Marysville's Seismic Design Category, explained

Marysville carries Seismic Design Category D under USGS's ASCE 7-16 model. 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. That puts Marysville in the 89th percentile nationally for seismic hazard - higher than 89% of the 4,875 US cities USGS was checked against here.

How Marysville compares

USGS's underlying values for Marysville: 0.463g peak ground acceleration, 1.091g at short period, 0.389g at 1 second. Within Washington alone, Marysville ranks 77 of 125 cities by seismic hazard - the 39th percentile in-state. Marysville has a population of about 76,209.

Retrofit economics for Marysville

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 Marysville 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 Marysville's figures come from

Marysville'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 Marysville.