 This has a capacity of 5.6 billion litres and a maximum depth of 13.4 metres.The Vartry Reservoir scheme involved the partial redirection and damming of the Vartry River, the building of a series of water piping and filtering systems (and related public works) to carry freshwater to the city.Between 1862 and 1868 the lower reservoir was formed by constructing an earthen dam across the valley of the River Vartry after a Dublin Water Works Committee was established to develop a new water supply to Dublin and suburbs.