A new project management model which handles the risk factors and uncertainties encountered in the design and construction of coastal projects is developed and named as the Optimum Risk Management (ORM) model. The ORM model, contemplates to maintain the project objectives within the predetermined time and budget constrains by optimising the construction operations with the incorporation of risk factors and uncertainties inherent in the execution of coastal projects. In Turkey, the overruns in completion times of activities art: unanticipated anomalies in project management arising from special problems. The project objectives can not be maintained within the: time and budget constrains due to these problems encountered during construction, the most consequential and recurrently observed one bring the allocation of inadequate yearly funds to projects. The project management model developed can be used for risk identification and response intentions under these circumstances ill Turkey. The reliability-based risk assessment model developed, can also be utilized for the prediction of project parameters, when coupled with a macro-scale political and economical prediction model.