Does St. Gabriel, LA need an earthquake retrofit?

St. Gabriel carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts St. Gabriel in the 23th percentile nationally for seismic hazard - higher than 23% of the 4,875 US cities USGS was checked against here.

How St. Gabriel compares

The raw figures: peak ground acceleration 0.043g, short-period spectral response 0.088g, 1-second spectral response 0.055g. Among 59 Louisiana cities in this dataset, St. Gabriel ranks 29 for seismic hazard, the 52th percentile within the state. About 6,857 people live in St. Gabriel, Louisiana.

What a retrofit costs in St. Gabriel

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

What this means for insurance

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 St. Gabriel address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced St. Gabriel'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.