ConEd Bronx Border to HP Pipeline

Consolidated Edison of New York (ConEd) required engineering design as part of a design-build effort with their construction contractor for the installation of a new 36-inch steel transmission gas pipeline within Bronxwood Avenue, extending from the intersection of Adee Avenue (the terminus of a previous phase of the project) and terminating 50 feet north of the intersection with Pelham Parkway North, approximately 4,200 feet, along a City of New York controlled street. CHA performed the initial site survey to gather existing condition data, establish horizontal and vertical control, and provide a base map of the proposed route. Additionally, all test pits were surveyed to show test pit sketches along with plan and profile views. Based on that information and utility research and coordination with the design-build contractor and ConEd, CHA was able to provide engineered plans to construct the new main. There were two tie locations: one at the south and one at the end of the proposed route, both tying into new 36-inch transmission mains. The challenges of this project included:

  • Determination of the most cost-effective and efficient installation alignment to avoid existing underground utilities
  • Maintaining required clearances from existing utilities, such as UG gas services, sanitary sewer piping, sewer laterals, water mains, and UG electrical
  • Minimizing the number of elbows required to keep construction costs down
  • Keeping alignment within a single lane width of the existing street to reduce traffic impacts
  • Protecting existing utilities
  • Maintaining the project schedule
  • Ensuring all ConEd specifications and engineering guidelines were met
Project Services:
  • Survey
  • Engineering Design