Edgewood, WA: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Edgewood 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. Nationally, Edgewood ranks above 90% of the 4,875 cities in this dataset for seismic hazard - the 90th percentile.

Edgewood by the numbers

USGS's underlying values for Edgewood: 0.5g peak ground acceleration, 1.279g at short period, 0.439g at 1 second. Within Washington alone, Edgewood ranks 61 of 125 cities by seismic hazard - the 52th percentile in-state. Edgewood has a population of about 13,496.

What a retrofit costs in Edgewood

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 Edgewood home

A Edgewood 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 Edgewood's figures come from

Edgewood'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 Edgewood.