More than NUMBER@1 km , or over NUMBER@2 % of the LOCATION@1 section , is at an altitude of more than NUMBER@3 m . There are NUMBER@4 bridges , totalling NUMBER@5 km , and about NUMBER@6 km of the railway is laid on permafrost .

More than NUMBER@1 km , or over NUMBER@2 % of the LOCATION@1 section , is at an altitude of more than NUMBER@3 m . There are NUMBER@4 bridges , totalling NUMBER@5 km , and over half the length of the railway is laid on permafrost .
