The work described here is designed to guide Engineers, Planners, Hydrologists,and practitioners in the principles involved when one considers Water transportation from one region with sufficient water sources to a semi-arid region. The principles described in this Manuscript can easily be replicated to areas with similar conditions of Tanzania. The Mathematical tools are simple and optimization of costs may easily be determined to decide the feasible options for water transportation to supply the dry region. The case study presented in this Manuscript has data scarcity. Assumptions and statistical methods to improve the estimations have been employed.