Does Bladensburg, MD need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Bladensburg is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Bladensburg ranks above 43% of the 4,875 cities in this dataset for seismic hazard - the 43th percentile.

Where Bladensburg sits in Maryland

USGS's underlying values for Bladensburg: 0.068g peak ground acceleration, 0.132g at short period, 0.043g at 1 second. Within Maryland alone, Bladensburg ranks 23 of 46 cities by seismic hazard - the 51th percentile in-state. Bladensburg has a population of about 9,635.

Retrofit economics for Bladensburg

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 Maryland 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 Maryland.

Insuring against this, not just retrofitting

A Bladensburg 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 Bladensburg's figures come from

Bladensburg's Category B 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 B does and doesn't tell you about Bladensburg.