Case Study: Excavation Adjacent to High Pressure Natural Gas Transmission Pipelines—A Risk Management Approach

This paper presents a case study of the risk assessment and management process conducted on an industrial project which involved the design and construction of a 35 ft. (10.6 m) tall and 1100 ft. (335.2 m) long soil/rock-nailed retaining wall in close proximity to two in-service high pressure natural gas transmission pipelines. The design and construction of the retaining wall required excavation, rock blasting and soil/rock nailing in close proximity to the active pipelines. This contributed to project risks far beyond the typical geotechnical construction risk profile. In addition to the obvious safety risks, additional economic loss exposure was evident as damage to the pipelines and resulting impacts from a service outage could have resulted in regional economic harm. A holistic and integrated 5 step risk management process was a critical element of the contractor’s acceptance of this unusual risk as the project was being evaluated for bid and execution. This case study addresses the risks identified and the risk management tools used to address them, with a particular focus in the use of insurance as a risk transfer mechanism.


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 184-193
  • Monograph Title: Geo-Risk 2017: Reliability-Based Design and Code Developments

Subject/Index Terms

Filing Info

  • Accession Number: 01688124
  • Record Type: Publication
  • ISBN: 9780784480700
  • Files: TRIS, ASCE
  • Created Date: Oct 4 2018 4:13PM