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Esri Proceedings

2009 Petroleum User Group Conference

PIP—Pipelines

Field Verification of Gas Pipeline HCAs

View Presentation [PDF]

John Linehan, GISP; Enbridge Energy Company

Federal regulations require natural gas transmission pipeline operators identify high consequence areas for integrity management. Once identified, the pipeline must be periodically assessed and mediated if faults are found. Assessments cost money and the main question an operator has is “Do I really need to assess this section of pipe?” The answer lies in the validity of the HCA. This paper will discuss several methods to discover and validate high consequence areas and associated identified sites.

  1. Using online aerial imagery
  2. GPS surveys—method, data collected, data dictionary, ArcPAD/ArcMobil tools
  3. Line Location methods—In line inspections, construction reports, as-builts
  4. Field Surveys—drive-by, local authority consults
  5. Photographs and Forms
  6. Identifying and digitizing structures
  7. Identifying and digitizing high consequence areas
  8. Calculating HCA’s
  9. Annual HCA comparison and reporting

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