Original sentence: In  winter, when the flow in the River Medway exceed 275 million litres per day, river water is pumped to storage in the the reservoir.It was completed in 1975 having been filled with over 31,300 million litres of water.Many recreational activities such as sailing, rowing, trout fishing and walking take place on and around the reservoir which makes it one of the region’s most popular attractions.The reservoir in common with most large clean water lakes, is host to a large variety of wildlife.There is an outline plan to raise the water level by a further 3m to increase the yield by up to 30% to help with the growing water demand in south-east England.This will however put further demands on the River Medway to supply the additional water required with the potential for environmental degradation in the river and the eco-systems that it supports.Work began to construct the reservoir in 1973 by damming and then flooding a valley
Edited sentence: Every winter, water from the River Medway is used to top up the reservoir, when flows in the river exceed 275 million litres per day.It is also worth noting that there is an outline plan to raise the water level by 3m to increase the yield by up to 30% to help with the growing demand in southeast England.It is slightly misleading to say that the reservoir was 'dug' as it resulted from the flooding of a naturally occurring valley, dammed at one end.Many recreational activities such as sailing, rowing, trout fishing and walking take place on and around the reservoir; this makes it one of the region’s most popular attractions.Some 230 acres of Bewl Water was, in 1937, a farm.Subsequently the farm was renamed 'Hook Farm', after the name of the hill opposite the new property.The farm was renamed in 1939 'Nine Acres'.The farmhouse in 1937 was the cottage in the slipway complex that also contains the barn.The name of this farm, Beale's Barn Farm, is acknowledged in the name of the plant nursery adjacent to the curtilege of Bewl Water.The reservoir is host to a huge variety of wildlife.The water supplies a number of local towns.This name was derived from the size if the field in front of the property newly built, now Hook House, by the purchasers of 'Beale's Barn' in 1937.Work began to dig the reservoir in 1973: by the time over 31,300 million litres of water had been pumped in, it was completed in 1975