 Rueter–Hess Reservoir is an off-stream reservoir which requires pumping surface water from nearby Cherry Creek, return flows from PWSD and other water districts.Additionally there are minor natural flows from Newlin Gulch above the reservoir.Cherry Creek water is obtained from a diversion dam (39°28'21.9"N 104°46'06.1"W), large wet well, and pumping station (39°28'21.1"N 104°46'10.6"W), all located on Cherry Creek just south of Stroh Road and adjacent to the Cherry Creek Regional Trail in Parker, CO.