Does Spanish Fork, UT need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Spanish Fork 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, Spanish Fork ranks above 95% of the 4,875 cities in this dataset for seismic hazard - the 95th percentile.

Where Spanish Fork sits in Utah

USGS's underlying values for Spanish Fork: 0.666g peak ground acceleration, 1.473g at short period, 0.54g at 1 second. Within Utah alone, Spanish Fork ranks 13 of 95 cities by seismic hazard - the 87th percentile in-state. Spanish Fork has a population of about 47,809.

What a retrofit costs in Spanish Fork

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 Utah 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 Utah.

Insuring against this, not just retrofitting

A Spanish Fork 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 Spanish Fork's figures come from

Spanish Fork'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 Spanish Fork.