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Mancunian Way sinkhole repairs reach major milestone

United Utilities has said that work to repair the Mancunian Way following the collapse of the road last summer has reached a major milestone with tunnelling of a new sewer under the carriageway now complete.

The water company has said that there is still a significant amount of work to be delivered on the £6.5M repair project but it is on target to be completed at the end of May.

The ground collapse after heavy rain caused a sinkhole to open in the M56 carriageway, which United Utilities has said caused major damage to a Victorian sewer which runs below the carriageway. Unstable ground conditions meant that the existing sewer could not be repaired and had to be abandoned after stabilisation using concrete.

The site team now needs to connect the new tunnel to the rest of the sewer network and transfer the sewer flows from the temporary by-pass pipework which is running above ground. The deep concrete shafts that were built to give access for the tunnelling machinery will then have caps fitted over them to support the road surface.

“We understand that motorists just want to see the work done and the road reopened,” said United Utilities wastewater network technical manager Tony Griffiths. “That’s why it’s great news that we’ve completed this major milestone – now that the tunnelling work is done, the worst of it is behind us.”

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