Warrenton's Seismic Design Category, explained

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

Where Warrenton sits in Oregon

The raw figures: peak ground acceleration 0.672g, short-period spectral response 1.334g, 1-second spectral response 0.695g. Among 80 Oregon cities in this dataset, Warrenton ranks 6 for seismic hazard, the 94th percentile within the state. About 6,324 people live in Warrenton, Oregon.

What a retrofit costs in Warrenton

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Oregon. 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 Warrenton address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Warrenton'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.