Terracon's Pittsburgh office

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.

Skelly & Loy a Terracon company logo

Founded in 1969, S&L has 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. S&L’s 150 employees serve clients from offices in Harrisburg, Pittsburgh, and State College, Pa.; Hagerstown and Baltimore Metro, Md.; and Morgantown, W.Va.

We help meet our clients’ needs by working closely with them throughout the project, which combines our expertise with the insight of our clients to help us meet and exceed their expectations.

Environmental Services

  • 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)
  • Water, Wastewater, and Remediation Treatment Systems



3280 William Pitt Way Pittsburgh, PA 15238
Phone: (412) 828 1412
Fax: (412) 828 1475