At the end of the 16th century, the Idrijca River was dammed at Kobila and the first water channel known as Rake was built. Initially, the 3.6-km wooden channel extended all the way to the centre of the town. Later, it was reinforced with support walls, and built with stone and clay. Today, it runs only from the dam at Kobila to the Kamšt water wheel.
For centuries, the water flowing in the Rake drove the mine devices known as kamšt (water pump), which pumped water and lifted ore from the pit. The last and most noble, still preserved kamšt was built in 1790 close to Joseph’s shaft. Operating continuously for a period of 160 years, it pumped 300 litres of water per minute from a depth of 283 m. Its huge wooden wheel has a diameter of 13.6 m and is considered the largest pumping mechanism of its kind in Europe.
Today, a beautifully maintained educational trail leads along the Rake.
In year 2021, Idrija Tourism Board in collaboration with the Idrija Municipal Museum digitized the kamšt (a wooden wheel used to pump water from the mine) as a part of a project.
The investment was co-funded by the Republic of Slovenia and the European Union (the European Regional Development Fund).