Voltoya River Voltoya River The Voltoya is a river in Spain. It is a tributary river of Eresma River which is, in turn a tributary of the Adaja River that emerges from Douro River. Its starts in the mountains of Guadarrama and Malagón. The water from Dehesa de la Cepeda , enclave of the city of Madrid and the Azálvaro Field also flow into the Voltoya . It runs through the Castilian-Leonese provinces of Ávila and Segovia . Its mouth is in Coca (Segovia). The Serones Reservoir, which supplies drinking water to the city of Ávila is located on the Voltoya. Tributaries
Steamboats of the Willamette River Oregon City. (The current Oswego Lake is a larger version of the original lake, formed by a dam on the east end.) The Tualatin River is a tributary of the Willamette River, which runs near to the west end of Oswego Lake, which itself is tributary to the Willamette, draining easterly through Sucker Creek, now known as Oswego Creek. In 1865, John Corse Trullinger established a sawmill driven by an overshot waterwheel on Sucker Creek. At that time, road and other access to the Tualatin Valley was very difficult. The mouth of the Tualatin River was unnavigable, so it was