Transportation Market Services

Investigations & Inspection

NTH provides transportation clients with expertise in investigating and inspecting existing conditions in support of maintenance, rehabilitation, and construction of transportation infrastructure.

• Geotechnical Investigations – Characterization of subsurface conditions for support of structures and slopes
• Subsurface Utility Engineering – Accurate depiction of existing utility networks in support of subsurface construction
• Bridge and Other Structure Scoping & Inspection – Identification of structural deficiencies to maintain serviceability
• Environmental Contamination (PACS & PSI) – Identification of potential environmentally impacted sites and field sampling/testing to quantify
• Wetland Assessment – Delineate existing wetlands in support of project permitting

Design

NTH provides transportation clients with safe and efficient infrastructure designs to support their network. 

• Foundations and Slopes – Deep and shallow foundation elements as well as slopes
• Bridges and Other Structure – Structural design and rehabilitation
• Roadway and Streetscape – Geometrics, layout, and accessibility
• Pavements – Management and design of rehabilitation and reconstruction
• Municipal Utilities – Water/wastewater rehabilitation and replacement
• Hydraulics – Site and water management

Construction

NTH provides transportation clients with construction support to ensure that projects are built as designed and specified.
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• Engineering – Management of contractors and work records
• Inspection – Observation and confirmation of construction
• Testing – Material and placement approval
• As-Built – Documentation of constructed conditions