Does Dowagiac, MI need an earthquake retrofit?

Dowagiac 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, Dowagiac ranks above 33% of the 4,875 cities in this dataset for seismic hazard - the 33th percentile.

Dowagiac by the numbers

The raw figures: peak ground acceleration 0.055g, short-period spectral response 0.11g, 1-second spectral response 0.057g. Among 153 Michigan cities in this dataset, Dowagiac ranks 24 for seismic hazard, the 85th percentile within the state. About 5,742 people live in Dowagiac, Michigan.

Bracing and bolting: the actual cost

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

More on how this number was built

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