Front view of the Gatehouse at the Brookline Reservoir. Built 1847-48, the Gatehouse of the Cochituate Aqueduct is equipped with the oldest wrought iron roof in the United States, the oldest cast iron staircases intended for public use in the U.S.. It is the oldest extant public water supply aqueduct principal gatehouse in the U.S., being connected to the second municipal aqueduct constructed in this country. Visitors to the reservoir would pass through the Gatehouse to access the path around the water. The Sportsmen's Club of Brookline occupied the building from 1952 through the 1960s. Charles Edward Parker, Architect.