Project Lead

County of Maui Department of Water Supply

Project Type

Infrastructure

Plan Alignment

One Water Lahaina (OWL)

Lahaina LTRP

Funding Sources

EPA

Brief Description:

This project will strengthen and harden Lahaina’s water infrastructure by improving system reliability, adding backup power and water supplies, and upgrading critical facilities to support firefighting and emergency response.

Milestones:

Projects are preparing for and currently under construction, including installation of a backup well, replacement of the fire suppression system at the Lahaina WTP, installation of on-site emergency generators, and replacement of treatment equipment. Rehabilitation of exposed waterlines is in assessment and design phase.

Project Location:

“Improve water infrastructure; restore historic waterways and water use dictated by community; control of water returned to land and people; remove private water system; local resource management and generational knowledge.”

Community Quote Neighborhood Workshop



BACK TO ALL PROJECTS

NATURAL & CULTURAL RESOURCES

HOUSING

INFRASTRUCTURE

COMMUNITY PLANNING

ECONOMIC DEVELOPMENT

HEALTH & SOCIAL SERVICES

Lahaina Water Infrastructure Resilience and Hardening

participation

Inform

Complexity

High

Cost

High

Phase

Implementation

Kuleana

County

State

County & State

Private

timing

1-2 years

6+ years

3-5 years

Estimated
completion

Lahaina Royal Complex Master Plan

The County of Maui Department of ʻŌiwi Resources is currently working with Group 70 International, Inc. (G70) to develop the Lahaina Royal Complex Master Plan. The project scope includes hydrology and water policy; wildfire resiliency and risk planning; biological and ecological assessment; cultural landscape architecture; community engagement protocol; transportation circulation planning; topographical survey; cultural and archaeological studies; soils and geotechnical studies; and boundary mapping.

View Presentation

Lahaina Water Treatment Facility

“Improve water infrastructure; restore historic waterways and water use dictated by community; control of water returned to land and people; remove private water system; local resource management and generational knowledge.”

Community Quote Neighborhood Workshop

Purpose

All three of Lahaina’s available water supply points have existing deficiencies that, if failure were to occur, could trigger water shutoffs to Lahaina and exasperate the recovery and rebuilding effort. The Maui Fire Chief’s Wildfire After-action Report dated 4/18/2024 recommended that recovery efforts include increasing the reliability of the Lahaina water system’s ability to meet fire flow requirements and have backup supplies, which will be addressed by this project.

Project Description

This project will increase the reliability of the Lahaina water system’s ability to meet fire flow requirements and have backup supplies by targeting the most severe infrastructure vulnerability and risks within the system. The highest priority projects include:

Replacement of non-functional fire suppression system at Lahaina Water Treatment Facility
Rehabilitation of exposed raw waterline and finish waterline at the Lahaina Water Treatment Facility
Installation of permanent on-site emergency generators and upgrade of outdated motor control systems at Kanahā Wells #1 and #2 and Waipuka Wells #1 and #2
Replacement of outdated backwash filter necessary for water treatment
Installation of Mahinahina Water Treatment Facility backup well to provide backup supplies for up to 6 months
Installation of emergency generator at backup well site at the Mahinahina Water Treatment Facility

Interdependencies and Roadblocks

A resilient and hardened water supply system is essential to restoring the community, creating jobs and building a resilient future. This project will also support the County’s Department of Water Supply in fulfilling its core mission of reliably delivering safe drinking water for generations.

Contact

Project Details

Cost Estimate:

Lahaina Water Treatment Facility Replacements: $1.4 million Kanahā Wells Emergency Generator and Motor Control Center Upgrades: $2.5 million Waipuka Wells Emergency Generator and Motor Control Center Upgrades: $2.5 million Mahinahina Backup Well: $6.23 million Mahinahina Water Treatment Facility Backwash Tank Replacement: $1.9 million

Existing Funding Sources:

Project Lead:

County of Maui Department of Water Supply

Potential Funding Sources:

EPA State and Tribal Assistance Grants
EPA Disaster Supplemental Funding
Department of Interior-DOH State Revolving Fund
EPA Midsize and Large Drinking Water System Infrastructure Resilience and Sustainability Program
FEMA Hazard Mitigation Grant Program
HUD Community Development Block Grant Program
US Bureau of Reclamation Drought Resiliency Projects Grant Program

Project Partners:

County Department of Fire and Public Safety
County Department of Public Works

Alignment with West Maui Community Plan (WMCP)

Goal 2.1 Ready and resilient systems
Action 1.28 Preserve and maintain existing reservoir and water storage infrastructure within West Maui for fire protection capabilities and agricultural uses

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