There's a lot of development going on around Lehigh Valley International Airport in Allentown, Pa. That means impervious surfaces are also on the rise.

To keep rain from drowning a public park in nearby Bethlehem, Pa., the Hanover Township Public Works Department decided to reconstruct the park's stormwater infrastructure.

Concerned about his crews taking on such a large project all by themselves, Public Works Director Vince Milite contacted Oldcastle Precast-Mid-Atlantic looking for ideas. By joining forces, they designed a solution that relies on reinforced concrete pipe (RCP):

  • 48 feet of 48-inch, Class 3, RCP (three 16-foot spans, side-by-side)
  • Six, 48-inch flared end sections (one on each end of a row)
  • Three bell end sections (for downstream), and
  • Three spigot ends (for upstream).

Oldcastle Precast, which designed a similar solution for a combined sewer outfall in Philadelphia, provided engineering design support. The company manufactured the 48-inch pipe at its Croydon, Pa., facility and the 48-inch flared end sections at its Folsom, N.J., facility.

“The precast drainage solution worked very well," said Ed Pentecost, sales manager at Oldcastle Precast. "Before, water backed up on the upper fields, where they had smaller drainage pipes. By using the triple-cell 48-inch line and flared end sections, the runoff flows out of the upper area into the lower region of the community park. Moreover, compared to casting in place, digging a hole and placing RCP was easier, quicker, and more efficient.”

“The project turned out great,” said Milite. “We're very happy with the entire process and outcome.”