The Keahua Arboretum in the Keahua State Forest in Kauai, Hawaii is home to native plants and vegetation and is enjoyed by locals and tourists for picnicking, swimming, hiking, biking and horseback riding.

The original route in and out, a concrete roadway, had sunk over time and flooded after heavy rains. Safe
passage over the Keahua Stream was not always possible in this remote but highly traveled area. The decision was made to construct a permanent bridge at the site, along with new roadway alignment and a drainage culvert with inlet and outlet.

The decision to use an Acrow structure for the crossing made sense for the tight construction zone, as Acrow’s modular components can be installed more easily than most other styles of bridges in constrained build areas.

The single-lane bridge is 110 feet long (33.53m) by 13.78 feet (4.2m) wide, with a coated deck and special
3-foot-wide (1m) sidewalk. As specified by the Hawaii Department of Land and Natural Resources (DLNR), it has a two-part paint system to cover all surfaces of the galvanized steel to enhance protection against corrosion. As with all Acrow products, the bridge will be virtually maintenance-free with a lifespan of 75 years or more.