About Us

Terra-Mechanics, Inc. is a WBE (PA UCP Number 13748, OHIO UCP NAICS Code 541690) whose principals have a combined 50 years of experience in the blasting, construction, mining,  sound and vibration industry. Because TMI maintains a low overhead, they are able to pass this savings on and provide a more personalized service directed toward their client’s satisfaction on every project.

TMI is proud to announce the opening of their Limerick, PA office!  Contact information is below!

From top to bottom: Dave Harrison, Betsy Harrison – Allegheny River Bridge Pier Demolition, Remote Monitoring – Harmar Township, PA  Brian Harrison -Setting up a Remote Seismograph for Pile Driving Operations


Dave Harrison



about 4

Betsy Harrison


Bob the builder

Brian Harrison



 Our Business

Terra-Mechanics, Inc. prides itself on effective public relations through education and listening to the concerns of the homeowners and contractors alike. TMI has conducted hundreds of public meetings and thousands of one-on-one inspections with concerned property owners,  striving to answer questions and address problems – and diffusing potentially explosive situations.


Dave Harrison and Vince Papale of the Philadelphia Eagles



Dave Harrison in his role as Program Committee Chairman, ISEE – Nashville, TN 2012