Does Sullivan, MO need an earthquake retrofit?

Sullivan carries Seismic Design Category D under USGS's ASCE 7-16 model. 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, Sullivan ranks above 81% of the 4,875 cities in this dataset for seismic hazard - the 81th percentile.

Sullivan by the numbers

USGS's underlying values for Sullivan: 0.176g peak ground acceleration, 0.34g at short period, 0.149g at 1 second. Within Missouri alone, Sullivan ranks 59 of 135 cities by seismic hazard - the 57th percentile in-state. Sullivan has a population of about 6,925.

Retrofit economics for Sullivan

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 Sullivan home

A Sullivan 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 Sullivan's figures come from

Sullivan'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 Sullivan.