Arvada, CO: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Arvada in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Arvada sits at the 60th percentile for seismic hazard among 4,875 US cities.

Where Arvada sits in Colorado

The raw figures: peak ground acceleration 0.128g, short-period spectral response 0.229g, 1-second spectral response 0.061g. Among 79 Colorado cities in this dataset, Arvada ranks 24 for seismic hazard, the 71th percentile within the state. About 121,873 people live in Arvada, Colorado.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Arvada home

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 Arvada address.

More on how this number was built

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