Does Park Hills, MO need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Park Hills is Category D. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Rank it against the rest of the country and Park Hills sits at the 85th percentile for seismic hazard among 4,875 US cities.

How Park Hills compares

The raw figures: peak ground acceleration 0.306g, short-period spectral response 0.552g, 1-second spectral response 0.208g. Among 135 Missouri cities in this dataset, Park Hills ranks 11 for seismic hazard, the 93th percentile within the state. About 8,705 people live in Park Hills, Missouri.

Retrofit economics for Park Hills

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Missouri. 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 Park Hills address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Park Hills'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.