- Get Involved
BANCOS OF THE RIO GRANDE
BANCOS OF THE RIO GRANDE. A 1905 treaty between the United States and Mexico called for the elimination of bancos. A banco is a curve in a river channel, a bend oftentimes resembling a horseshoe or oxbow. Some are so large as to be unnoticeable except from the air or by surveys. Bancos usually form where the ground is level, the drop or grade is slight, and the river is sluggish. During floods, since the water encounters resistance in these curves, the channels frequently shift. Where the Rio Grande is the boundary between the United States and Mexico the shifts have had international repercussions. Boundary commissioners described the Rio Grande border as having three divisions. From El Paso to Rio Grande City, the fall was steep and the banks usually solid. From Rio Grande City to the Gulf of Mexico, a straight distance of 108 miles, the river meandered through 241 miles of curves (bancos) to reach the coast. The soil was alluvial, the fall measured in inches. River channels frequently twisted back upon themselves, creating cut-offs and confusions about where the border was. By 1970 American and Mexican boundary commissions had sliced through 241 bancos by straightening the river. Those bancos that protruded into Mexico went to Mexico, the others to Texas. More than 30,000 acres of land changed hands, most of it in the lower Rio Grande valley. The United States got 18,505 acres, and Mexico received 11,662.
BIBLIOGRAPHY:International Boundary and Water Commission, Files, El Paso. Jerry E. Mueller, Restless River (El Paso: Texas Western Press, 1975). Charles A. Timm, The International Boundary Commission (Austin: University of Texas Press, 1941). Robert M. Utley, International Boundary: United States and Mexico (Santa Fe: National Park Service, Southwest Region, 1964).
Image Use Disclaimer
All copyrighted materials included within the Handbook of Texas Online are in accordance with Title 17 U.S.C. Section 107 related to Copyright and “Fair Use” for Non-Profit educational institutions, which permits the Texas State Historical Association (TSHA), to utilize copyrighted materials to further scholarship, education, and inform the public. The TSHA makes every effort to conform to the principles of fair use and to comply with copyright law.
For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml
If you wish to use copyrighted material from this site for purposes of your own that go beyond fair use, you must obtain permission from the copyright owner.
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article.Handbook of Texas Online, Leon C. Metz, "BANCOS OF THE RIO GRANDE," accessed February 19, 2019, http://www.tshaonline.org/handbook/online/articles/rnb08.
Uploaded on June 12, 2010. Published by the Texas State Historical Association.