 A 10 lane road link will also be set up over the dam, greatly reducing the distance between Saurashtra and South Gujarat.The project, which will create world's largest freshwater lake in marine environment, will cost INR90,000 crore or US$12.75 billion (2015-16 estimates with 8% annual inflation) excluding the cost of tidal power plant.Project entails construction of the main ""Kalpasar dam"" across Gulf of Khambat and another Bhadbhut barrage on Narmada river, as well as a canal connecting the two.