Enhance and improve current facilities for storage and distribution of R-1 water to support an enhanced sustainable water system, healthier ecosystems, diversified economy into the future

Project Description

Enhance and improve current facilities for storage and distribution of R-1 water

Initial phases in this multi-year, multi-phase project to be requested in a more than $62 million ($15.6 million federal, $46.8 million County) construction and design grant by the County of Maui Department of Environmental Management to the U.S. Department of the Interior (DOI), Bureau of Reclamation (BOR), WaterSMART: Title XVI Congressionally Authorized Water Reclamation and Reuse Projects:

  • 1) Effluent Pump Station
  • (2) Honokowai Reservoir Site Improvements
  • (3) Honokowai Pressurized R-1 Waterline
  • (4) Honoapiilani Highway Recycled Water Lateral Installation
  • (5) Kaanapali Resort R-1 Water Distribution System Expansion
  • (6) Honokowai R-1 Distribution System Expansion
  • (9) Lahaina Waste Water Reclamation Facility R-1 Process Expansion

These phases are being included at this time as they fit into the project feasibility study enabled by a more than $1 million grant provided by the DOI BOR

Ongoing support for additional phases of the project, including:

  • (7) Lahaina Recycled Water Reservoir and Force Main Rehabilitation
  • (8) Lahaina Siphon and Ditch Rehabilitation

Existing recycled water demand for the project area (see below) is 1.44 million gallons per day (mgd), expected to increase 1.91 mgd after the first three phases of the project are constructed; a result of the distribution expansion phases will result in 2.62 mgd.

Purpose
  • A more sustainable water system, healthier ecosystems, diversified economy into the future
  • Better meet anticipated growth in potable water demand; according to the Maui Island Plan, the West Maui population is anticipated to grow by 64% between 2015 and 2035
Alignment with West Maui Community Plan (WMCP)

Policy 2.3.14 - Reuse of treated effluent and the reduction of sedimentation of near shore waters shall be pursued to protect and enhance the region's land, water, and marine environments.

Action 1.33 - Identify and encourage potential new users of recycled water, including parks, golf courses, and agriculture, and expand recycled water storage and conveyance systems in West Maui to increase the reuse of recycled water.

Policy 1.34 - Study and implement disposal methods and strive to eliminate the use of underground injection control wells, to transition to environmentally sound methods of wastewater disposal and promote beneficial use of wastewater effluent.

Interdependencies and Roadblocks
  • DOI BOR Congressionally Authorized WaterSMART grant ($20 million authorization for feasibility study and initial phases of the project) - submission, grant award
  • Permitting (State Department of Health)
Resources Needed: 
  • County support through Mayor and County Council
Next Steps
Project Details

Cost Estimate:

  • $62M+ for the initial phases
  • $89M overall 
  • Date of Estimate: 8-28-24

Potential Funding Sources:

  • U.S. Department of Agriculture Rural Development water loans and grants
  • Department of Health State Revolving Funds
  • County funds

Existing funding sources: 

  • DOI BOR Congressionally Authorized WaterSMART grant for initial phases
  • County Infrastructure Ordinance, General Excise Tax

Project Lead

  • County of Maui Department of Environmental Management
  • Key community members, businesses, nonprofits

Project Partners

KEY IMPLEMENTERS:

  • County of Maui Department of Environmental Management
  • County of Maui Department of Water Supply

KEY SUPPORTERS:

  • Mayor
  • County Council
  • County of Maui Department of Agriculture
  • State of Hawaii Department of Health (permitting, regulation of R-1 water)
  • State of Hawaii Department of Agriculture
  • State of Hawaii Office of Hawaiian Affairs
  • Community Stakeholders
  • Landowners and Water Users
  • Hawaii Farmers Union United
  • State of Hawaii Department of Hawaiian Home Lands
  • Watershed Partnerships
  • Hawaii Community Foundation Fresh Water Initiative and Hawaiian Islands Environmental Finance Center
  • Ulupono Federal Funding Initiative

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