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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.

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Drinking Water

“Develop a water system that provides adequate water to all and does not depend only on rainfall (desalination plants, wells that provide a lot of water such as the one proposed in upcountry).”

Community Quote from Long-Term Planning Recovery Survey

Purpose

This project aims to increase availability of water to meet community needs. Expanding water availability serves the needs of the community and provides for increased resilience. The draft Maui Island Water Use and Development Plan (2019) adopted strategies to maximize surface water production up to treatment plant capacity when stream flow allows (as the most affordable water supply) and develop sufficient wells to rely on in dry season. This project will aid in the mitigation of drought impacts on the water supply. Additionally, it will enable the use of the Kanahā stream for ecosystem restoration projects as part of rebuilding Lahaina. Increased well capacity will also provide additional water flow for fire suppression.

Project Description

This project will expand water use and availability by increasing access to existing ground water sources and establishing new connections to the County’s potable water system. The project includes the following components:

‍Honokowai Tunnel Intake and Transmission Line
The project would provide a new potable water source by constructing a horizontal tunnel and skimmer well to capture groundwater in Honokowai Valley. No further treatment would be required. The Commission on Water Resource Management (CWRM) has determined that water from the tunnel does not impact stream flows, as stream flows for Honokowai Valley are generated farther upstream. Project benefits include diversification of source, redundancy within the system and provides a lower-cost source alternative than drilling a new well.
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‍Lahaina Wells Development
The project will include development of two well fields in the Launiupoko aquifer and two well fields in the Honolua aquifer to provide additional supply to the Lahaina area to ensure adequate water supply.

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Interdependencies and Roadblocks

Uncertainty over water use permit allocations from Department of Land and Natural Resources (DLNR) CWRM to accommodate new water source development in West Maui, requiring further coordination. There are also private property concerns.

Contact

Project Details

Cost Estimate:

Tunnel Improvements: $4.4 million Wells Development: - Launiupoko: $23.8 million - Honolua: $12.8 million

Existing Funding Sources:

Commission on Water Resource Management - Partial Funding
County Department of Water Supply Capital Revolving Fund
County Department of Water Supply Capital Improvement Program

Project Lead:

County of Maui Department of Water Supply

Potential Funding Sources:

County Department of Water Supply Capital Revolving Fund
FEMA Hazard Mitigation Grant

Project Partners:

County Department of Public Works
State Department of Land and Natural Resources, Commission on Water Resource Management

Alignment with West Maui Community Plan (WMCP)

Goal 2.1 Ready and resilient systems
Action 1.29 Develop basal groundwater sources in West Maui to timely serve planned population growth and offset decreased surface water diversions
Action 1.30 Improve interconnection between Department of Water Supply subsystems in West Maui

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Lahaina Bypass Phase 1C

Extending the Lahaina Bypass from Keawe Street to Kakaalaneo Drive to improve regional access.

Long-Term (6+ years)

Lahaina Royal Complex

Cultural corridor and restoration of Malu 'Ulu o Lele, Moku'ula, and the Loko o Mokuhinia Complex.

Long-Term (6+ years)

Affordable Rental Housing Programs

Rebuilding affordable rental housing lost in the wildfires across ten multifamily developments.

Short-Term (1-2 years)

Creation of a Lahaina Memorial

Creating a Lahaina Memorial honoring lives lost and providing a healing space for the community.

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Lahaina Harbor Restoration

Reconstructing Lahaina Harbor to restore recreational, commercial, and cultural maritime activity.

Mid-Term (3-5 years)

Energy Resilience and Redundancy

Assessing energy infrastructure to improve resilience, backup systems, and West Maui power independence.

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Enhance Emergency Communication Networks

Upgrading emergency communication systems to close gaps and strengthen islandwide response capacity.

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Lahaina Business Project

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Ke Ola Hou

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Long-Term (6+ years)

Kuhua Street Extension

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Mid-Term (3-5 years)

Maui Emergency Management Agency (MEMA) Advancement Program

Improving the County's ability to identify, mitigate, and respond to all-hazard threats islandwide.

Mid-Term (3-5 years)

National Historic Landmark District Update

Preparing an updated National Historic Landmark District nomination for Lahaina to NPS standards.

Short-Term (1-2 years)

R-1 Recycled Water Expansion

Improving and expanding recycled water distribution infrastructure across West Maui communities.

Long-Term (6+ years)

Rebuild the West Maui Senior Center

Rebuilding the West Maui Senior Center facility in Lahaina to restore programs and services for kūpuna.

Mid-Term (3-5 years)

Revegetating and Reforesting Lahaina and Kula

Long-Term (6+ years)

Wahikuli Subdivision Gravity Sewer System

New sewer system for Wahikuli replacing cesspools serving approximately 231 area households.

Long-Term (6+ years)

Stormwater Resilience and Flood Risk Management

Updating drainage plans and developing flood control improvements to protect Lahaina and West Maui.

Mid-Term (3-5 years)

Street Connectivity and Extensions

Fire evacuation connectivity across roadways to support public safety and future emergency response.

Mid-Term (3-5 years)

Wai and Watershed Recovery Planning

Watershed and water recovery planning uniting agencies and communities across Lahaina and Kula.

