Durango, CO: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Durango 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 Durango sits at the 58th percentile for seismic hazard among 4,875 US cities.

Durango by the numbers

USGS's underlying values for Durango: 0.107g peak ground acceleration, 0.212g at short period, 0.065g at 1 second. Within Colorado alone, Durango ranks 49 of 79 cities by seismic hazard - the 38th percentile in-state. Durango has a population of about 19,811.

Bracing and bolting: the actual cost

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Colorado specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Colorado.

What this means for insurance

A Durango homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Durango's figures come from

Durango's Category B and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category B does and doesn't tell you about Durango.