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 carried continued its increase along with the reconstruction of transportation facilities and introduction of new technology. In 1948, the East Siberian Railway reached its pre-war loading and cargo-turnover level. In 1958, they commissioned the new Taishet-Bratsk-Lena railway, which connected the basins of the Angara and Lena Rivers with the rest of the Siberian railroad network, providing immediate access to mineral deposits in the Angara basin (e.g. the Korshunovskoye iron ore deposit) and abundant logging regions and ensuring an uninterrupted supply of cargo to the northern areas of Irkutsk Oblast and Yakutia. At the end of 1965, a long Abakan-Taishet section