East Siberian Sea runoff into the East Siberian Sea is relatively small at about 250 km/year that makes only 10% of the total runoff in all the Arctic seas of Russia. The largest contribution is from the Kolyma River at 132 km, followed by the Indigirka River at 59 km. Most runoff (90%) occurs in summer; it is concentrated near the coast, owing to the weak river currents, and therefore does not significantly affect the sea hydrology. The water exchange between the neighboring seas is as follows. The annual outflow to the Laptev Sea, Chukchi Sea and Arctic Ocean is 3,240, 6,600 and
East Siberian Railway Railway, and Ussuri Railway. In 1934, the East Siberian Railway became an independent administrative and economic unit extending from Mariinsk railway station to Mysovaya railway station. In 1936, the Krasnoyarsk Railway was excluded from the East Siberian Railway. In the 1920s-1930s, technical reconstruction of the railway was carried out and its locomotive and rolling stock were upgraded . Several new lines were also built over the ridges of Sayany, Alatau, taiga, and swamps towards coal and iron ore deposits, woodlands, and banks of large rivers. In 1922-1926, the Achinsk–Abakan line was constructed, which connected the southern areas of Krasnoyarsk Krai,