Waipahu Wells, Phase IV

Location: Oahu, Hawaii
Client Name: City and County of Honolulu, Board of Water Supply
Date Completed: 2004
Construction Cost: $6,000,000
Disciplines Applied: Water & Wastewater Engineering, Surveying & MappingPlanning & Permitting

Project Description:

The City and County of Honolulu planned the development of Waipahu Wells IV to supplement water supply to the Pearl Harbor District. Development involved conversion of four pre-existing exploratory wells at the project site to production wells.
The project consisted of:

  • Installation of four deepwell pumps with a peak pumping capacity of 8 mgd
  • 20" transmission main from wells to existing 36" cured concrete pipe
  • Control building
  • Chlorination system
  • Granular Activated Carbon (GAC) treatment system with 10 GAC contactor tanks, a 50,000-gallon backwash tank and high flow rate micron filter units and an in-line acid neutralization system with pH and turbidity meters
  • Access roadways
  • Pumps
  • Landscaping

RMTC services consisted of preparing an Environmental Assessment, creating photo-realistic renderings of future conditions, surveying and mapping, and preparing an engineering report and construction documents.