Motorists are being advised that a rural crossing will be closed to traffic for one day next week.
Deerness Bridge will be closed between 7am and 7pm on Wednesday, 9 August.
The temporary bridge, which has been in place since June 2016, is being dismantled and a permanent replacement installed over the coming months.
While the new bridge is constructed, the temporary bridge will be moved upstream to create a new crossing point.
However, Durham County Council needs to carry out works to the temporary bridge before it can be moved.
Temporary diversions through Broom Park and New Brancepeth will be in operation during the day-long closure.
John Reed, Durham County Council’s head of technical services, said: “We are working to minimise disruption for motorists while this important project is ongoing.
“However, it will be necessary to implement some short road closures. We would like to apologise in advance for any inconvenience this causes and thank motorists for their patience.”
Another short road closure will also be required in the autumn to allow the temporary bridge to be relocated. More information on this closure will be available once the date is confirmed.
To view the diversion map or to keep up to date on the progress of the project to replace the bridge, visit www.durham.gov.uk/deernessbridge