Champlin's Seismic Design Category, explained

Champlin carries Seismic Design Category A under USGS's ASCE 7-16 model. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Rank it against the rest of the country and Champlin sits at the 4th percentile for seismic hazard among 4,875 US cities.

How Champlin compares

The raw figures: peak ground acceleration 0.022g, short-period spectral response 0.048g, 1-second spectral response 0.025g. Among 155 Minnesota cities in this dataset, Champlin ranks 110 for seismic hazard, the 29th percentile within the state. About 23,045 people live in Champlin, Minnesota.

What a retrofit costs in Champlin

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

More on how this number was built

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