Plover Cove Reservoir, located within Plover Cove Country Park, in the northeastern New Territories, is the largest reservoir in Hong Kong by surface areas, and the second-largest by volume. It is the world's first freshwater coastal lake constructed from an arm of the ocean. Its main dam, which disconnected Plover Cove from the sea, was one of the largest in the world at the time of its construction.
History
thumb|Service Dam for Plover Cove Reservoir (Northern one on the right, Southern one on the left.)
Planning
Hong Kong lacks significant natural inland water bodies, and providing water supply to the territory's population has long been fraught with problems. On 24 July 1958, an official spokesman stated that government engineers were studying the idea of converting sea inlets into freshwater lakes, citing Plover Cove as one of the foremost areas under consideration. The plan was considered feasible as the cove was mostly enclosed on three sides, and could be fully cut off from the sea by damming sections of the Tolo Harbour that were known to be very shallow.
The government hired the engineering consultancy Binnie, Deacon and Gourley to undertake a preliminary investigation. In mid-1959 the engineers delivered a report confirming the feasibility of the plan and laying out the basic arrangement of the proposed dams. They estimated that construction would cost about HK$348 million, plus approximately $60 million for the associated water distribution network.
Construction
One main dam and three service dams were built to shut the cove off from the sea. The cove was then drained and converted into a freshwater lake.
Construction work commenced in 1960 and was completed in 1968, providing a capacity of 170 million m<sup>3</sup>. Work on raising the height of the dams began in 1970. Upon completion in 1973, the reservoir capacity was increased to 230 million m<sup>3</sup>.
The dam of the reservoir is 28 metres tall
The reservoir today
Plover Cove Reservoir supports a diverse wildlife, including many freshwater fish species.