Hydrotechnical investments in Natura 2000 areas may characterized
potentially significant conflict for natural environmental values. For limitation of negative effects of its implementation it must be execute natural inventory and va-lorisation and next evaluation of impact for natural environment. Basic principle is prevention and restrict to losses in natural environmental. Eherever losses are inevitable it should be indicated methods of natural compensation. Evaluation of condition of natural values in The Chróścice Dam areas not indicate on an occur-rence of significant limitation for reconstruction of dam. Most conflict building works will run between flood embankments. To restore habitats of species protected in Natura 2000 Special Protected Areas Grądy Odrzańskie metods of natural compensation were proposed. Natural compensation was agreed with build designers. On the basis of investigation made sugestion, that natural values of Odra Valley are protected in reconstruction of The Chróścice Dam.