Gribblenation

Hawaii Route 580 is a 6.68-mile State Highway located on the island of Kauai.  This corridor follows Kuamoo Road from Hawaii Route 56 (Kuhio Highway) near the Wailua River west to the Keahua Stream Bridge in Lihue-Koloa Forest Reserve. Kuamoo Road was part of a series of roadways which were used to access the site of the Wailua Reservoir.  Modern Kuamoo Road was constructed in 1936, and the corridor would be assigned as Hawaii Route 58 when the Hawaii Route System was extended to Kauai in 1955.  Hawaii Route 58 originally terminated at the Wailua Reservoir and ultimately the corridor was renumbered as Hawaii Route 580 to denote it as a secondary highway.   By the 1980s Hawaii Route 580 was extended to a concrete ford at Keahua Stream.  This then new terminus was once planned to connect with a never constructed extension of Hawaii Route 583.  Hawaii Route 580 has become a popular highway used by hikers out of the Keahua Arboretum.  The Keahua Strea...