Mumbai: The Brihanmumbai Municipal Corporation will kickstart work on widening and rejuvenating two important rivers – Dahisar and Poisar – which originate from Tulsi Lake in the Sanjay Gandhi National Park. Pegged at an estimated cost of Rs1,192 crore for Poisar river and ₹246 crore for Dahisar river, the project includes removal of encroachments, sewage treatment, construction of nallah interceptors …