List of reservoirs on Jersey

Val de la Mare Reservoir looking eastwards towards the sea

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 (10,000,000 imp gal; 12,000,000 US gal) of water daily (28,000,000 litres (6,200,000 imp gal; 7,400,000 US gal) at Handois, and 18,000,000 litres (4,000,000 imp gal; 4,800,000 US gal) at Augres).[2]

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]

  1. ^ "Company Location Map" (PDF). jerseywater.je. Retrieved 15 July 2022.
  2. ^ Howard, Jonathan (December 2011). "Val De La Mare dam, Jersey: design and installation of a geomembrane lining". Dams and Reservoirs. 21 (4): 159. Bibcode:2011DamRe..21..159H. doi:10.1680/dare.2011.21.4.159.
  3. ^ Booth 2021, p. 32.
  4. ^ McLoughlin, Rod (25 November 2021). "Reservoir 'may need rebuilding'". Jersey Evening Post. Retrieved 15 July 2022.
  5. ^ Morel, Julien (16 August 2021). "Flooding Le Mourier Valley could be required by 2045". Bailiwick Express. Retrieved 15 July 2022.
  6. ^ Booth 2021, p. 18.