Does Steamboat Springs, CO need an earthquake retrofit?

Steamboat Springs carries Seismic Design Category D under USGS's ASCE 7-16 model. 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 Steamboat Springs in the 88th percentile nationally for seismic hazard - higher than 88% of the 4,875 US cities USGS was checked against here.

How Steamboat Springs compares

The raw figures: peak ground acceleration 0.417g, short-period spectral response 0.595g, 1-second spectral response 0.103g. Among 79 Colorado cities in this dataset, Steamboat Springs ranks 1 for seismic hazard, the 100th percentile within the state. About 13,620 people live in Steamboat Springs, Colorado.

What a retrofit costs in Steamboat Springs

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 Steamboat Springs 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 Steamboat Springs address.

More on how this number was built

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