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Wahikuli Subdivision Gravity Sewer System
Inform
High
High
Design
County
State
County & State
Private
Priority Cesspools in Wahikuli Houselots Subdivision
“Connect Wahikuli to the county sewer system. Provide more public information and education on wastewater improvement plans in Wahikuli.”
Community Quote Neighborhood Workshop
Purpose
The enhancement of existing wastewater infrastructure in Lahaina following the August 2023 wildfires, as well as the U.S. Environmental Protection Agency (EPA) Technical Assistance, will provide for more sustainable wastewater management and enhance resident quality of life, promote sustainable economic development, and reduce economic burden on residents returning to their homes.
Project Description
This project will make enhancements to the existing wastewater infrastructure in Lahaina, including planning, design and construction of a proposed gravity sewer system to service approximately 231 households, currently serviced by cesspools. The EPA is providing direct technical assistance to support the County, including the County Department of Environmental Management, Department of Public Works and others, as needed, by developing documents necessary for construction. The intent of this technical assistance is to deliver the project “shovel-ready” to the County for construction implementation. The EPA’s Technical Assistance period of performance is approximately 18 months from contract award date.
Interdependencies and Roadblocks
Lack of funding for construction at the time of writing, compliance with State and federal cross cutters, and applicable County regulations are current roadblocks to implementation of this project. Additional efforts will be needed to incorporate the EPA’s sewer project into a parallel U.S. Army Corps of Engineers (USACE) project in the same vicinity, making sure the designs are prepared in collaboration and navigating the rebuild at the same time as the County is asking for EPA to assist with retainment of easements.
Next Steps
- Federal cross cutters/compliance studies (within 3 weeks of contract award)
- National Environmental Policy Act (NEPA), State Environmental Review Process for the Hawaiʻi State Revolving Fund Programs and National Historic Preservation Act Compliance (within 3 weeks of cross cutter studies
- Topographic Survey and Soil Borings (within 4 weeks of NEPA/SHPD documents)
- 30% Design Drawings (within 4 weeks of topo survey and soil borings)
- 60% Design Drawings (within 4 weeks of topo survey and soil borings)
- 90/100% Design Drawings (within 2 months of 60% design drawings)
- Final Phased Plan for Implementation of Construction Project (within 2 weeks of delivery of 100% drawings)
Project Details
Cost Estimate:
$25 million
Existing Funding Sources:
- County DWS Capital Revolving Fund
- DEM pursuing EPA Community Change Grant funding for construction
- FEMA Mission Assignment to EPA for planning and design
Project Lead:
County Department of Environmental Management
Potential Funding Sources:
- Exploring need for Interagency Reimbursable Work Agreement between EPA and FEMA
- Improvement District Program
- USACE Planning Assistance to States
Project Partners:
- State Department of Health
- U.S. Environmental Protection Agency
Alignment with West Maui Community Plan (WMCP)
- Goal 2.1 Ready and resilient systems
- Action 1.07 Work with the State Department of Health, Clean Water Branch to identify next steps in addressing the impact of sea level rise on on-site disposal systems (i.e., cesspool and septic systems), and develop remediation plans.