The 26-week scheme will get underway at the Rob Roy Bridge in Peterculter on Monday, 27 June.
Features include demolishing a reinforced concrete section of the 19th century structure, which will be rebuilt to modern standards.
For safety reasons, full road closures will be in place during weekends to protect workers and allow removal of the aqueduct protection system and demolition plant.
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Diversions will be in place.
Cllr Neil Cooney said: "Rob Roy Bridge forms part of the adopted road network and has long been identified as a structure requiring significant remedial works.
"We are co-ordinating the work along with the programme of works for the Aberdeen Western Peripheral Route in order to keep disruption to the travelling public to a minimum, with the structure restricted to a single lane with traffic lights for most of the works."
(LM)
