Section because it took place on the river. Active colonization began to occur in the late 18th century, when, and was founded LOTS (now Dnepropetrovsk), and received a new impetus in the mid 19th century. It was connected with the fact that in the territory have been actively developed rich deposits of minerals that are used in ferrous and non-ferrous metallurgy.

Make this lower case.
section because it took place on the river. active colonization began to occur in the late 18th century, when, and was founded lots (now dnepropetrovsk), and received a new impetus in the mid 19th century. it was connected with the fact that in the territory have been actively developed rich deposits of minerals that are used in ferrous and non-ferrous metallurgy.