Providence's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Providence in Seismic Design Category D: 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. Nationally, Providence ranks above 89% of the 4,875 cities in this dataset for seismic hazard - the 89th percentile.

Where Providence sits in Utah

USGS's underlying values for Providence: 0.446g peak ground acceleration, 1.03g at short period, 0.346g at 1 second. Within Utah alone, Providence ranks 67 of 95 cities by seismic hazard - the 30th percentile in-state. Providence has a population of about 9,447.

Retrofit economics for Providence

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 Utah 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 Utah.

Insuring against this, not just retrofitting

A Providence 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 Providence's figures come from

Providence's Category D 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 D does and doesn't tell you about Providence.