Clinton's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Clinton is Category C. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Rank it against the rest of the country and Clinton sits at the 68th percentile for seismic hazard among 4,875 US cities.

Clinton by the numbers

USGS's underlying values for Clinton: 0.08g peak ground acceleration, 0.167g at short period, 0.091g at 1 second. Within Illinois alone, Clinton ranks 63 of 330 cities by seismic hazard - the 81th percentile in-state. Clinton has a population of about 6,881.

Bracing and bolting: the actual cost

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 Illinois 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 Illinois.

Earthquake insurance for a Clinton home

A Clinton 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 Clinton's figures come from

Clinton's Category C 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 C does and doesn't tell you about Clinton.