Kewanee's Seismic Design Category, explained

Kewanee 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. Nationally, Kewanee ranks above 35% of the 4,875 cities in this dataset for seismic hazard - the 35th percentile.

Kewanee by the numbers

The raw figures: peak ground acceleration 0.057g, short-period spectral response 0.117g, 1-second spectral response 0.071g. Among 330 Illinois cities in this dataset, Kewanee ranks 267 for seismic hazard, the 19th percentile within the state. About 12,146 people live in Kewanee, Illinois.

Retrofit economics for Kewanee

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

Earthquake insurance for a Kewanee 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 Kewanee address.

More on how this number was built

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