TransportationParsnip River Bridge Replacement

  • Client Name Effiage
  • Location British Columbia
  • Sector Transportation
  • Start Date 2017
  • End Date 2020

DWB consulting Services Ltd. (DWB) was retained by Eiffage to provide a variety environmental services for the replacement of the Parsnip River Bridge located approximately 155 km north of Prince George. The project area consisted of a 2-km section of Highway 97, including the Parsnip River Bridge, that began approximately 0.15 km south of Windy Point and continued on Highway 97 for approximately 2.09 km.

Prior to the start of construction, DWB developed a comprehensive Construction Environmental Management Plan (CEMP) to address environmental mitigation measures for works associated with construction of the new bridge, as well as demolition and removal of the old bridge, in accordance with the 2016 Ministry Standard Specifications (SS) for Highways Construction and an Environmental Management Plan (EMP) prepared by a secondary environmental consultant.

During construction DWB was retained by the contractor to provide the full suite of environmental monitoring which included environmental monitoring, fish salvages, water quality monitoring, spill response, bi-weekly reporting, and post-construction reporting. DWB supplied a full-time environmental monitor during the most environmentally sensitive stages of the project, such as instream works, pile driving, and concrete pouring. DWB also developed and implemented a hydroacoustic monitoring procedure for pile driving activities. For construction phases that were less environmentally sensitive, such as highway paving and earth works, a DWB environmental representative conducted bi-weekly inspections of the work site to ensure conditions in the EMP were being met. DWB also provided full-time environmental monitoring during the demolition of the old bridge after construction of the new bridge was complete in 2020. Prior to the start of bridge demolition, DWB developed an addendum to the CEMP that included a management plan to address containment and disposal of lead-containing paint chips on the superstructure of the old bridge. During bridge demolition, DWB environmental monitors assisted contractors with implementation of this plan to help contain and dispose of lead-containing waste material resulting from demolition activities.

Prior to the winter shutdown period in 2018, DWB developed a winter stabilization plan for the project to provide direction for Erosion and Sediment Control (ESC) implementation and monitoring in order to reduce the potential of sedimentation to the surrounding environment during the winter and spring prior to full time works resuming in spring 2019.

Environmental Services

  • Construction environmental management planning
  • Erosion and Sediment Control planning and management
  • Environmental Regulatory Permitting
  • Environmental Monitoring
  • Hydroacoustic monitoring
  • Contamination management for lead containing materials