Later, with the goal of accommodating the water and electric power demand which First Canal was unable to meet, the construction of Second Canal, or Dai-ni Sosui, was started in 1908 as one of the three major projects of Kyoto City (the Second Canal, the water supply, and transport projects such as the city streetcar and expansion of main roads in the city), and was completed in 1912.
その後、第1疏水でまかないきれない水道水や電力需要に対応するため、第2疏水が、京都市の三大事業（第2疏水事業、水道事業、市電開通及び幹線道路拡幅）の一つとして、1908年（明治41年）に着工され1912年（明治45年）に完成した。