Açude-ponte de Coimbra, Weir and road bridge over the Mondego River in Coimbra, Portugal.

The Açude-ponte de Coimbra is a weir combined with a road bridge that crosses the Mondego River. The structure creates a water reservoir while allowing vehicles to travel across it at the same time.

This infrastructure project was built between 1978 and 1981, creating a permanent water mirror in front of the city. The work transformed how the river functioned in Coimbra.

The weir holds back a permanent sheet of water in front of Coimbra, and the road deck on top carries traffic across the Mondego at the city's western edge. The barrier and its crossing were planned together in 1978 and working by 1981, so the reservoir and the urban road link are one and the same structure.

Visitors can walk along the structure or drive across it while viewing the water below. The best time to visit is during clear weather when you can see the surrounding landscape and water surface clearly.

The weir was designed in 1978 and began operating in 1981, creating a permanent water mirror in front of Coimbra. The road bridge was added as a direct consequence of the weir's construction, forming an urban crossing at the city's western edge.