This is a list of reservoirs on Jersey. Jersey Water operate six main reservoirs, with an additional two reservoirs for untreated water that can be pumped between the other reservoirs. Raw water can be stored at Mont Gavey and Augres Treatment Works, with treated water being able to be stored at Augres, Handois, Les Platons, and Westmount.[1] The two water treatment works on the island can process a maximum daily capacity of 46,000,000 litres (10,000,000impgal; 12,000,000USgal) of water daily (28,000,000 litres (6,200,000impgal; 7,400,000USgal) at Handois, and 18,000,000 litres (4,000,000impgal; 4,800,000USgal) at Augres).[2]
Reservoirs on the Island of Jersey
Security of water supply on the island has led to investigations into increasing the amount of water available; when at peak capacity, the combined amount of water in the six reservoirs would supply enough water for Jersey for 120 days.[3] One option mooted is to expand Val de la Mare Reservoir, or use parts of the worked out Gigoulande Quarry as a seventh reservoir.[4] A further option of a seventh reservoir is in the Mourier Valley on the north-western side of the island.[5] The six main reservoirs listed fall under Reservoir (Jersey) Law 1996.[6]
The middle reservoir in the Waterworks Valley (the upper reservoir being Handois, and the lower one Millbrook). The term waterworks relates to when the stream through the valley powered several watermills before the age of steam.
The dam wall is constructed from a rock-filled embankment with a bitumnous concrete core. The reservoir was first proposed in 1975, and flooded Queens Valley. The only private dwelling to have the occupants forcibly evicted from, was also the building used as the home for the fictional detective Jim Bergerac.
Howard, Jonathan (December 2011). "Val De La Mare dam, Jersey: design and installation of a geomembrane lining". Dams and Reservoirs. 21 (4): 159. doi:10.1680/dare.2011.21.4.159.
Cole, Rg; Horswill, P (December 1988). "ALKALI-SILICA REACTION: VAL DE LA MARE DAM, JERSEY, CASE HISTORY". Proceedings of the Institution of Civil Engineers. 84 (6): 1,237. doi:10.1680/iicep.1988.798.
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