Mid-Term (3-5 years)

Wildfire Risk Reduction and Mitigation

Reducing wildfire risk through prevention, updated protection plans, and West Maui resilience work.

Mid-Term (3-5 years)

Agriculture Planning & Long-Term Food Security

Planning to develop and prioritize agriculture, farms, food systems, and ecosystems in Lahaina moku.

Mid-Term (3-5 years)

Asset Management and Acquisitions Program

Program acquiring real property in the impact zone, including shoreline parcels facing rising seas.

Short-Term (1-2 years)

Building Resilience Incentives

Incentivizing stronger building codes to increase community resilience against future hazards.

Short-Term (1-2 years)

Community Facilities

Replacement planning for the King Kamehameha III Elementary School and the Lahaina Public Library.

Mid-Term (3-5 years)

Comprehensive Environmental Monitoring and Sampling Plan (CEMSP)

Monitoring environmental conditions and improving public access to environmental health data islandwide.

Short-Term (1-2 years)

Economic Innovation and Development

Targeted funding and training for tech, manufacturing, workforce, and infrastructure development.

Short-Term (1-2 years)

Green Workforce Development

Green job opportunities in Maui supporting environmental restoration and sustainable economic growth.

Long-Term (6+ years)

Healthcare Service Expansion

Assessing gaps in health, behavioral health, and social services to guide expansion across West Maui.

Short-Term (1-2 years)

Homeowner Support Programs

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Short-Term (1-2 years)

Infrastructure Assessment and Improvement Studies

Short-Term (1-2 years)

Inter-Island Ferry System

Supporting ferry service to Lanai, reviving Lahaina service, and expanding routes to Moloka'i.

Long-Term (6+ years)

Lahaina Water Infrastructure Firefighting Capacity

Upgrading Lahaina's water storage, pipelines, and flow capacity to strengthen firefighting response.

Mid-Term (3-5 years)

Long-Term Disaster Case Management Program (DCMP)

Disaster Case Managers guide residents through needs assessment, recovery planning, and long-term care.

Mid-Term (3-5 years)

Lahaina Water Infrastructure Resilience and Hardening

Hardening Lahaina's water system with backup power, added supply, and upgraded critical facilities.

Mid-Term (3-5 years)

Preservation, Revitalization, and Reconstruction of Historic and Cultural Spaces

Rebuilding historic sites, supporting cultural programs, and documenting oral histories of Lahaina.

Long-Term (6+ years)

West Maui Business Center (WMBC)

Continuing the West Maui Business Center to provide tools, resources, and support to local businesses.

Short-Term (1-2 years)

West Maui Greenway

Phase 1 of a 5.25-mile multiuse trail from Lahaina Civic Center to Launiupoko Beach Park in West Maui.

Long-Term (6+ years)

West Maui Hospital

New Critical Access Hospital in West Maui offering emergency, surgical, and inpatient care services.

Long-Term (6+ years)

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Water Source Development

Project Lead

Project Type & Source

Brief Description:

Milestones:

Project Location:

“Develop a water system that provides adequate water to all and does not depend only on rainfall (desalination plants, wells that provide a lot of water such as the one proposed in upcountry).”

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BACK TO ALL PROJECTS

Water Source Development

1-2 years

6+ years

3-5 years

Lahaina Royal Complex Master Plan

“Develop a water system that provides adequate water to all and does not depend only on rainfall (desalination plants, wells that provide a lot of water such as the one proposed in upcountry).”

Purpose

Project Description

Interdependencies and Roadblocks

Contact

Project Details

Cost Estimate:

Existing Funding Sources:

Project Lead:

Potential Funding Sources:

Project Partners:

Alignment with West Maui Community Plan (WMCP)

Explore projects

Lahaina Bypass Phase 1C

Lahaina Royal Complex

Affordable Rental Housing Programs

Creation of a Lahaina Memorial

Lahaina Harbor Restoration

Energy Resilience and Redundancy

Enhance Emergency Communication Networks

Lahaina Business Project

Ke Ola Hou

Kuhua Street Extension

Maui Emergency Management Agency (MEMA) Advancement Program

National Historic Landmark District Update

R-1 Recycled Water Expansion

Rebuild the West Maui Senior Center

Revegetating and Reforesting Lahaina and Kula

Wahikuli Subdivision Gravity Sewer System

Stormwater Resilience and Flood Risk Management

Street Connectivity and Extensions

Wai and Watershed Recovery Planning

Wildfire Risk Reduction and Mitigation

Agriculture Planning & Long-Term Food Security

Asset Management and Acquisitions Program

Building Resilience Incentives

Community Facilities

Comprehensive Environmental Monitoring and Sampling Plan (CEMSP)

Economic Innovation and Development

Green Workforce Development

Healthcare Service Expansion

Homeowner Support Programs

Infrastructure Assessment and Improvement Studies

Inter-Island Ferry System

Lahaina Water Infrastructure Firefighting Capacity

Long-Term Disaster Case Management Program (DCMP)

Lahaina Water Infrastructure Resilience and Hardening

Preservation, Revitalization, and Reconstruction of Historic and Cultural Spaces

West Maui Business Center (WMBC)

West Maui Greenway

West Maui Hospital