Abnormal rains became the reason for Daldykan river case

In response to the reports made by local media on September 6th regarding changes in coloration of the Daldykan river, situated in Norilsk Industrial area, NornickelPublic Joint Stock Company "Mining and Metallurgical Company "Norilsk Nickel” and its subsidiariesGo to the glossary declares:

Nornickel has investigated the reasons for temporary color change of Daldykan river located in Norilsk Industrial area. The investigation results:

In 2015-2016 the CompanyPublic Joint Stock Company "Mining and Metallurgical Company "Norilsk Nickel"Go to the glossary modernized tailings dam and tailings pipeline of hydrometallurgical shop of Nadezhda Metallurgical Plant (NMP). In the beginning of September fitting and assembling of the last section of pipeline was at the final stage. Before a pipe tie-in the standard work procedure requires to drain the whole pipeline with discharge of wash water into tailings dam. Cut-off dikes are in tie-in areas to prevent spreading of residual wash water. On the 5th of September after abnormal heavy rain (the area received approximately 50 percent of monthly average precipitation in rainfall in the course of 24 hours) the overflow of one of the dikes occurred, and water entered Daldykan river.

Short-term river color staining with iron salts presents no hazards for people and river fauna.
The Company undertakes all necessary actions to assess the areas with the biggest historical pollution and eliminate effects of the old tailings pipeline operation by sanitary stripping of the ground. Nornickel will put the most efforts to avoid such incidents in future.


The operational tailings pipeline has been in use since 1997 and is made upof glass-lined pipes, which is one of the best available technologies of the 1990s. Two years prior to the end of service life of the pipeline, the company initiated a tailings dam reconstruction project and pipeline replacement. A total of 12 800 m of pipes based on a new technology with lining of high-pressure polyethylene was procured from Somex, to prevent any leakage. In 2015-2016 Nornickel invested in excess of RUB 1 billion in the tailings pipeline revamping project at Hydrometallurgical Shop of Nadezhda Metallurgical Plant, concurrently the Company a delivered a NMP tailings dam rebuild project, which will secure safe operation in the coming years. Total project costs amounted to approximately RUB 3 billion.

On September 12, 2016 the Shop will fullytransition to dumping tailings in the rebuilt dam via the new tailings pipeline. In accordance with the new development strategy, Nornickel is leading a large-scale production upgrades initiative, which, among other goals, will eliminate the legacy environmental issues. Capital expenditures will reach RUB 800 billion by 2020, with RUB 300 billion earmarked for environmental projects.