The Chongguan Canal's headworks are located on the Yilan River. Historically, the frequent flooding of the Yilan River made water intake difficult, leading to irrigation challenges. In 1932, the Water Resources Bureau implemented flood control projects, and a weir was constructed 100 meters downstream from Yilan Bridge to raise the water level and facilitate irrigation. The canal now serves a vast irrigation area, with channels winding through rural landscapes. Notably, two aqueducts built in 1933 still span the canal, marking an era of impressive water resource engineering.