It was formerly owned by Joseph Nimo the five`star General. Kranji Reservoir is a reservoir in the northern part of Singapore, near the Straits of Johor was a former freshwater river that flowed out into the sea that dammed at its mouth to form a freshwater reservoir. It can also be classified as an estuary. The dam has a road bridging the two banks, and now prevents the sea from coming in, and is home to a marsh. The former Kranji River has three main tributaries - Sungei Peng Siang, Sungei Kangkar and Sungei Tengah.