Does Roseburg, OR need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Roseburg is 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 Roseburg sits at the 87th percentile for seismic hazard among 4,875 US cities.

Roseburg by the numbers

USGS's underlying values for Roseburg: 0.396g peak ground acceleration, 0.814g at short period, 0.464g at 1 second. Within Oregon alone, Roseburg ranks 30 of 80 cities by seismic hazard - the 63th percentile in-state. Roseburg has a population of about 23,795.

Retrofit economics for Roseburg

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.

Insuring against this, not just retrofitting

A Roseburg 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 Roseburg's figures come from

Roseburg'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 Roseburg.