Main Pass Block 252 to South Pass Block 55

Viosca Knoll Gathering System

The Viosca Knoll Gathering System (VKGS) consists of 94 miles of 20-inch pipe from Main Pass Block 252 to South Pass Block 55 and 6 miles of 16-inch pipe from Viosca Knoll Block 817 to Main Pass Block 289. The facilities include three meter stations, three pig launchers/receivers, a deck extension and miscellaneous platform piping. Water depths range from 260 to 675 feet of water along the pipeline route.

PCS SCOPE OF WORK

Project Consulting Services®, Inc. (PCS) was selected to provide services for permitting, design, procurement and project management from project inception through completion. The significant services provided were:

• Prepared detailed cost estimates
• Completed pipeline design, including, but not limited to, riser and subsea tie-ins, pipeline crossings, pipeline span analysis and design
• Handled all regulatory permitting and notifications
• Coordinated and managed site hazard surveys and pipeline route surveys
• Provided on-site inspection services during hazard and pipeline route survey work
• Identified, specified and requisitioned materials, including pipe, coatings, valves, equipment and provided vendor surveillance
• Provided design and construction management of platform piping
• Acted as liaison with third party contractors
• Coordinated and managed site hazard surveys and pipeline route surveys
• Assisted in detailed evaluation of all installation contractor bids and equipment
• Reviewed and approved contractor installation procedures, third party subcontractors and welding procedures
• Developed all AFC drawings
• Executed on-site project management and inspection
• The South Pass Block 55 riser tie-in provided a unique challenge due to external forces generated by mudflows in this area.