Tri-State Design and Development, with our comprehensive experience, is capable of interjecting new perspectives, developing fresh ideas, and viable alternatives to proposal challenges. Our simple approach to projects is based upon our:

  • ability and willingness to understand project needs
  • steadfastness to open and honest communication
  • proven capability to work as partners with our clients
  • determination in pursuing feasible, cost-effective solutions
  • ability to produce aggressive and uncompromising schedules

“Our mission is to provide complete consultancy”

Tri-State Design and Development, as a multi-discipline firm, is in an ideal position to meet the needs of our clients by offering an extensive range of engineering, planning and design services. We have the ability to provide superior expertise services on any multi-faceted project. We offer the following in-house transportation services:

  • Bridge Design and Inspection
  • Construction Inspection and Management
  • Bridge Analysis and Ratings
  • Transportation Planning and Design
  • Survey & Mapping
  • Mechanical & Electrical Engineering

and also provide these succeeding multi-functional engineering services:



  • Structural Design, Analysis, and Reports
  • Architectural Engineering Services
  • Comprehensive Planning
  • Entitlement/Permitting
  • Site Development
  • Surveying Services
  • Mechanical Engineering
  • Electrical Engineering
  • Industrial, Commercial, and Residential Building Designs
  • Lighting, HVAC, Plumbing, and Fire Protection System Designs
  • Building Inspections and Rehabilitation Design
  • Hydraulic Engineering and Design

Transportation Design

Tri-State Design and Development has been associated with Transportation Projects that have included highway planning and design, access roadway and parking lot design, bridge and approach road design, and construction inspection and management.

Our experience includes the following types of services:

  • Layout and design of highways
  • Design and reconstruction of roads and highways
  • Traffic engineering
  • Tunnel lighting upgrades
  • Shop drawing reviews
  • ROW plans
  • Stormwater drainage improvements
  • M&P of traffic
  • Construction phase services
  • Utility coordination
  • Construction management and inspection

Civil/Site Design

Tri-State Design and Development’s site department has the capacity to become involved in retail, educational, commercial, industrial, residential, and recreational developments involving numerous types of projects. Our team is capable of performing from inception through final design. We can obtain permits, be the liaison between client and governing boards, and clear all necessary approvals from the multitude of agencies involved in the process.

Our site design concept couples a framework between the site and program and includes these components:

  • site layout
  • storm and sanitary sewers
  • water retention and detention ponds
  • location of structure components
  • traffic (ped and vehicle) access and circulation
  • utility distribution
  • E&S control
  • grading and drainage

We work with our clients to ensure that the envisioned development is within its intended milieu and assist our clients to obtain all compliance permitting required by local, state, and federal agencies.

Design Build

We have experience in partnering on Design-Build teams. Experience has shown us that the services required for design build projects are delivered differently. To meet that challenge, we have instilled an integrated design process which combines disciplines working in isolation, but with controlled communication with the rest of the team. With the utilization of our construction professionals, we have learned that project design is everybody’s responsibility. We are an integrated team developed to meet project quality, cost, and schedule. Tri-State Design produces performance solutions rather than prescriptive solutions.

Tri-State Design and Development has adapted within our bridge design activities when we are required to meet accelerated construction schedules.

Mechanical & Electrical Engineering

Tri-State Design and Development’s mechanical engineering team is composed of talented engineers, designers, and detailers experienced in mechanical building design, renovation, and rehabilitation.

We recognize the importance of design facilities in communication with other disciplines to eliminate multiple systems trying to occupy the same space and driving construction costs higher to resolve those issues. We ensure that those conditions do not exist.

Our mechanical design services include:

  • Plumbing
  • HVAC
  • Energy conservation and studies
  • Fire protection systems
  • Ventilation and exhaust systems
  • Process piping


Tri-State Design and Development also provides an engineering staff experienced with the design of new retail, municipal, commercial, industrial, and institutional facilities, control systems, interior and exterior lighting, and security and fire alarm systems for our clients.

We have the capabilities of providing all related electrical system design components to meet the needs of current and future customers.

Our MEP engineering team works within a Think Green Envelope to ensure successful projects for our clients.

Waterfront Structures


Tri-State Design and Development has performed numerous project designs for the United States Army Corps of Engineers, Pittsburgh District.

