Tonto River
Encyclopedia
The Tonto River is a river of Oaxaca
Oaxaca
Oaxaca , , officially Estado Libre y Soberano de Oaxaca is one of the 31 states which, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided into 571 municipalities; of which 418 are governed by the system of customs and traditions...

, Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 that flows from the mountains of Zongolica
Zongolica
Zongolica is a municipality located in the south zone in the State of Veracruz, about 100 km from state capital Xalapa. It has a surface of 63.34 km2. It is located at...

. It is dammed by the Miguel Alemán Dam
Miguel Alemán Dam
The Miguel Alemán Dam is on the Tonto River in the Papaloapan Region of Oaxaca state in southern Mexico, just upstream from the town of Temascal or Nuevo Soyaltepec, forming the Miguel Alemán Lake with an area of 47,800 hectares....

 near the town of Temascal or Nuevo Soyaltepec
Temascal or Nuevo Soyaltepec
Temascal or Nuevo Soyaltepec is the main town and seat of San Miguel Soyaltepec a municipality in the state of Oaxaca.It is part of the Tuxtepec District of the Papaloapan Region....

, forming the Miguel Alemán Lake.
Below the dam, the river flows southeast past San Juan Bautista Tuxtepec
San Juan Bautista Tuxtepec
San Juan Bautista Tuxtepec , or simply referred to as Tuxtepec, is the head of the municipality by the same name and is the second most populous city of the Mexican state of Oaxaca....

, where it joins the Santo Domingo River
Santo Domingo River (Oaxaca)
The Santo Domingo River in Oaxaca state, Mexico is one of the main tributaries of the Papaloapan River, rising in the Sierra Madre de Oaxaca and flowing east towards San Juan Bautista Tuxtepec, above which it joins with the Valle Nacional River to form the Papaloapan.Carrying sediment from the...

 to form the Papaloapan River
Papaloapan River
The Papaloapan River is one of the main rivers of the Mexican state of Veracruz. Its name is derived from the Nahuatl papalotl and apan ....

.
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