had major investors from Phoenix, San Francisco, and Hamilton, Ohio. The Arizona Improvement Company was then developing the town of Ingleside by the falls and planting the first commercial citrus orchards. A mill was constructed at the falls around the same time. Electric plant The first plant was built in 1901–02 by the Phoenix Light and Fuel Company, the predecessor to Arizona Public Service, to provide electricity to Phoenix. In 1907, it was reported that electricity for Phoenix would be generated at Roosevelt Dam instead and power from the Arizona Falls plant would supply farmers in the immediate area. By 1909, engineers of the Salt River Project (SRP), the operator of the canal system (originally the Salt River Valley Water Users' Association), decided to take over operation of the Arizona Falls power station and replace the generating equipment, increasing capacity by a third, to 700 hp. The plant was completely rebuilt beginning in 1911. SRP hoped that it could realize savings by ordering additional 48-inch turbines that were being built by S. Morgan Smith of York, Pennsylvania for the Granite Reef Dam power station. Engineers determined they would not work satisfactorily at Arizona Falls which has a much smaller drop. A separate specification was issued and a contract for two 745-hp turbines was issued to S. Morgan Smith later in the year at a cost of $11,500. Two 535-kVA 25-Hz generators were purchased from General Electric for $15,462, and Westinghouse Electric furnished other equipment for $2,925. Also purchased were two 30-kW transformers and two cranes. The generators were the largest pieces of machinery ever "imported" into the Phoenix area at the time. The powerhouse building was about . A concrete wasteway diverted water back into the canal when the turbines were not operating. A spillway returned water to the canal that had passed through the turbines. Both structures were built with of concrete. The spillway was of a unique compact design that used a siphon that could be constructed less expensively than a longer gravity channel. A four-room cottage was built as a residence for the plant's operator at a cost of $2,151. Construction was completed in the spring of 1913 with final testing of the generating equipment occurring at the end of May. The first customer was a nearby cement plant. After the plant, which covered up the falls, was constructed, its roof doubled as a dance floor, often