**Please note, the Contract Notice has been amended to show 'Design and Execution' at section II.1.2**
The proposed works include demolition and replacement of the reinforced concrete piers (6 no. in total) to the two interchange bridges at Junction 59 on the A1(M). The replacement piers are to be supported on new piled foundations. The bank seat abutments are also to be refurbished with the replacement of the west abutment capping beam to the North Bridge of the interchange.
The interchange bridges are also to be re-waterproofed and re-surfaced and the deck ends modified to accommodate new bridge joints.
Works must be completed with single lane or hard shoulder closures such that two lanes remain in operation in each direction at all times, throughout the day on the A1(M). Temporary support systems and traffic management will have to remain in place over public holiday’s periods. Night-time lane restrictions/closures on the A1(M) will be permitted, however, these are to be minimised.
It is proposed to close one interchange bridge at a time with two-way traffic operating over the adjacent bridge and suitable diversionary routes in place to enable the abutment and deck end works to be complete safely.