Does Mills River, NC need an earthquake retrofit?

Mills River carries Seismic Design Category C under USGS's ASCE 7-16 model. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Rank it against the rest of the country and Mills River sits at the 76th percentile for seismic hazard among 4,875 US cities.

Where Mills River sits in North Carolina

The raw figures: peak ground acceleration 0.181g, short-period spectral response 0.31g, 1-second spectral response 0.096g. Among 147 North Carolina cities in this dataset, Mills River ranks 3 for seismic hazard, the 99th percentile within the state. About 7,426 people live in Mills River, North Carolina.

Retrofit economics for Mills River

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for North Carolina. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

What this means for insurance

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Mills River address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Mills River's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.