Does Goose Creek, SC need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Goose Creek 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. That puts Goose Creek in the 98th percentile nationally for seismic hazard - higher than 98% of the 4,875 US cities USGS was checked against here.

How Goose Creek compares

USGS's underlying values for Goose Creek: 1.208g peak ground acceleration, 1.799g at short period, 0.536g at 1 second. Within South Carolina alone, Goose Creek ranks 3 of 66 cities by seismic hazard - the 97th percentile in-state. Goose Creek has a population of about 50,352.

What a retrofit costs in Goose Creek

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 South Carolina 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 South Carolina.

Insuring against this, not just retrofitting

A Goose Creek 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 Goose Creek's figures come from

Goose Creek'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 Goose Creek.