For many years, environmental activists and historic preservationists had pushed for nomination of the Ridgewood Reservoir to the National Register of Historic Places. An application was completed by NYC H2O in 2017 and the New York State Office of Historic Preservation added the reservoir to the register early in 2018. Our organization was then the recipient of a grant from the William C. Pomeroy Foundation to fund a historic marker, and with the assistance of the NYC Department of Parks & Recreation, it was placed next to the steps heading up to the main reservoir path in early December.