The correct selection of the species composition of afforestation in relation to the habitat conditions has a decisive impact on the effects of forest reclamation. In most of the reclaimed forestry areas in Poland, the stands enter the prelogging period, and it is possible to assess the first economic and production effects of reclamation. The assessment was made based on the analysis of the size of the harvested wood during the intermediate cutting on the heap of the former ‘Piaseczno’ opencast sulphur mine located in southern Poland and managed by the State Forests. At this stage of development,