Union Minister Nitin Gadkari will inaugurate and lay foundation stones for 31 projects worth Rs 13,296 crore in Jharkhand on Thursday, including stretches of Delhi-Kolkata and Mumbai-Kolkata corridors and Bharatmala packages, under which ring road and bypasses are developed, an official said. Of these, 21 pertain to state capital Ranchi, entailing an estimated investment of Rs 9,453 crore, and nine to Jamshedpur at a cost of Rs 3,378 crore.