Koprivnica-Križevci county has brought irrigation plan, which will be realized through the construction phase and will be the foundation for the development of irrigation in the county in the area of planning, design and coordination of the execution. In order to determine the assumptions that irrigation plan contributes to the development of agriculture and that by its implementation broader social benefits will be achieved, economic analysis and evaluation of the cost-effectiveness of the Pilot Project irrigation Koljak was carried out. By analyzing the key results of the reaserch, it was found that the implementation of the irrigation project reduce production costs in the range of about 8% for maize and cereals, followed by approximately 40% for soybeans, and the tomatoes and peppers yields can be increased by more than 100% over, from the yields that are achieved without irrigation. In the case of pilot irrigation project Koljak, the structure of financing investments in the accumulation of Sirova Katalena and retention Koljak is 100% by the State. On-farm investment in irrigation equipment and machinery will be taken over by end-users, but farmers can through subsidies from the EU IPARD program for mechanization and modernization to cover up to 50% of costs. In this way, conditions for increasing the yield of the agricultural process and greater "resilience" of agricultural crops in the dry and rainy periods are achieved, and also the competitive advantage over that manufacturers that haven't solved agricultural production through irrigation systems is secured. Key research findings undoubtedly confirm both of the hypotheses: 1. By economic analysis in the progress of implementation of the irrigation project, we significantly reduce the cost of crop production 2. With Project access for growing crops, we provide a competitive advantage, and thus the survival on the market