Construction Inspection

/Construction Inspection

Massachusetts Turnpike Authority Bridge Inspections

DTC made bridge inspections a variety of structures in and near Boston associated with the Massachusetts Turnpike (I-90) and Interstate 93 (I-93).

Inspected items included:

Rolled steel stringers
Steel box girders
Concrete box girders
Tunnel ceilings
Tunnel lighting and overhead items

Structures were either part of a ramp/tunnel for the interstate highways or spanned over the highway roadways.  […]

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Rehabilitation of North Avenue Bridge

DTC performed the hydrologic and hydraulic evaluation as well as flood management certification for the North Avenue Bridge over the Aspetuck River in Westport, CT.

The project involved the design of the replacement superstructure for the existing, structurally deficient bridge.

The existing concrete abutment and wing walls were structurally sufficient to support the new superstructure resulting in […]

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Inspection and Rating of Systemwide Bridges Contract No. 2, Group B

DTC was selected a second time by the MBTA in 2009 to perform in-depth inspections and load ratings on commuter rail bridges located along the MBTA’s East Route, Dorchester, Old Colony, Fitchburg, and Worcester Lines.

DTC services include hands-on, in-depth, and fracture-critical inspections of bridges in accordance with NBIS, AREMA, AASHTO procedures.

Load ratings are performed using […]

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Inspection and Rating of Systemwide Bridges Contract No. 1, Group C

DTC provided in-depth, special member, and fracture critical inspection and load ratings of over 80 commuter rail bridge structures located along the MBTA’s Plymouth, Middleboro, Capeway, Franklin, Needham, Stoughton, and Shoreline Branches. This multiphase contract spanned over four years.

DTC provided hands-on critical inspections in accordance with NBIS, AREMA, and AASHTO standards. Structures inspected and load […]

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Lake Street Streetscape Improvements

DTC completed the design as well as the construction engineering and inspection of approximately ¼ mile of Lake Street from Madison Street to Veteran’s Memorial Drive in Harrison, New York.

The project involved widening the sidewalk and shifting Lake Street to the west.

Lake Street is presently a two-lane, two-way street with parking on the east side […]

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Conn DOT On-Call Environmental Compliance, Soil & Groundwater

DTC is one of three firms currently providing on-call technical environmental consulting services directly for the Connecticut Department of Transportation, Division of Environmental Compliance.

The services are provided to investigate and mitigate soil and groundwater contamination that may impact Connecticut Department of Transportation construction projects throughout the state. The work also includes environmental investigations and environmental […]

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Burton Street Drain Separation

DTC was awarded an on-call professional engineering services contract in 2006 (on-going) related to the Metropolitan District’s Clean Water Program for sewer separation and related collection system and/or drainage system projects for the MDC.

The Metropolitan District is undertaking one of its largest capital projects program in its history. To comply with a Federal Consent Decree […]

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Tower Avenue South

DTC performed civil engineering services under the Metropolitan District’s Clean Water Project with the goal of reducing combined sewer overflows. DTC’s assignment, known as the Tower Avenue South Sewer Separation Area included approximately one mile of Cleveland Avenue and Main Street in Hartford, Connecticut.

The project design scope included the following tasks:

Evaluating hydraulic performance, cost […]

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