Brier's Seismic Design Category, explained

Brier 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 Brier in the 91th percentile nationally for seismic hazard - higher than 91% of the 4,875 US cities USGS was checked against here.

Brier by the numbers

USGS's underlying values for Brier: 0.549g peak ground acceleration, 1.283g at short period, 0.452g at 1 second. Within Washington alone, Brier ranks 36 of 125 cities by seismic hazard - the 72th percentile in-state. Brier has a population of about 6,603.

Retrofit economics for Brier

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.

Earthquake insurance for a Brier home

A Brier 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 Brier's figures come from

Brier'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 Brier.