Ecologically at-risk features are those where the occurrence of failures can result in significant, and sometimes catastrophic, chemical environmental contamination. Often these failures can also have human victims such as company personnel and inhabitants of nearby settlements, as was the case, for example, with the accident at the Chernobyl nuclear power station in Ukraine. It is well known that the economy of the Ukraine is based on mineral extraction and heavy industries, such as metallurgical, chemical, heat, power, and heavy mechanical engineering. These industries are the most dangerous to the environment and also those which have a negative influence on all environmental components: atmosphere, water resources, lakes, soil, flora and fauna. At these companies millions of tons of waste with danger classes I–IV are collected in special sediment containers, stores, and storage areas where volumes frequently amount to hundreds, thousands or millions of cubic meters. The height of the protecting dams for many storage areas or repositories of waste from the mining and processing of iron ore reach a hundred meters.