Pennsylvania-New Jersey Interconnection Bushkill to Roseland Transmission Line, From Roseland Borough, Essex County, through Morris County and Sussex County to Hardwick Township, Warren County, Roseland, Essex County, NJ

Significance: The creation of the 210-mile-long transmission line known as the Pennsylvania-New Jersey Interconnection (PNJ) was a significant step in the extension of efficient and reliable electrical supply to Pennsylvania and New Jersey and balanced the service needs of the region's rural, industrial, urban, and suburban areas. The contractual interconnection of the electric systems of three major utility companies Philadelphia Electric Company (PECO), Public Service Electric & Gas Company (PSE&G), and Pennsylvania Power and Light Company (PP&L) - benefited all three by supplying sufficient energy during peak periods. During the early twentieth century, electrical demand from both domestic and industrial users was increasing. The PNJ enabled the three utilities to adapt to market changes, including shifting consumer populations.

In 1929 the Bushkill to Roseland Transmission Line, one segment of the PNJ in northern New Jersey, received the industry's top award, the General Electric Company's Charles A. Coffin Award, for innovative design and technical achievements. The PNJ's construction resulted in advances in the standard design of transmission lines and towers to improve resistance to environmental stresses. A system of standardization was also implemented whereby the transmission towers could be more efficiently customized for each location. Challenges posed by the terrain, which included swamps, mountains, rocks, ravines, and fields, required innovative construction techniques and solutions.
Unprocessed Field note material exists for this structure: N1513
Survey number: HAER NJ-149
Building/structure dates: 1927-1932 Initial Construction
Building/structure dates: 1959 Subsequent Work
Building/structure dates: 1965 Subsequent Work
Building/structure dates: 1972 Subsequent Work