Blackfoot, ID: what USGS's seismic model says

Blackfoot 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. Nationally, Blackfoot ranks above 80% of the 4,875 cities in this dataset for seismic hazard - the 80th percentile.

Where Blackfoot sits in Idaho

USGS's underlying values for Blackfoot: 0.164g peak ground acceleration, 0.379g at short period, 0.136g at 1 second. Within Idaho alone, Blackfoot ranks 8 of 36 cities by seismic hazard - the 80th percentile in-state. Blackfoot has a population of about 13,224.

What a retrofit costs in Blackfoot

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 Idaho 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 Idaho.

Earthquake insurance for a Blackfoot home

A Blackfoot 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 Blackfoot's figures come from

Blackfoot'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 Blackfoot.