CH2M HILL Energy Canada, Ltd.
February 2019
Executive Summary:
The Pipeline Abandonment Research Steering Committee (PARSC) through the Petroleum Technology Alliance of Canada commissioned CH2M HILL Energy Canada, Ltd. (CH2M), Decom Consulting Ltd., and Allnorth Consultants Limited (Allnorth) to conduct a review of a previous pipeline abandonment program, which involved a surface assessment of three 34-inch-diameter (836.6-millimetre outside diameter) pipeline segments of the Enbridge Pipelines Inc. (Enbridge) Line 3 pipeline (the Project), abandoned between 1978 and 1980. The pipeline segments are colocated with other operating pipelines within the Enbridge Mainline right-of-way (ROW), to the immediate east of the City of Edmonton. The pipeline segments were both areas where the abandoned pipeline segment was removed and where the pipeline was abandoned in place. Segments of the pipeline that were abandoned in place were capped, filled with inert gas pressure, and had cathodic protection maintained in accordance with Section 121 of the Oil and Pipeline Regulations, SOR/78-746, September 28, 1978.
The objective of the Project is to review the condition of a medium-diameter pipeline that was abandoned more than 10 years ago, and to evaluate the outcomes achieved by the pipeline abandonment program. To evaluate the outcomes of the pipeline abandonment program, the following tasks were completed: