For development of irrigated agriculture in the Tapi basin, Ukai-Kakrapar Scheme, one of the biggest irrigation scheme in Gujarat, was taken up by the Government of Gujarat. Tapi is one of the largest rivers in central India which flows west-ward and discharges into the Arabian Sea. The present project work has been taken to study problems in existing unlined Kakrapar right bank canal of Kakrapar project. Kakrapar weir is located on river Tapi in village Kakrapar of Mandvi taluka of Surat district. As increased in demand-of food and fodder, demand of water for irrigation is also increasing In unlined canal high velocity cause erosion and heavy seepage loss leads to water logging problems in surrounding area. These problems can be solved by canal lining. Both these reasons have reduced the availability of water to the farmers. With modernization of canal one has to take into consideration the existing cross drainage or regulating structures on existing canal has also to be redesigned. Detail economic analysis is also done giving effective measures to reduce the cost. Thus to improve the efficiency of the canal network, modernizing existing canals has become need of the hour.