Scappoose, OR: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Scappoose 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 Scappoose sits at the 87th percentile for seismic hazard among 4,875 US cities.

Where Scappoose sits in Oregon

USGS's underlying values for Scappoose: 0.399g peak ground acceleration, 0.867g at short period, 0.416g at 1 second. Within Oregon alone, Scappoose ranks 28 of 80 cities by seismic hazard - the 66th percentile in-state. Scappoose has a population of about 8,282.

What a retrofit costs in Scappoose

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.

Earthquake insurance for a Scappoose home

A Scappoose 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 Scappoose's figures come from

Scappoose'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 Scappoose.