 Nonetheless, this will not enable through navigation from Lake Baikal to the Yenisey, as none of the existing three dams has been provided with a ship lock or a boat lift, nor will the Boguchany Dam have one.Despite the absence of a continuous navigable waterway, the Angara and its tributary the Ilim were of considerable importance for Russian colonization of Siberia since ca.1630, when they (and the necessary portages) formed important water routes connecting the Yenisey with Lake Baikal and the Lena.