Upper Peirce Reservoir

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Upper Peirce Reservoir
Coordinates 1°22′03″N 103°48′07″E / 1.36750°N 103.80194°E / 1.36750; 103.80194Coordinates: 1°22′03″N 103°48′07″E / 1.36750°N 103.80194°E / 1.36750; 103.80194
Type reservoir
Primary inflows Kallang River
Primary outflows Kallang River
Basin countries Singapore
Surface area 304 ha (750 acres)

Upper Peirce Reservoir (Chinese: 贝雅士蓄水池上段) is Singapore's fourth reservoir. The 6-hectare Upper Peirce Reservoir Park overlooks the Upper Peirce Reservoir.


Originally known as the Kalang River Reservoir, Singapore's second reservoir was impounded across the lower reaches of the Kalang River in 1910. 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 late 1960s, due to increasing demand for water and the need to increase the capacity of Peirce Reservoir, a higher dam was constructed upstream of the existing dam at Peirce Reservoir in 1970.

In 1975, a major water supply project to develop new water resources was undertaken to support Singapore's rapid housing and industrialisation programmes. A dam was constructed at the upper reaches of the Peirce Reservoir, forming the Upper and Lower Peirce Reservoirs.

Upper Peirce Reservoir was officially opened by then Prime Minister Lee Kuan Yew on 27 February 1977. The fourth and largest reservoir of Singapore has a capacity of 27.8 million m3 of water over 304 hectares of water surface.


Today the Upper Peirce Reservoir Park is a popular retreat with visitors who enjoy its unique pleasant setting and tranquillity. Adding to its scenic beauty is the surrounding secondary forest which was protected as a water catchment area when the reservoir was built.

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