Twyford Old River South Bridge and White Bridge repairs continue
Bridge repairs that closed a road in Berkshire for three weeks are now expected to last for an extra four.
Essential works on the Old River South Bridge and White Bridge on the A3032 at Twyford began on 21 July and were to end on 10 August.
Wokingham Borough Council later extended this to 31 August, but has issued a revised date of 9 September.
Matt Davey from the council said a high pressure water main that was not on the records had been discovered.
Mr Davey, who is head of highways and transport, added: "Because of the nature of the live main, the work had to be undertaken by Thames Water, resulting in a delay to the overall programme.
"However an additional delay was also caused by the need to redesign some of the steelwork required for the severely corroded White Bridge."
When the road reopens works are expected to continue for a further two weeks with traffic lights.