Cheshire West & Chester Council said replacement of Barmere bridge on the A49 near Bickley Moss will restart by 14 September.
Demolition of an existing bridge started in July and was due to last until October.
However, technical issues with piling for the new bridge resulted in a delay and piling foundation work for the new steel piles will begin by next week.
Barhale Construction is the contractor carrying out the work.
The council said replacing the old bridge is necessary due to its poor condition which has rendered it unsafe to carry large lorries of up to 44 tonnes.
The delay also extends the period that the A49 will be closed; however, work will be continued at weekends, which aims to speed up the delivery of the replacement bridge.
Cllr Ann Wright, from Cheshire West & Chester Council, said: "Because of the technical problems work at the bridge has not taken place since mid August.
"Engineers considered opening the A49 until the new piling work began, but ruled against this because earlier attempted bore holes for the piles could have weakened the foundations of the existing bridge, which is already in a poor condition.
"The new steel piles have been ordered and the piling foundation work begins by 14 September. The new bridge works should end by early November. We apologise for the delay which was caused by unexpected problems.
"I would like to reiterate that businesses are still open and are well sign posted."