Lower Hamakua Ditch Watershed, County of Hawaii, HI

概要

Kenneth M. Kaneshiro, Responsible Federal Official for projects administered under the provisions of Public Law 83-566 in the State of Hawaii, is hereby providing notification that a record of decision to proceed with the installation of the Lower Hamakua Ditch watershed project, signed November 1, 1999, is available. The record of decision documents the intent to implement Alternative 3--Repair and Restoration of the Lower Hamakua Ditch. The project will provide a stable, adequate, and affordable supply of agricultural water to farmers and other agricultural producers in the Lower Hamakua Ditch service area. The improvements will provide structural repair and reduce water losses along the Lower Hamakua Ditch. Twenty-two of the 24 wooden flumes will be replaced with corrugated metal pipe or inverted pipe siphons. Metal I-beams will replace the rotting timber supports. In the open ditch sections, sediment will be removed and the concrete lining will be repaired. The diversion structures at Kawainui, Alakahi, and Koiawe streams will be repaired and modified to prevent structural failure, reduce maintenance requirements, and restore 30 percent of base streamflow to Waipio Valley strea