Citation

Am. City Cty. 1998; 113(10): 42.

Copyright

(Copyright © 1998, Penton Media)

DOI

unavailable

PMID

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Abstract

Pawtucket, Rhode Island, was faced with a challenging problem when videos showed significant cracks running along the crown of the 24-in (61-cm) sewer line that runs directly below the highway. The pipe had become so badly deformed that its vertical diameter had shrunk to just 18 in (46 cm) in some places. To further complicate matters, inspectors found that a 15-in (38-cm) plastic pipe, placed inside one section of the deformed sewer in an earlier repair effort, was also cracked. Engineers concluded that the 120-ft (37-m) length of 15-in (38-cm) plastic pipe would need to be repaired using open cut construction. For the remainder of the damaged pipe, however, they recommended a cured-in-place repair method that could be accomplished without digging up the four-lane road and disrupting traffic in the area. On a per-foot basis, the low bid for the open cut repairs was more than 13 times that of the low bid for cured-in-place repairs. Video inspections of the finished product confirmed the project's success.