Philip McKay, head of roads and infrastructure, confirmed that recent invasive site investigations have identified unexpected anomalies in the bridge’s design and several serious defects. These findings undermine earlier assumptions made during the option appraisal process, which had supported limited strengthening repairs to restore an 18-tonne weight limit.

Among the critical structural issues identified are reinforcement problems, coupler corrosion and deck deterioration.

Investigations revealed that reinforcement in a key part of the main bridge span, the hinge, does not match the original design drawings, compromising earlier strengthening plans.

Steel reinforcement bars in the bridge are joined using couplers. Testing of one coupler showed severe corrosion, worse than in the main bars themselves. Engineers believe this deterioration is likely widespread across the structure.

The bridge deck is suffering from more extensive concrete damage than anticipated, making reinstatement of a structurally sound reinforced concrete element unfeasible under the current plan.

The council is now urgently reviewing its options with engineering consultants WSP to determine a viable way forward. McKay acknowledged that the new findings will “significantly delay the previously published repair programme,” with no revised timeline yet available.

While pedestrian access will remain open, the council has pledged to carry out regular load tests to ensure safety for active travel users. Officials also recognised the disruption caused by the ongoing closure, stressing that the bridge remains a priority for both residents and local businesses.

“Aberdeenshire Council fully recognises the significant and ongoing impact that the closure of Aboyne Bridge has on daily life in the area,” McKay said. “We continue to treat this as a priority and our teams and contractors are working as quickly as possible to identify a safe, reliable and sustainable solution for the community.”