La Boquilla Dam

La Boquilla Dam (Spanish: Presa de la Boquilla) is a masonry arch-gravity dam on the Rio Conchos in Chihuahua, Mexico. It was built in 1910 to provide hydroelectricity, irrigation and flood control, and forms Toronto Lake with a capacity of 2.903 cubic kilometres (2,354,000 acre⋅ft).[1] The dam and the nearby town of Boquilla de Conchos are named for the abrupt narrowing of the Conchos valley where the dam was built: boquilla means "nozzle" or "mouth".

La Boquilla Dam
La Boquilla Dam is located in Mexico
La Boquilla Dam
Location of La Boquilla Dam in Mexico
Official namePresa de la Boquilla
LocationSan Francisco de Conchos Municipality, Chihuahua
Coordinates27°32′41″N 105°24′51″W / 27.54472°N 105.41417°W / 27.54472; -105.41417Coordinates: 27°32′41″N 105°24′51″W / 27.54472°N 105.41417°W / 27.54472; -105.41417
Construction began1910
Opening date1915
Dam and spillways
Type of damGravity
ImpoundsRio Conchos
Height (foundation)80 m (260 ft)[1]
CreatesToronto Lake
Total capacity2.903 km3 (2,354,000 acre⋅ft)
Installed capacity25 MW
Annual generation164.6 GWh

Construction began in 1910 and was completed in 1915. The dam has overflowed several times throughout its history, most notably in 1917 and 2008, causing severe flooding downstream.[2]

The power plant at the dam has a generating capacity of 25 megawatts. In 2004 it produced 164,660,000 kilowatt hours of energy.[3]

One demonstrator was killed and another injured in September 2020 during a protest by farmers against sending water from La Boquilla Dam to the United States as stipulated in a treaty signed in 1944 relating to the utilization of waters of the Colorado and Tijuana Rivers and of the Rio Grande. Locals blamed the Mexican National Guard, who responded they did not do it and that the event needed to be investigated.

The National Guard later withdrew from the site.[4]

See alsoEdit


  1. ^ a b Comisión Nacional del Agua (2008). Secretaría de Medio Ambiente y Recursos Naturales (ed.). Estadísticas del Agua en México - Edición 2008 (PDF) (in Spanish). p. 69. ISBN 978-968-817-895-9. Retrieved 8 February 2012.
  2. ^
  3. ^ Carbon Monitoring for Action
  4. ^ "VIDEO: Campesinos se enfrentan y desalojan a Guardia Nacional, se oponen a entrega de agua de presa a Estados Unidos". La Opinión (in Spanish). Retrieved September 9, 2020.