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Lessons Learned from Pomerado Pipeline 4 Rehabilitation
Pomerado Pipeline 4 rehabilitation was a fast track infrastructure project, which required the relining of approximately 26,000 linear feet of prestressed concrete cylinder pipe(PCCP) water main in a little over 238 calendar days. The rehabilitation consisted of relining the 69-inch and 84-inch inside diameter(ID) PCCP using a collapsed steel pipe, followed by welding, backfilling the annulus with grout, and cement mortar lining. Due to proximity to existing residential areas and other environmental restrictions along the pipeline alignment within the City of San Diego, the relining work was accomplished from 15 access portals, set 1,300 to 2,600 ft apart, requiring a specially built transporter for carrying the collapsed steel pipe inside the existing PCCP via the access portal. The specifications imposed stringent requirements on the material procurement, fabrication, installation, welding, and non-destructive testing of pipe. In addition, since a portion of the pipeline was located in close proximity to the residential area, the restrictions on the working hours for delivery, installation, and welding made the construction schedule even more challenging. This paper describes some of the lessons learned during the Pomerado pipeline rehabilitation, which can be successfully implemented for similar infrastructure projects.
Lessons Learned from Pomerado Pipeline 4 Rehabilitation
Pomerado Pipeline 4 rehabilitation was a fast track infrastructure project, which required the relining of approximately 26,000 linear feet of prestressed concrete cylinder pipe(PCCP) water main in a little over 238 calendar days. The rehabilitation consisted of relining the 69-inch and 84-inch inside diameter(ID) PCCP using a collapsed steel pipe, followed by welding, backfilling the annulus with grout, and cement mortar lining. Due to proximity to existing residential areas and other environmental restrictions along the pipeline alignment within the City of San Diego, the relining work was accomplished from 15 access portals, set 1,300 to 2,600 ft apart, requiring a specially built transporter for carrying the collapsed steel pipe inside the existing PCCP via the access portal. The specifications imposed stringent requirements on the material procurement, fabrication, installation, welding, and non-destructive testing of pipe. In addition, since a portion of the pipeline was located in close proximity to the residential area, the restrictions on the working hours for delivery, installation, and welding made the construction schedule even more challenging. This paper describes some of the lessons learned during the Pomerado pipeline rehabilitation, which can be successfully implemented for similar infrastructure projects.
Lessons Learned from Pomerado Pipeline 4 Rehabilitation
Hasan, Nausherwan (author)
International Pipelines Conference 2008 ; 2008 ; Atlanta, Georgia, United States
Pipelines 2008 ; 1-10
2008-07-17
Conference paper
Electronic Resource
English
California , Pipe materials , Infrastructure , Rehabilitation , Pipelines , Costs , Assets
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