The Castleford Waste Water Treatment Works upgrade scheme is due to start on site in April and will be completed in May 2015.

Awarded under the AMP5 Yorkshire Water Framework, the project involved the design and construction of a new inlet works, three primary settlement tanks, an activated sludge plant and three final settlement tanks.

The firms will also deliver two inlet pumping stations and a storm tank, as well as associated sludge treatment facilities to reduce the amount of ammonia released into the river.

Jag Paddam, managing director of Infrastructure at Morgan Sindall, said: “Prior to the award of this delivery contract, Morgan Sindall Grontmij worked closely with Yorkshire Water Services on the feasibility stage of this scheme to consider the various options and identify the best possible solution.

“We look forward to continuing this collaborative approach to ensure that the targets of the Freshwater Fish Directive are met and the quality of fresh water is upgraded to ensure that it can support fish life.”

Other recently awarded Morgan Sindall Grontmij projects include the circa £22 million Bridlington Bathing Water contract and a circa £26 million Scarborough Bathing Water contract, both of which are progressing well.