The Idaho-Maryland is an underground mine.
New mining will take place deep below the surface. Except for the Service Shaft, mining would take place at least 500 ft below surface and typically 1000 ft and deeper and vibrations rapidly decrease with distance.
Blasting is typically done between shift changes, twice per day, and completed in less than a minute.
Technical analysis, performed by an expert PhD in blasting, show that the anticipated vibrations from drilling and blasting underground is negligible, and in almost all situation will be unnoticeable and undetectable.
1) Based on calculations presented in Precision Blasting Services. (2019). Environmental Factors of Blasting Report for the Proposed Idaho-Maryland Gold Project, Nevada County, California. Montville, OH.
2) Caltrans Transportation and Construction Vibration Guidance Manual 2020