Proper environmental project management is a significant element in shaping a positive, pro-environmental image of urban agglomerations and adjacent towns. Environmental resource management and protection, as well as spatial planning in accordance with sustainable development principles, are the most important factors in creating a positive image of, and strategies for, cities. An example of a large, innovative environmental project implementation is the Central Sewage Treatment Plant in Kozieglowy, in the agglomeration of Poznan, and its installations and equipment impact assessment studies. Important aspects of the project were mediations, which took place from May 2011, until the end of April 2012.