Does Bridgeport, PA need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Bridgeport in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Bridgeport ranks above 57% of the 4,875 cities in this dataset for seismic hazard - the 57th percentile.

How Bridgeport compares

The raw figures: peak ground acceleration 0.103g, short-period spectral response 0.184g, 1-second spectral response 0.048g. Among 193 Pennsylvania cities in this dataset, Bridgeport ranks 19 for seismic hazard, the 91th percentile within the state. About 5,401 people live in Bridgeport, Pennsylvania.

What a retrofit costs in Bridgeport

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Pennsylvania. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Earthquake insurance for a Bridgeport home

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Bridgeport address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Bridgeport's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.