Masani barrage, also Masani bridge, a barrage on the seasonal Sahibi River completed in 1989, is named after the Masani village in Rewari District of Haryana in India. Masani barrage also serves as a bridge on NH 919. Water storage in the barrage was made perennial in 2017 after a gap of 50 years. This barrage is important part of ecological corridor along the route of Sahibi river which traverses from Aravalli hills in Rajasthan to Yamuna via Matanhail forest, Chhuchhakwas-Godhari, Khaparwas Wildlife Sanctuary, Bhindawas Wildlife Sanctuary, Outfall Drain Number 8 and 6, Sarbashirpur, Sultanpur National Park, Basai and The Lost Lake (Gurugram).

The Sahibi river, also called the Sabi River, is an ephemeral, rain-fed river flowing through Rajasthan, Haryana and Delhi states in India. It originates in the eastern slopes of the Saiwar Protected Forest (PF) hills in Sikar District, enters Jaipur district near the foot of these hills, and after initially flowing southeast and east turns northeastwards near Shahpura and continues further till it exits Rajasthan to enter Haryana and further drains into Yamuna in Delhi, where its channeled course is also called the Najafgarh drain, which also serves as Najafgarh drain bird sanctuary. It flows for 300 km of which 157 km is in Rajasthan 100 km is in Haryana and 40 km in Delhi.