TPD’s has provided Environmental services for public and private sector clients related to transportation engineering projects since its inception in 1989. TPD is capable of performing studies for a wide variety of environmental projects ranging from simple noise studies to wetland delineations to complex Environmental Impact Statement (EIS) projects.


TPD personnel have completed a wide range of environmental projects in the following discipline areas:

Stream / wetland delineation and mitigation – Macroinvertebrate studies – Threatened and endangered species studies – Waterway permitting – Erosion & sedimentation control design – CPESC inspection services – NPDES permitting – Noise modeling / monitoring

– NEPA documentation
– Phase 1 environmental site assessments
– Due diligence screenings
– Qualitative air quality assessment
– Public involvement and community outreach
– Agricultural lands assessment
– Section 4(f) and section 6(f) coordination
– Natural resources inventories


We are prepared to provide environmental services for almost any transportation project, trail project, wetland or stream restoration project, including but not limited to:

Highway design – Bridge design – Trail design – Stream and wetland restoration

– Stream and wetland monitoring
– Land development
– Signal projects
– Highway occupancy permitting (HOP) projects


Our team of environmental specialists have experience with the following federal, state, and local agencies.

Pennsylvania Department of Conservation and Natural Resources (DCNR) – U.S. Environmental Protection Agency (EPA) – U.S. Department of the Army, Corps of Engineers (USACE) – National Resources Conservation Service (NRCS) – U.S. Fish & Wildlife Service (USFWS) – National Park Service (NPS)

– Federal Aviation Administration (FAA)
– County Conservation Districts
– Southeastern Pennsylvania Transportation Authority (SEPTA)
– Pennsylvania Historical and Museum Commission (PHMC)
– Pennsylvania Department of Environmental Protection (PADEP)


– Counties
– Departments of transportation
– Toll commissions / authorities
– Private land developers


Certified Professional in Erosion and Pollution Control (CPESC)
– Noise Certification
– Rosgen Certification Level III

Limerick Township, Montgomery County, PA

Service(s): Highway Design. Construction Management and Inspection Services, Traffic Signal & ITS Systems Design & Environmental Services & Permitting
Client(s): Limerick Township

Frackville Borough to St. Clair Borough, Schuylkill County, PA

Service(s): Highway Design & Environmental Services & Permitting
Client(s): PennDOT District 5-0