Oil pipeline built in 1930s-1950s and new pipeline build in 2000s go over salmon spawning river in the north of Sakhalin.....Oil and gas pipelines cross Sakhalin region in multiple directions transferring valuable minerals to Russian Far East mainland and abroad. ..For ages, Sakhalin has been Russia's primary source of raw materials, including crude oil, natural gas, and abundant seafood catch. ..This fact, however, did not make a difference in the conditions of local infrastructure, transportation, standards of living, and small-business opportunities throughout the region.