Water crisis in Iran justify the implementation of different water extraction projects. Kashmar flood spreading project has been so costly like other flood spreading projects. Economic evaluation of these activities to determine benefit-cost ratio is essential, because of different views about the results and efficiency of flood spreading projects. Firstly, all costs and incomes of Kashmar flood spreading were determined for given years. Then the economic efficiency of the project was assessed by using the common engineering economic methods. Economic evaluation of this project indicated that the profitability was higher than the cost of implementing it by considering 20% profit, the net present values (NPV) of it is 243944716.8 Rials  which is positive yet. The Benefit- cost ratio (B/C) is 1/74 which showed that the project is economic. Finally, internal rate of return of this project is calculated as 55% that the comparison of this amount to the acceptable minimum  rate namely 20%  has indicated that Kashmar flood spreading project is completely economic.

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Water crisis in Iran justify the implementation of different water extraction projects. Kashmar flood spreading project has been so costly like other flood spreading projects. Economic evaluation of these activities to determine benefit-cost ratio is essential, because of different views about the results and efficiency of flood spreading projects. Firstly, all costs and incomes of Kashmar flood spreading were determined for given years. Then the economic efficiency of the project was assessed by using the common engineering economic methods. Economic evaluation of this project indicated that the profitability was higher than the cost of implementing it by considering 20% profit, the net present values (NPV) of it is 243944716.8 Rials  which is positive yet. The Benefit- cost ratio (B/C) is 1/74 which showed that the project is economic. Finally, internal rate of return of this project is calculated as 55% that the comparison of this amount to the acceptable minimum  rate namely 20%  has indicated that Kashmar flood spreading project is completely economic.