(B) The Tawa river is the Narmada’s longest tributary, at 172 km. It rises in the SatpuraRange of Betul and flows north and west. It joins the Narmada at the village of Bandra Bhan in Hoshangabad District. the Bori Reserve Forest, India’s oldest forest preserve, , wasestablished in 1865 along the river Tawa. The Bori Reserve Forest is a part of the Bori Sanctuary, which is the part of the Pachmarhi Biosphere Reserve, established in 1999.It covers much of the upper watershed of the Tawa.