It is a two-story Richardsonian Romanesque structure, with its first floor finished in stone and its second in brick. Brownstone trim is used on the windows and corner quoins, and the voussoirs which form the arches on the first floor. There are pipes to the reservoir and down to Chestnut Hill, and gates for controlling access to local the distribution network. The building was taken out of service in the 1950s.[2]
The reservoir and gatehouse were listed on the National Register of Historic Places in 1990.[1] In 2013, the town acquired the property from the state, and has since converted it into a public park, filling in the reservoir. The gatehouse survives, and there is interpretive signage explaining the historical use of the property.[3]