented with a Historic Renovation Award by the American Public Works Association, Hawaii Chapter.