One of the first state agencies in New England to initiate an earth retaining structure (ERS) program, the MBTA chose Collins to jumpstart this endeavor with compiling a systemwide ERS inventory.
The scope of services involved developing program guidance, creating an inventory item list and data collection spreadsheet, and providing all associated project management, planning, and coordination to complete desktop review and field work encompassing the inventory of earth retaining structures for Systemwide Transit and Commuter Lines. This encompasses five transit lines and twelve commuter lines. As part of this work, video and imagery data was collected by mounting high-resolution and 360-degree cameras to the front of locomotives during revenue hours. This data was used in conjunction with existing asset information to complete a desktop review and to develop a preliminary inventory of earth-retaining structures for MBTA, which was validated in the field using tablets.