Corvallis, OR: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Corvallis 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 Corvallis sits at the 88th percentile for seismic hazard among 4,875 US cities.

How Corvallis compares

USGS's underlying values for Corvallis: 0.42g peak ground acceleration, 0.884g at short period, 0.467g at 1 second. Within Oregon alone, Corvallis ranks 20 of 80 cities by seismic hazard - the 76th percentile in-state. Corvallis has a population of about 61,993.

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 Oregon 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 Oregon.

What this means for insurance

A Corvallis 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 Corvallis's figures come from

Corvallis'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 Corvallis.