What happened

A loss of integrity on a Lukoil pipeline linking the Oshskoye field's multiphase pumping station with booster pumping station No. 5 at the Kharyaginskoye field released about 100 tonnes of oil-containing fluid. Lukoil said the leak was detected during a helicopter inspection on 11 May, roughly 300 metres from the Kolva River. Russian environmental authorities estimated that about nine tonnes entered the river, while most of the remainder contaminated nearby soil and waterways. The slick moved toward Usinsk and prompted a regional emergency amid concern that contamination could travel through the Pechora river system toward the Barents Sea. No injuries were reported. This is mapped approximately at Usinsk because public reporting did not provide precise rupture coordinates; it represents the wider, repeatedly documented pattern of oil spills in the Usinsk and Komi region without treating that pattern as additional standalone incidents.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.