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A sprayed-on structural coating enables rehabilitation of large stormwater pipes without traffic disruption and at major cost savings
There’s a word for traffic disruptions around Harrisburg, the Pennsylvania state capital: ugly. When two dual pipelines running deep beneath one of the area’s busiest arteries showed signs of deterioration, no one wanted to repair it by conventional dig-and-replace methods.Instead, the Pennsylvania Department o fTransportation (PennDOT) settled on a trenchless solution involving a spray-on structural coating. The job saved months of traffic disruption and an estimated $2.6million.
The historic Connecticut community of Norwalk is testing what appears to be an effective way to reduce non-point source pollution. Faced with having to meet state EPA requirements for total maximum daily loadings (TMDLs) for the Norwalk River and Long Island Sound, public works director Harold Alvord needed an economical, non-invasive yet effective method to manage stormwater system pollution.