The work, commissioned by Yorkshire Water, has been ongoing since January to reduce significantly the risk of sewer flooding to 13 local homes.
A huge storage tank, measuring 15 metres in diameter and 10 metres deep, capable of holding 1,200,000 litres of storm water during wet weather has been built in Coach Street car park.
Dominic Cunney, project manager, said: “We know this scheme has been disruptive to local customers and businesses at times but it was an extremely important scheme and we’re pleased to announce that it is now fully complete.
“The risk of sewer flooding to local homes has been significantly reduced and we’d like to thank residents and businesses for their continued patience throughout this work.”
The project faced many difficulties as the shaft was built in half of one of the town’s main car parks. It is a small working area and ground conditions were very problematic, with the team finding foundations of old buildings under the ground.
This meant a lot of the time, workers on site had to hand-dig which slowed down progress.
They also uncovered numerous cables from other services that were not found in the original investigations and which had to be relocated. To reduce disruption to local residents a customer drop-in was held before the start of the scheme.