This research is part of a series of field sociologic surveys realized by us over many years and have decided to find out, successively as many elements, related to the specific of the Jiu Valley. This time we focused our attention on Petrosani, the biggest territorial administrative unit of the six that make up the Jiu Valley conurbation. Thus we learned about the polarization of poverty in the municipality of Petrosani, existing here the signs of an economic segregation easy to notice depending on the area they live. We also determined how it is seen after more than a decade and a half the government's decision to reduce employment in the mining and what were the main negative effects that acted at the level of community and family.