To build the bridge, the train convoy to sail across the Huai wekwang and not of choice, even today. The construction of over 70 years before seemed particularly difficult is the task of the three bridge towers could not be used as a wooden bridge as concerns. Meters must use work consisted of wood as a high tower to accommodate the Rails across the width of the abyss. The number of Poles, thus acting Hall of Fame shows the width of the bridge, the longest bridge in Thailand since construction started.Prof. 2450 in the reign of King Chulalongkorn The tunnel was completed in the reign of King Rama in the year 1993.2461 but recently completed rail convoy to sail to launch it for the first time. On January 1, 19372464, which is located in the reign of his Majesty the King. VII · Train tunnel that takes 14 years to build three reign. It is the country's top three reasons: Length 1,362, 5 meters, or about 1.3 km to the mouth of the tunnel at the North mouth of the tunnel, the South is higher than 14 m, the second is the point at which the train passed through the highest lean on domestic Thai. Sea level is moderate, 578 m. Little river station Tan Tan King station to Lampang lamphun 8 km long, 200 metre difference in level.
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