sentences:  It is the smallest of the five Ruhr reservoirs.It holds up to 1.42 million m³ of water and powers a hydroelectric power plant with a maximum output of 5.3 MW, built for and operated by RWE.Kettwig is situated near the Bundesautobahn 52 motorway, which connects the borough to other parts of Essen and to Düsseldorf as well as to the national autobahn grid.