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      • Signature Projects
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      • Decommissioning
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Transportation Market Services

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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
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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


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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