Does Millington, TN need an earthquake retrofit?

Millington carries Seismic Design Category D under USGS's ASCE 7-16 model. 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, Millington ranks above 95% of the 4,875 cities in this dataset for seismic hazard - the 95th percentile.

How Millington compares

The raw figures: peak ground acceleration 0.673g, short-period spectral response 1.133g, 1-second spectral response 0.386g. Among 104 Tennessee cities in this dataset, Millington ranks 8 for seismic hazard, the 93th percentile within the state. About 11,486 people live in Millington, Tennessee.

Retrofit economics for Millington

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

Insuring against this, not just retrofitting

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 Millington address.

More on how this number was built

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