Does Columbus, WI need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Columbus in Seismic Design Category B: 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 Columbus sits at the 17th percentile for seismic hazard among 4,875 US cities.

Columbus by the numbers

USGS's underlying values for Columbus: 0.033g peak ground acceleration, 0.069g at short period, 0.045g at 1 second. Within Wisconsin alone, Columbus ranks 86 of 157 cities by seismic hazard - the 46th percentile in-state. Columbus has a population of about 5,429.

Retrofit economics for Columbus

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Wisconsin specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Wisconsin.

Earthquake insurance for a Columbus home

A Columbus homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Columbus's figures come from

Columbus's Category B and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category B does and doesn't tell you about Columbus.