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 At first, the East Siberian Railway was a single-track railroad. In 1907, they began the construction of the second track, which would end in 1916. Administratively, the main line was divided into four railways: the Siberian Railway (from Chelyabinsk to Innokentyevskaya railway station with a line towards Tomsk), the Transbaikal Railway (from Innokentyevskaya railway station to Sretensk with a line towards Manchuria railway station), the Ussuri Railway (from Vladivostok to Khabarovsk), and the Amur Railway (from Kuyenga railway station to Khabarovsk). In 1915, the East Siberian Railway was divided into five railways, the Omsk Railway, Tomsk Railway, Transbaikal Railway, Amur