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The project involved the construction of two new observation wells; one in the Bluewater Designated Storage Area (DSA) and one in the Mandaumin DSA. DSAs are areas of land designated by the Ontario Energy Board (OEB) under Section 36.1 (1) (a) of the OEB Act, which contain geological formations used for underground storage of natural gas.

The observation wells constructed for this project will be used to monitor the gas content and pressure in these underground storage formations and help ensure the continued safe and reliable operation of Enbridge Gas storage facilities.

The Bluewater and Mandaumin well drilling sites are located within 2 km of one another. The Bluewater site is approximately 900 m west of the intersection of Mandaumin Road and Churchill Line in the City of Sarnia, and the Mandaumin site is approximately 1,300 m northeast of the intersection of Mandaumin Road and Churchill Line in the Town of Plympton-Wyoming.

Project activities at the Bluewater and Mandaumin drilling sites included the construction of a temporary gravel drilling pad measuring up to 80 m by 100 m. Upon completion of drilling activities, a permanent gravel pad measuring 8 m by 8 m was installed around the wells.

Access to the Bluewater site requires a new permanent access road 5 m wide by roughly 300 m long, and access to the Mandaumin site also requires a new permanent access road, measuring 5 m wide and approximately 500 m long.

Project status/timeline

  • Feasibility


  • Environmental studies


  • Regulatory review


  • Regulatory approval


  • Under construction


  • In-service


Project status/timeline

  • Feasibility


  • Environmental studies


  • Regulatory review


  • Regulatory approval


  • Under construction


  • In-service