Does Gladstone, OR need an earthquake retrofit?

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

Gladstone by the numbers

USGS's underlying values for Gladstone: 0.38g peak ground acceleration, 0.846g at short period, 0.376g at 1 second. Within Oregon alone, Gladstone ranks 46 of 80 cities by seismic hazard - the 43th percentile in-state. Gladstone has a population of about 11,898.

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.

Earthquake insurance for a Gladstone home

A Gladstone 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 Gladstone's figures come from

Gladstone'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 Gladstone.