There is a 22m long overflow weir to the right of the tower. At the Valve Tower, water can be drawn off at one of three levels depending on water quality but the quality of water in the whole of the reservoir is extremely good anyway. Water can be released back to the River Derwent for abstraction downstream at Little Eaton and / or Draycote to feed Church Wilne but that’s not done very often, the preference is to let the water gravitate to Ogston Reservoir and then treated at Ogston WTW. (info from Paul Bingham)

Photo Ref 2006-06 001