An option to trenchless construction

摘要

This is the story of how public agencies can collaborate to resolve environmental challenges in ways that are acceptable-and cost-effective-for both. The Pennsylvania DOT (PennDOT) is adding two lanes to four miles of state highway in Northampton County, a stretch that includes a bridge over Saucon Creek in the City of Bethlehem. Widening the bridge required more than 900 lineal feet of city-owned sanitary sewer to be relocated. The plan was to bury 48-inch steel carrier pipe beneath the creek bed and run the 30-inch sewer pipe through it. However, the creek is considered a high-quality watershed and home to native species of trout. Construction calendar restrictions for spawning had to be observed.