Tujunga Wash, Aliso Wash, and Brown's Canyon Wash join the river from the left. The river flows on to a basin called the "Sepulveda basin", controlled by a dam at its southeastern end. This basin is incredibly rich in wildlife and plants. Normally, there wouldn not be a year-round flow of water here. But because of 75 million gallons of water flowing into the river every day from the Donald C. Tillman Water Reclamation Plant, there is an year-round flow of water. This water is not suitable to be drinking water, but is safe to touch.