The railway is not electrified and it has Finnish broad gauge.
These mines were the primary reason to extend the railway north of Kaulinranta.
There were in 2009-2010 short term plans to extend the railway 15 kilometres (9.3 mi) from Äkäsjokisuu to the new Tapuli mine in Sweden, but the mining company decided to use Narvik as shipping port instead.
There are also suggestions on extending it to Skibotn or Tromsø in Norway.
The train also carries road vehicles from Pasila station to Kolari.