Does Redwood Falls, MN need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Redwood Falls in Seismic Design Category A: 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 Redwood Falls sits at the 10th percentile for seismic hazard among 4,875 US cities.

Redwood Falls by the numbers

USGS's underlying values for Redwood Falls: 0.029g peak ground acceleration, 0.062g at short period, 0.03g at 1 second. Within Minnesota alone, Redwood Falls ranks 10 of 155 cities by seismic hazard - the 94th percentile in-state. Redwood Falls has a population of about 5,038.

Bracing and bolting: the actual cost

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 Minnesota 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 Minnesota.

Earthquake insurance for a Redwood Falls home

A Redwood Falls 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 Redwood Falls's figures come from

Redwood Falls's Category A 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 A does and doesn't tell you about Redwood Falls.