Complex sentence: The city is located on a flat level surface and on very dry soils, as a result although all of the Minsk Metro stations are under the surface there are no deep-level stations that are found in most of ex-Soviet cities.
Split into simpler sentences: The city is located on an almost level surface and on very dry soils. As a result, although all of the Minsk Metro stations are under the surface, there are no deep-level stations that are found in most of ex-Soviet cities.