Lake Hallie's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Lake Hallie in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts Lake Hallie in the 3th percentile nationally for seismic hazard - higher than 3% of the 4,875 US cities USGS was checked against here.

Where Lake Hallie sits in Wisconsin

The raw figures: peak ground acceleration 0.022g, short-period spectral response 0.045g, 1-second spectral response 0.032g. Among 157 Wisconsin cities in this dataset, Lake Hallie ranks 150 for seismic hazard, the 4th percentile within the state. About 7,349 people live in Lake Hallie, Wisconsin.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Lake Hallie 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 Lake Hallie address.

More on how this number was built

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