Trust the Process: Great Lakes Water Authority’s Progressive Management Approach to Distressed Prestressed Concrete Cylinder Pipe
Publication: Pipelines 2024
ABSTRACT
The Great Lakes Water Authority (GLWA) owns and operates the 14 Mile Road Transmission Main, which was constructed between 1967 and 1973 with 42-in. to 54-in. diameter prestressed concrete cylinder pipe (PCCP). This transmission main extends approximately 11 mi, with 8 mi having no redundancy. Since its construction, the pipeline has failed on two occasions: October 23, 2017, and October 31, 2021. In 2019, a free-swimming electromagnetic in-line inspection tool was used to characterize the number and location of broken wire wraps (BWWs) in the PCCP. The inline inspection identified high levels of distress in a concentrated area near the crossing of the GLWA transmission main and a set of high-pressure steel gas pipelines. Subsequent field testing strongly suggested that stray current from the impressed current cathodic protection (CP) system on the gas pipelines contributed to the observed BWWs in the GLWA transmission main. Based on the results of these tests, renewal of this portion of the GLWA main was recommended by HDR Michigan, Inc. (Prime Engineer). An alternatives analysis was performed to determine the most favorable approach for renewal. Renewal operations using carbon fiber reinforced polymer (CFRP) lining per (American Water Works Association) AWWA C305 were completed in 2023 and the transmission main was returned to service. During the course of the repair, significant planning and coordination took place with the GLWA member partners to implement alternative water operations to meet demands.
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REFERENCES
AWWA (American Water Works Association). (2014). Manual of Water Supply Practices - M28, Third Edition, Rehabilitation of Water Mains, AWWA, Denver, CO.
AWWA (American Water Works Association). (2018). CFRP Renewal and Strengthening of Prestressed Concrete Cylinder Pipe (PCCP), Standard C305, AWWA, Denver, CO.
Ojdrovic, R. P., Nardini, P. D., and Zarghamee. (2011). Verification of PCCP Margin and Risk Curves, ASCE Pipelines 2011, ASCE, Reston VA.
NACE (NACE International). (2018). Measurement Techniques Related to Criteria for Cathodic Protection on Underground or Submerged Metallic Piping Systems, Association for Materials Protection and Performance, Houston, TX.
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Published online: Aug 30, 2024
ASCE Technical Topics:
- Composite materials
- Concrete cylinder pipes
- Concrete pipes
- Electric power
- Energy engineering
- Energy infrastructure
- Engineering materials (by type)
- Fiber reinforced composites
- Fiber reinforced polymer
- Gas pipelines
- Infrastructure
- Lifeline systems
- Materials engineering
- Pipeline management
- Pipeline systems
- Pipelines
- Pipes
- Polymer
- Power transmission
- Pressure pipes
- Synthetic materials
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