Osage Beach's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Osage Beach in Seismic Design Category C: 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 Osage Beach sits at the 68th percentile for seismic hazard among 4,875 US cities.

Where Osage Beach sits in Missouri

The raw figures: peak ground acceleration 0.09g, short-period spectral response 0.187g, 1-second spectral response 0.105g. Among 135 Missouri cities in this dataset, Osage Beach ranks 81 for seismic hazard, the 40th percentile within the state. About 5,123 people live in Osage Beach, Missouri.

Retrofit economics for Osage Beach

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.

Earthquake insurance for a Osage Beach home

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 Osage Beach address.

More on how this number was built

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