The condition of the sludge depots on the sites of the preserved explorative wellplacement is considered in the article. It is revealed that the surveyed objects are characterized as cluttered or polluted to the different degree. On the studied sludge depots the presence of the aboriginal vegetable communities at various development stages with the high overgrowing degree from 5 to 100 % of the dredging area itself and the water-cut with theopen water mirror from 5 to 90 % of the dredging area of the depot hollow is noted.