The most likely location for a Russian lumber mill is in

Taiga

Explanation:

The majority of Russia's region is extremely cold. To the point where it freeze the soil and make it hard for trees to grow on top of it.

Taiga is a type of biome with typically low temperature,  But not low enough to freeze the soil. This make it possible for various types of trees to grow (such as  pines, spruces, and larches ) . This is why Taiga is the most likely location for Lumber mills in Russia.

elastic potential energy

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.