Snoqualmie, WA: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Snoqualmie 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. Rank it against the rest of the country and Snoqualmie sits at the 90th percentile for seismic hazard among 4,875 US cities.

Where Snoqualmie sits in Washington

USGS's underlying values for Snoqualmie: 0.512g peak ground acceleration, 1.193g at short period, 0.415g at 1 second. Within Washington alone, Snoqualmie ranks 52 of 125 cities by seismic hazard - the 59th percentile in-state. Snoqualmie has a population of about 13,748.

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 Washington 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 Washington.

Insuring against this, not just retrofitting

A Snoqualmie 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 Snoqualmie's figures come from

Snoqualmie'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 Snoqualmie.