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R-1 Recycled Water Expansion
Infrastructure
High
High
Design
County
State
County & State
Private
Injection Well
“We need to make use of R-1 water in order to keep the historically drought ridden community with water to keep areas green and mitigating the risk of fires spreading again.”
Community Quote from Long-Term Planning Recovery Survey
Project Description
This project includes a suite of planning, design and construction activities to improve and expand the recycled water distribution infrastructure in West Maui. It will improve, repair and rehabilitate old pipelines, ditches and reservoirs, as well as construct new distribution pipelines, laterals, meters, and other appurtenances to service non-potable water needs from Honokowai to Olowalu. It will expand customer base and usage of recycled water, may potentially provide irrigation to support replanting of native vegetation for erosion control in the impact area and may provide irrigation to a potential firebreak mauka of Lahaina. It includes the following tasks:
- Lahaina Wastewater Treatment Facility (improve, repair and rehabilitate old pipelines, ditches and reservoirs already in place)
- Honokowai R-1 Water Distribution System (sign, permitting, management and construction of new R-1 distribution pipelines, laterals, meters and other appurtenances within Honoapi’ilani Hwy., Lower Honoapi’ilani Road and Kaʻanapali Shores Place)
- Lahaina Recycled Water Force Main (Assessment, design, permitting for the rehabilitation/replacement of an existing 6,700-foot force main, construction of a second force main, pump station, access road and supporting utilities/improvements)
- Lahaina R-1 Recycled Waterline for Firebreak (Development of 5 miles of
16- inch recycled waterline conveying 200,000 gallons of recycled R-1 water daily from an R-1 reservoir, supplied by DEM’s Lahaina Wastewater Treatment Plant)
Purpose
Maximizing the use of recycled water is a high-priority for the community, County and State. With drought conditions increasingly threatening water supplies in West Maui and the scarcity of water resources leading to ongoing concern over water access, the community looks to improve resource management. Utilizing R-1 Recycled Water for agricultural purposes in West Maui, from Olowalu to Honokowai, could positively influence the hydrology of Lahaina and contribute to other restoration efforts including fire mitigation and wetland restoration. R-1 expansion will also decrease reliance on injection wells.
Interdependencies and Roadblocks
Potential challenges could include permitting and access, as some components are planned to impact privately-owned land. This may result in additional projects to complete, beyond those captured in this project.
Next Steps
- A safety analysis of the West Maui reservoirs needs to be completed
- Project design is anticipated in 2025 and construction is anticipated in 2027
Project Details
Cost Estimate:
>$105,000,000
Existing Funding Sources:
- County Department of Water Supply
- Capital Revolving Fund
Project Lead:
- County Department of Environmental Management
Potential Funding Sources:
- Bureau of Reclamation Title XVI
- U.S. Environmental Protection Agency Community Change Grant
- U.S. Environmental Protection Agency Water Quality Improvement Programs
- Improvement District Program
- Water Infrastructure Finance and Innovation Act (WIFIA)
Project Partners:
- County Department of Planning
- County Department of Environmental Management
- County Department of Water Supply
- County Department of Agriculture
- Private Landowners
- State Department of Land and Natural Resources - Commission on Water Resource Management
- Maui Economic Recovery Commission
- State Department of Health, Surface Water Protection Branch
Alignment with West Maui Community Plan (WMCP)
- Goal 2.1 Ready and resilient systems
- WMCP Action 1.30 Improve interconnection between Department of Water Supply subsystems in West Maui.
- WMCP 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.