Recent reporting out of South Maui is a useful reminder that coastal permitting is not only about waves, seawalls, and shoreline setbacks. It is also about where stormwater goes when heavy rain moves from mauka to makai.

Civil Beat reported on May 7 that Maui County is still dealing with chronic flooding in Kīhei after the March Kona low storms damaged roads, opened sinkholes, and exposed long-running drainage problems along low-lying South Kīhei Road. The article pointed to a 2022 Kīhei Drainage Master Plan that identified roughly $200 million in flood-mitigation projects, including detention basins, culvert improvements, and long-term drainage work. Residents and community advocates say the county has mostly focused on patching damaged roads and keeping access open, while larger flood-control projects remain years away.

For shoreline owners, builders, and design teams, the lesson is bigger than one road closure. Kīhei shows how coastal development, old drainage decisions, wetlands, gulches, roads, and sea-level rise can all collide in the same project review.

Why Kīhei flooding matters for SMA permit planning

Maui County’s Special Management Area process applies to development and changes in use near the shoreline. That means an SMA review can look beyond the building footprint and ask how the project fits into the coastal environment around it.

When flooding is part of the local story, reviewers may look closely at questions like:

• Will the project change how runoff moves across the site or onto neighboring properties?
• Are existing drainageways, wetlands, or low-lying areas being preserved or constrained?
• Could grading, paving, walls, or new structures increase flood impacts during a Kona low or other severe storm?
• Does the plan account for shoreline setback rules, flood zones, sea-level-rise exposure, and access during emergencies?
• Is the project relying on public infrastructure that is already stressed or repeatedly damaged?

Those questions matter even for smaller residential work. A project that looks minor on paper can become more complicated if the parcel sits near a drainage corridor, flood-prone road, wetland area, shoreline setback, or public access route.

If you have questions about how flooding, drainage, shoreline setbacks, or SMA permit rules may affect a Hawaii coastal project, contact Shoreline Consulting Hawai‘i at ryan@schawaii.com or call 808-762-2345. Getting the right information early can help avoid redesigns, delays, and missed review issues.

Practical steps for homeowners and builders

The best time to think about drainage and coastal resilience is before plans are finalized. If you are planning work near the shoreline in Kīhei, Lahaina, Kailua, Hale‘iwa, or any other Hawaii coastal community, consider these steps early:

1. Confirm your parcel’s SMA and shoreline status. Check whether the property is inside the Special Management Area, shoreline setback area, flood zone, sea-level-rise exposure area, or another mapped hazard area.

1. Document existing site conditions. Take current photos of drainage patterns, low spots, existing walls, culverts, driveways, vegetation, and any evidence of past flooding or erosion.

1. Study the mauka-to-makai context. Water may enter the site from uphill properties, gulches, roads, or public drainage systems. Your permit narrative should explain that context clearly.

1. Design for less runoff, not more. Permeable surfaces, careful grading, landscape retention, and properly sized drainage features can make a project easier to defend.

1. Plan for agency questions. Be ready to explain how the project protects public access, water quality, neighboring properties, cultural resources, and the shoreline environment.

1. Coordinate specialized input when needed. Some projects may require licensed design professionals, surveyors, wastewater specialists, environmental consultants, or drainage engineers.

How Shoreline Consulting Hawai‘i can help

Shoreline Consulting Hawai‘i helps property owners, businesses, and developers navigate the SMA process with a practical permitting strategy. The team helps assemble the documentation that coastal projects often need, including site information, maps, project narratives, wastewater design support, environmental context, and agency-response materials.

Shoreline Consulting also coordinates with county planning departments, state agencies, cultural practitioners, and trusted licensed professionals when a project requires specialized input. That coordination is especially important when drainage, flood exposure, shoreline movement, or community concerns could affect the approval path.

Just as importantly, Shoreline Consulting monitors policy and on-the-ground developments that can influence how Hawaii counties review coastal projects. The Kīhei flooding discussion shows why that matters: yesterday’s drainage problem can become tomorrow’s permitting question.

Planning ahead protects projects and beaches

Kīhei’s flooding challenges are a clear signal for coastal property owners across Hawaii. Shoreline projects need to be planned with more than the building in mind. They need to account for runoff, access, infrastructure stress, flood exposure, shoreline resources, and the long-term health of Hawaii’s beaches.

Proactive planning will not prevent every delay, but it can make the SMA permit process more organized, more defensible, and less reactive. If you are considering construction, renovation, rebuilding, or site improvements near the coast, Shoreline Consulting Hawai‘i can help you understand the path forward.

For help with a Hawaii SMA permit or shoreline-area project, email ryan@schawaii.com or call 808-762-2345.