To increase water supply and pressure to its customers in Portland, Deering, South Portland, and Cape Elizabeth, the newly formed Portland Water District (who acquired the Portland Water Company in 1908), decided to construct a new transmission line from Sebago Lake to Portland using 42 inch cast iron pipes.

This photo (location unknown) depicts some of the workers on the construction of transmission main as well as the excavating and pipe laying equipment used. The project was completed in 1912.