During his visit to the giant tunnel on Rama IX and Ramkhamhaeng Roads, M.R. Sukhumbhand said the tunnel takes water the from Lad Phrao and Saen Saeb Canals. The tunnel also helps drain excess water from Bueng Kum, Huai Khwang, Lat Phrao, Wang Thonglang, Bang Kapi, Chatuchak, Min Buri, Bang Sue, Saphan Sung, and Khan Na Yao districts into the Chao Phraya River.
Three out of four water pumps were working during the governor’s visit, and able to drain water at the rate of 45 cubic meters of water per second. All the four pumps will be in full operation in the event of heavy rain.
The governor insisted the tunnel is working in its full capacity, but only one tunnel cannot drain all of the water in Bangkok. He explained that the tunnel was designed for around 50 square kilometers out of the 1,600 square kilometers area of the capital.
M.R. Sukhumbhand added that three more tunnel projects are in the pipeline; they will be constructed at Bang Sue Canal, Nong Bon Swamp, and Don Muang. Once finished, the project will complete the water release system in Bangkok.