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Six consortia are in the running for two long-term contracts with Scottish Water totalling 拢1.5bn.

The water utility is seeking a waste water infrastructure alliance partner and a water infrastructure alliance partner to work with it from 2015 for up to 12 years.

Among the firms vying for the places are Mace, CH2M Hill, Balfour Beatty, Carillion and Morgan Sindall.

The winning bidders will be required to design and build new water and waste water facilities, maintain existing facilities and make modifications to facilities.

In the OJEU documentation for the contracts Scottish Water said a significant portion of the waste water partners work would be 鈥渋n connection with projects intended to remove properties from the flood register by addressing flooding resulting from overloaded sewers and also to address unsatisfactory intermittent discharges from the sewer network鈥�.

While, it said the water partner鈥檚 work would centre around projects to 鈥渞ehabilitate鈥� the water mains to decrease risk of leaks and other problems.

The waste water partner contract is estimated to be worth 拢360m between 2015 and 2021, and would be worth the same again if extended for the next regulatory period.

The water infrastructure partner job is valued at 拢375m over the initial six year period and a further 拢375m if extended over the second period of six years.

Both partners will be expected to undertake some initial work ahead of the start of the first regulatory period in 2015.