. "The Lower Tunguska River is 1,857 miles (2,989 km) long. It has an average discharge of 3,600 m\u00B3/s and a drainage area of 473,000 km\u00B2. It flows into the Yenisei. The countries within its drainage basin are: Russia"@en . "How long is the Lower Tunguska River"@en . . "The Lower Tunguska River is 1,857 miles (2,989 km) long. It has an average discharge of 3,600 m\u00B3/s and a drainage area of 473,000 km\u00B2. It flows into the Yenisei. The countries within its drainage basin are: Russia"@en .