Does Dexter, MO need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Dexter is Category D. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Rank it against the rest of the country and Dexter sits at the 98th percentile for seismic hazard among 4,875 US cities.

Dexter by the numbers

USGS's underlying values for Dexter: 1.014g peak ground acceleration, 1.678g at short period, 0.593g at 1 second. Within Missouri alone, Dexter ranks 4 of 135 cities by seismic hazard - the 98th percentile in-state. Dexter has a population of about 7,890.

What a retrofit costs in Dexter

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 Missouri 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 Missouri.

What this means for insurance

A Dexter 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 Dexter's figures come from

Dexter's Category D 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 D does and doesn't tell you about Dexter.