The Okhla barrage is a 791 meters or roughly 800-yard long weir across Yamuna River opened in 1874. It also serves as the location of Okhla Bird Sanctuary today. It is situated 10 km to the south of New Delhi and downstream of Nizamuddin bridge at Okhla, where Agra canal originates from it. The top of barrage also serves as the Delhi-Noida carriageway of Kalindi Kunj-Mithapur road. Nearby later-era New Okhla Barrage is 554 meters long.