NV5 - Stiles Mill and Providence Mine

Stiles Mill and Providence Mine

On behalf of the Sierra Streams Institute and the City of Nevada City, NV5 performed predictive human health risk assessments (HHRAs) and engineering evaluations of the historic Stiles Mill site and Providence Mine site, located on Deer Creek in Nevada City.

The Health and Environmental Risk Assessments (HERAs) were approved by the EPA toxicologist with no revisions required.

The HHRAs supported two U.S. Environmental Protection Agency (EPA) Brownfields cleanup grants. We evaluated alternative geotechnical slope stabilization techniques to address mine waste and mill tailings that resided at their angle of repose above the creek.


Nevada City, CA


Sierra Streams Institute; City of Nevada City