During the period of constructing the Dolna Odra Power Plant (1972-1975), the nearby muck-peat soils derived from low sedge and reed-sedge peat, were strongly dehydrated and over-dried. In years 1975-1976, on the over-dried terrain, the ground water level came back to the state from before the construction of the Power Plant. In 1998, those soils, as well as meadow flora covering them, was again put under research. Stated were the following: a relatively high loss of organic matter in the surface layer; vanishing of the spongy peat mass; an increase in the bulk density; and accumulation of macro- and microelements. On the over-dried organic soils, associations of low quality plants are currently in majority. However, the chemical composition of organic soils and meadow plants does not show any excess contamination with heavy metals.