Abstract: The development process of huge infrastructure projects often lead to far-reaching impact on the environment, economic and social system. One of them is the construction of Jatibarang Damin Semarang, the flood mitigation project. This projectconsists the construction of reservoirs andthe normalization Garang Riverto improved drainage system in SemarangCity. The upstream dam construction activities have been completed in early 2014, which will certainly have an impact on social, cultural and economic changes in society.