Does Santaquin, UT need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Santaquin 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 Santaquin in the 97th percentile nationally for seismic hazard - higher than 97% of the 4,875 US cities USGS was checked against here.

Santaquin by the numbers

The raw figures: peak ground acceleration 0.783g, short-period spectral response 1.704g, 1-second spectral response 0.627g. Among 95 Utah cities in this dataset, Santaquin ranks 2 for seismic hazard, the 99th percentile within the state. About 18,394 people live in Santaquin, Utah.

What a retrofit costs in Santaquin

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Utah. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Insuring against this, not just retrofitting

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Santaquin address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Santaquin's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.