A twin-leaf swing bridge that will connect Renfrew and Yoker in West Dunbartonshire forms the centrepiece of the project.
The animal was spotted drifting by on its back while tucking into a fish near the Gorbals.
John Bowman, 50, was last seen at his home in Shettleston, Glasgow, more than a week ago.
Officers are currently trying to establish the identity of the person, who was recovered from the water on Monday.
