Does Columbia City, IN need an earthquake retrofit?

Columbia City carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Columbia City sits at the 38th percentile for seismic hazard among 4,875 US cities.

Where Columbia City sits in Indiana

The raw figures: peak ground acceleration 0.061g, short-period spectral response 0.122g, 1-second spectral response 0.064g. Among 126 Indiana cities in this dataset, Columbia City ranks 88 for seismic hazard, the 30th percentile within the state. About 10,185 people live in Columbia City, Indiana.

Bracing and bolting: the actual cost

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

Insuring against this, not just retrofitting

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 Columbia City address.

More on how this number was built

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