About

Skelly and Loy, A Terracon Company (S&L) has been delivering mining, civil, and environmental engineering services for more than 50 years. Our Pittsburgh office can help clients in Western Pennsylvania and surrounding communities with environmental services that can help keep projects on-time and on-budget.

We have built a reputation for excellence delivering professional services including mining, civil, and environmental engineering; National Environmental Policy Act (NEPA) compliance; natural resource management; wastewater permitting; noise and air quality investigations; hazardous waste management investigations and remedial design; industrial hygiene studies; archaeology and cultural resources; Geographic Information Systems (GIS); and water, wastewater, and remediation treatment systems.”