Does Harahan, LA need an earthquake retrofit?

Harahan 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. Nationally, Harahan ranks above 22% of the 4,875 cities in this dataset for seismic hazard - the 22th percentile.

Where Harahan sits in Louisiana

USGS's underlying values for Harahan: 0.042g peak ground acceleration, 0.086g at short period, 0.053g at 1 second. Within Louisiana alone, Harahan ranks 37 of 59 cities by seismic hazard - the 38th percentile in-state. Harahan has a population of about 8,819.

What a retrofit costs in Harahan

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 Louisiana 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 Louisiana.

Insuring against this, not just retrofitting

A Harahan 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 Harahan's figures come from

Harahan'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 Harahan.