TPD’s Structural Services Department has demonstrated success in delivering a range of structure projects for construction, including bridge superstructures and substructures, bridge construction, culverts, retaining walls, and noise walls. Our inspectors work in accordance with the National Bridge Inspection Standards (NBIS).


We employ an experienced team of structural engineers, designers, and technicians who understand all facets of bridge design.

Bridge superstructures & substructures
– Bridge construction
– Culverts
– Retaining walls
– Noise walls


TPD’s inspectors are certified and experienced in providing inspections for the following structures:

Historic steel trusses
– Prestressed beam bridges
– Steel beam bridges
– Historic wooden covered bridges
– Concrete and steel culverts

Masonry and concrete arches
– Confined space pipes
– Sign structures
– Wall inspection


Departments of transportation
– Toll commissions / authorities
– Municipalities
– Counties
– Transit authorities
– Non-profit agencies


Nearly all of TPD’s inspectors are Professional
Engineers (PE) or Engineers-in-Training (EIT).
– All of our inspectors are PennDOT Certified
Bridge Safety Inspectors (CBSI).

PennDOT District 8-0

Service(s): Bridge Design
Client(s): PennDOT District 8-0

Upper Uwchlan Township, Chester County, PA

Service(s): Bridge Design
Client(s): PA Turnpike Commission

Philadelphia, PA

Service(s): Construction Management Inspection Services
Client(s): PennDOT District 6-0