Peirce Reservoir, originally named the Kalang River Reservoir, is Singapore's second reservoir.  In 1922, it was renamed Peirce Reservoir in commendation of the services of Robert Peirce, who was the municipal engineer of Singapore from 1901 to 1916. In 1975, a dam was constructed at the upper reaches of the Peirce Reservoir, forming the Upper and Lower Peirce Reservoirs. The Upper and Lower Peirce Reservoir Park are popular places with their unique pleasant setting and tranquility. Adding to the scenic beauty is the surrounding secondary forest which was protected as a water catchment area when the reservoir was built.