This is the first time the slit-type sabo dam project on the main river--Keelung River. Its main function is to prevent rock and floating log from Yuan-Shan-Zi Weir and the entrance of flood division tunnel. The project includes three sabo dams and the bank protection facility. The highs of sabo dams are 2 of 2-meter and 3-meter; their open width are 1.5-meter and 2-meter; and the length of sabo dams are 56-meter, 71-meter, and 63-meter. The bank protection facilities include bank of riverside, wire-meshed cobbles, and existing bank protection facility, total length of around 1-km.