Glenwood Springs, CO: what USGS's seismic model says

Glenwood Springs carries Seismic Design Category C under USGS's ASCE 7-16 model. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. That puts Glenwood Springs in the 79th percentile nationally for seismic hazard - higher than 79% of the 4,875 US cities USGS was checked against here.

Glenwood Springs by the numbers

USGS's underlying values for Glenwood Springs: 0.273g peak ground acceleration, 0.424g at short period, 0.086g at 1 second. Within Colorado alone, Glenwood Springs ranks 3 of 79 cities by seismic hazard - the 97th percentile in-state. Glenwood Springs has a population of about 10,311.

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 Glenwood Springs 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 Glenwood Springs's figures come from

Glenwood Springs's Category C 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 C does and doesn't tell you about Glenwood Springs.