Mrassu

The Mrassu or Mras-Su (Russian: Мрассу́^[1] or Мрас-Су́,^[2] Shor: Прас, Пырас, Пырас-суғ, romanized: Pras, Pıras, Pıras-suğ) is a river in Kemerovo Oblast, Russia. It is a left tributary of the Tom (in the Ob's drainage basin), and has its sources in the Abakan Range. It is 338 kilometres (210 mi) long, with a drainage basin of 8,840 square kilometres (3,410 sq mi).^[2] The Mrassu joins the Tom near Myski.

Mrassu
Location
Country	Russia
Physical characteristics
Mouth	Tom
• coordinates	53.7486°N 87.7986°E / 53.7486; 87.7986
Length	663 km (412 mi)
Basin size	17,600 km2 (6,800 sq mi)
Basin features
Progression	Tom→ Ob→ Kara Sea

The Mrassu freezes from mid-November to April. The water flow at Myski averages at 155 square meters per second (1668 ft³/sec) every year with a minimum of 24.4 m³/sec (262 ft³/sec) in February and a maximum of 694 m³/sec (7470 ft³/sec) in May.^[3]