Underground TL 47 Borings
CHA performed engineering and survey services to install a new underground electric 69kV transmission cable in PVC conduits within steel casings between two existing substations along an approximately 5-mile route in Norwood, New Jersey. CHA was responsible for designing the underground electric line at four crossings that included three streams and a single set of existing railroad tracks. CHA designed the trenchless installation of the new line using a jack and boring to cross the obstructions. Each jack/bore design alignment also considered the surrounding community and included a limited workspace for construction to reduce impacts to nearby businesses, traffic, and railroad tracks. CHA also provided permitting assistance with the owner of the railroad line.
Project Services:
- Jack and bore design and construction documents for each crossing
- Geotechnical engineering and boring services for eight (8) borings at the crossings
- Geotechnical report and design criteria based on boring log information obtained
- Sheeting and shoring design at each of the crossings
- Topographic survey and basemap plans of the entire route between substations
- Civil plan and profile drawing creation along the entire route
- Environmental testing and disposal of removed soil cuttings from drilling operations
- Electrical engineering
- Cable ampacity study
- Cable spacer design
- Grout specification
- Construction administration
- Preparation of bid documents
- Periodic construction observation
- Assistance to the client for contractor RFIs
- As-built drawing documentation