Our design efforts included:

  • design of miter gates
  • anchorage systems and components
  • in-depth inspections, analysis, rehabilitation recommendations for service bridges
  • sloped concrete erosion protection systems
  • designing new maintenance buildings
  • stability, reliability/risk assessments of waterway structures

Open-End Engineering and Environmental Services Contracts

As a prime consultant to PennDOT Districts 1-0 and 10-0, we performed various engineering and environmental services for a variety of transportation projects. Over a duration period of 30 months, we delivered diverse services for three different work orders for District 1-0 and eleven work orders for District 10-0. We coordinated the services of our geotechnical and environmental subconsultants. Tri-State was responsible for field survey; preliminary roadway design (Step 9); TS&L; traffic counts, analysis and signal design; preparation of H&H reports; E&S control plans and narratives, and ROW plans.

Several projects consisted of signal modernization and radii improvements at multiple locations. Tri-State performed the field surveys, peak hour traffic counts, traffic study analysis, signal optimizations, preparation of signal plans, and construction plans for radii improvements. As part of our study, we recommended restrictions on parking in two major CBDs.

Other projects consisted of preliminary roadway and replacement bridge design. Tri-State performed the field surveys, preliminary roadway and bridge designs, H&H reports including HEC II analysis, E&S control plans, and other related services. Services were performed in most counties within PennDOT Districts 1-0, 10-0, 11-0 and 12-0.

Survey & Mapping

Tri-State Design and Development’s survey staff has provided services to institutions, major corporations, governmental agencies and commercial operations. We use state-of-the-art equipment combined with our time-tested methods and procedures to accomplish the best possible results for our clients’ needs.


We have the capacity to do the following services:

  • aerial photography control
  • property surveys
  • boundary stakeouts
  • topographic detail surveys/mapping
  • construction stakeout
  • 1st and 2nd order precision surveys
  • preliminary engineering  design surveys

and can also perform the following surveying related tasks:

  • GPS Surveys & GIS Mapping
  • records researching for right of way, utilities, and property
  • developing boundary and subdivision survey maps
  • digital terrain modeling and contour mapping
  • County and State acquisition mapping
  • detailed topographic maps

Structural Engineering

Tri-State Design and Development has a structural engineering staff experienced in the inspection, analysis, rehabilitation and design of buildings, bridges, and special structures.

We have the capability of producing products associated with:

  • Office buildings
  • Parking garages
  • Garage modernization rehabilitation
  • Commercial and retail buildings
  • Vehicle maintenance facilities
  • Institutional, school, and hospital facilities
  • Recreational facilities
  • Residential buildings

Construction Management and Inspection

Our Construction Inspection services include Construction Inspection / Management for a variety of Highway, Bridge, and Building Projects. These services have been provided for the Pennsylvania Department of Transportation, Pennsylvania Turnpike Commission, Allegheny County Department of Public Works, Port Authority Transit of Allegheny County, Allegheny County Airport Authority, and the City of Pittsburgh. We possess technical and personnel resources to offer these services. Our employees are highly qualified and experienced with standards and procedures.

As a part of our CM Services, we provide independent design reviews, constructability reviews, cost evaluations, and value engineering.

Our construction inspection personnel include inspectors with NICET, NECEPT, CDS, ACI, and other relevant certifications and experience in roadway, bridge, and building construction, and painting inspection. Our inspection staff is kept current on all aspects of construction inspection and safety by training and certifications. Their efforts are managed and supervised by a former Assistant Construction Engineer with PennDOT with 40 years of experience.


Bridge Design and Inspection

Tri-State Design and Development, as a Prime and Sub Consultant, has designed, inspected and rehabilitated bridges of multiple  types, sizes, and levels of complexity for local, state and federal governmental agencies, such as PennDOT, PA Turnpike Commission, DGS, Allegheny County DPW, Allegheny County Airport Authority, Port Authority of Allegheny County, City of Pittsburgh DPW, USACE/Pittsburgh,  and developers.

Since 1983, we have been involved with the inspection, analysis, and design of long span structures, steel girder bridges, simple span and continuous plate girder bridges, concrete spandrel, steel and masonry arch bridges, rigid frame structures, prestressed concrete beam structures, as well as a great variety of smaller bridge configurations.

Our bridge designs and related services have won us outstanding project awards and recognition from our professional peer organizations.