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River Pinn at Pinner, Eastcote Road
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River Colne at Denham Colne
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Wraysbury River at Stains, Pounds Mill
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River Ver at Colney Street
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River Colne at West Drayton
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Radlett Brook at Radlett
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River Bulbourne at Hemel Hempstead, Old Fishery Lane
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River Colne at Stanwell Mill
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River Chess at Rickmansworth
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River Pinn at Uxbridge
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River Red at Redbourn River Red
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River Chess at Chesham
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River Colne at Iver, Clisbys Bridge
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River Ash at Staines Ash
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River Gade at Hemel Hempstead, Bury Mill,
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River Pinn at Uxbridge, Philpots Bridge
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River Pinn at Pinner, Moss Close
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River Ver at Markyate
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Mimmshall Brook at Mimmshall Brook
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River Pinn at Waxwell Lane
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Colne Brook at Hythe End
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Borehamwood Brook at Borehamwood
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River Gade at Croxley Green
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Mimmshall Brook at North Mymms
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River Colne at Staines Trading Estate
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Frays River at Yiewsley
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River Pinn at Ickenham, Swakeleys Road
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River Ash at Knowle Green
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River Colne at London Colney
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River Colne at Willowbank
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River Bulbourne at Hemel Hempstead, Two Waters Road
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River Pinn at Pinner, Avenue Road
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Wraysbury River at Staines Moor
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Colne Brook at Iver Bridge
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River Pinn at Ruislip
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River Misbourne at Missenden
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Colne Brook at Hythe Weir
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River Colne at Watford
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Poyle Channel at Poyle
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River Pinn at Uxbridge, Hercies Road
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River Ver at Redbourn River Ver
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Frays River at Uxbridge, Fountains Mill
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Walton PS
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River Misbourne at Denham Lodge
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Denham Lodge
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Wraysbury Mill
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Wraysbury Offtake FD
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Braybourne Close
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Stanwell Gate 2 (Airport Way)
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Old Mill House Penstock
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Huntsmoor Weir
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Stanwell Gate 1 (Lake Offtake)
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Moor Lane Offtake
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Huntsmoor Weir
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Littleton PS