Does Kirkwood, MO need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Kirkwood in Seismic Design 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. Nationally, Kirkwood ranks above 83% of the 4,875 cities in this dataset for seismic hazard - the 83th percentile.

Kirkwood by the numbers

USGS's underlying values for Kirkwood: 0.238g peak ground acceleration, 0.423g at short period, 0.156g at 1 second. Within Missouri alone, Kirkwood ranks 28 of 135 cities by seismic hazard - the 80th percentile in-state. Kirkwood has a population of about 29,348.

What a retrofit costs in Kirkwood

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 Kirkwood 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 Kirkwood's figures come from

Kirkwood'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 Kirkwood.