Wellington, CO: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Wellington is 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 Wellington sits at the 55th percentile for seismic hazard among 4,875 US cities.

Wellington by the numbers

The raw figures: peak ground acceleration 0.096g, short-period spectral response 0.183g, 1-second spectral response 0.054g. Among 79 Colorado cities in this dataset, Wellington ranks 60 for seismic hazard, the 24th percentile within the state. About 12,100 people live in Wellington, Colorado.

What a retrofit costs in Wellington

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.

What this means for insurance

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 Wellington address.

More on how this number was built

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