Work to construct the second biggest covered reservoir in Europe at Fritchley is set to get underway.
Construction teams were this week said to be poised to begin work on the £30million project which was given the go-ahead last October.
Construction of the huge concrete reservoir is set to take about four years and will be carried out in two phases.
The main construction works are due to start imminently and will involve the excavation, construction and commissioning of a new 100m by 130m twin compartment concrete reservoir next to the old one.
The old Ambergate Reservoir – which holds 128million litres of water and is the tap supply for the East Midlands - will be decommissioned and a new smaller reservoir built within the area.
Severn Trent said the present structure has been in use for more than 100 years and has deteriorated badly.
Duncan Wratten, Severn Trent’s project manager, said: “Options to refurbish the existing reservoir were taken into account.
“However, following careful consideration it was agreed that a new reservoir would need to be constructed in order to continue the supply of quality water to Severn Trent’s customers.”
Severn Trent has previously promised to work alongside residents and businesses, with an aim of keeping disruption to a minimum.
In February, Severn Trent Water announced it was also spending £1.3 million replacing pipes near Belper after a series of disruptions to the town’s water supply.