Introduction
Early settlers dug tunnels by hand for the Yuemei Canal, resulting in an uneven channel slope and varying tunnel heights, some as low as 60 cm. Years of water flow and geological weathering caused some sections to collapse or silt up. Maintaining the canal's end, which crosses Provincial Highway 3, became increasingly difficult due to utility lines under the road and heavy traffic above. Therefore, in 2017, the decision was made to use a shield pipeline to address these issues.
Traffic