Does Crestwood, KY need an earthquake retrofit?

Crestwood carries Seismic Design Category C under USGS's ASCE 7-16 model. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. That puts Crestwood in the 68th percentile nationally for seismic hazard - higher than 68% of the 4,875 US cities USGS was checked against here.

How Crestwood compares

USGS's underlying values for Crestwood: 0.088g peak ground acceleration, 0.181g at short period, 0.093g at 1 second. Within Kentucky alone, Crestwood ranks 37 of 79 cities by seismic hazard - the 54th percentile in-state. Crestwood has a population of about 6,493.

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 Kentucky 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 Kentucky.

Insuring against this, not just retrofitting

A Crestwood 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 Crestwood's figures come from

Crestwood's Category C 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 C does and doesn't tell you about Crestwood.