In addition to the Highway Design, Bridge Design, and Construction Management/Inspection Projects, Tri-State Design and Development has also been associated…
Tri-State Design and Development’s team of professionals has the construction management and inspection staff to carry out the clients’ needs…
SR 1005, Section 002, Beaver County, PennDOT District 11-0 This project involved the replacement of a narrow 2-lane, 200’ span…
As a prime consultant to PennDOT Districts 1-0 and 10-0, we performed various engineering and environmental services for a variety…
Tri-State Design has substantial bridge safety inspection experience, including the inspection of over 300 state-owned bridges within various counties within…
This project consisted of the replacement design for a group of 4 minor bridges within Allegheny County, with a combined…
Tri-State Design was engaged to design the replacement of an existing, deteriorated, six-span bridge and its approach roadways. The project included…
Tri-State was responsible for the design for the referenced two dual structures. The design alternatives were for a 3-span continuous…
This project consisted of the replacement of an existing 138’, 3-span bridge with approach roadways. As a result of the…
This project involved the rehabilitation of an 8-mile portion of a 4-lane divided highway (I-79, Section A4). Tri-State was responsible…