Des Peres, MO: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Des Peres 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. Rank it against the rest of the country and Des Peres sits at the 83th percentile for seismic hazard among 4,875 US cities.

Des Peres by the numbers

USGS's underlying values for Des Peres: 0.231g peak ground acceleration, 0.413g at short period, 0.154g at 1 second. Within Missouri alone, Des Peres ranks 32 of 135 cities by seismic hazard - the 77th percentile in-state. Des Peres has a population of about 9,171.

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 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.

Earthquake insurance for a Des Peres home

A Des Peres 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 Des Peres's figures come from

Des Peres'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 Des Peres.