- International Boundary and Water Commission
The International Boundary and Water Commission ( _es. Comisión Internacional de Límites y Aguas) is an international body created in 1889 by the
United States andMexico to administer the many boundary and water-rights treaties and agreements between the two nations.The organization was created as the International Boundary Commission by the
Convention of 1889 , and given its present name under the1944 Treaty . Under these agreements, the IBWC has a U.S. section and a Mexican section, headquartered in the adjoining cities ofEl Paso, Texas , andCiudad Juárez, Chihuahua . The U.S. section is administered by theUnited States Department of State ; the Mexican part by theSecretariat of Foreign Relations of Mexico .Some of the rights and obligations administered by the IBWC include:
*distribution between the two countries of the waters of theRio Grande and of theColorado River ;
*regulation and conservation of the waters of the Rio Grande for their use by the two countries by joint construction, operation and maintenance of international storagedam s and reservoirs and plants for generatinghydroelectric energy at the dams;
*protection of lands along the river from floods bylevee and floodway projects;
*solution of border sanitation and other border water quality problems;
*preservation of the Rio Grande and Colorado River as the international boundary;
*demarcation of the land boundary.The U.S. and Mexican commissioners meet at least weekly, alternating the place of meetings and are in almost daily contact with one another. Each section maintains its own engineering staff, a secretary and such legal advisers and other assistants as it deems necessary.
The border and water treaties
The Guadalupe Hidalgo Treaty of
2 February 1848 fixed the international boundary between El Paso – Ciudad Juárez and the Gulf of Mexico. The Gadsden Purchase Treaty of30 December 1853 extended the southern boundary of New Mexico and Arizona southwards to enable the United States to construct a railroad to the west coast along a southern route and to resolve a question arising from the 1848 Treaty as to the location of the southern boundary of New Mexico. Temporary commissions were formed by these boundary treaties to perform the first joint mission of the governments of the United States and Mexico, which was to survey and demarcate the boundary on the ground in accordance with the treaties. Another temporary commission was created by the1852 Boundary Convention (29 July ), which surveyed and increased the number of monuments marking the land boundary westward from El Paso and Ciudad Juárez. As settlements sprang up along the boundary rivers and the adjoining lands began to be developed for agriculture in the late 19th century, questions arose as to the location of the boundary when the rivers changed their course and transferred tracts of land from one side of the river to the other. The two governments, by the1884 Border Convention (12 November ) adopted certain rules designated to deal with such questions.By the
1889 Border Convention (1 March ), the two governments created the International Boundary Commission (IBC), to consist of a United States Section and a Mexican Section. The IBC was charged with the application of the rules of the 1884 Convention, for the settlement of questions arising as to the location of the boundary when the rivers changed their course. That Convention was modified by theBanco Convention of20 March 1905 to retain the Rio Grande and the Colorado River as the boundary.The
1906 Border Convention (21 May ) provided for the distribution between the United States and Mexico of the waters of the Rio Grande above Fort Quitman, Texas, for the 143-km (89 mile) international boundary reach of the Rio Grande through the El Paso–Juárez Valley. This Convention allotted to Mexico convert|60000|acre feet* (74,000,000 m³) annually of the waters of the Rio Grande to be delivered in accordance with a monthly schedule at the headgate to Mexico's Acequia Madre just above Ciudad Juárez. To facilitate such deliveries, the United States constructed, at its expense, theElephant Butte Dike in its territory. The Convention includes the proviso that in case of extraordinary drought or serious accident to the irrigation system in the United States, the amount of water delivered to the Mexican Canal shall be diminished in the same proportion as the water delivered to lands under the irrigation system in the United States downstream of Elephant Butte Dike.In the
1933 Border Convention (1 February ), the two governments agreed to jointly construct, operate and maintain, through the IBC, theRio Grande Rectification Project , which straightened and stabilized the 249-km (155 mile) river boundary through the highly developed El Paso–Juárez Valley. The project further provided for the control of the river's floods through this Valley.The
Treaty for the Utilization of Waters of the Colorado and Tijuana Rivers and of the Rio Grande of3 February 1944 distributed between the two countries the waters of the Rio Grande from Fort Quitman to the Gulf of Mexico, and the waters of the Colorado River. Of the waters of the Rio Grande, the Treaty allocates to Mexico:
#All of the waters reaching the main channel of the Rio Grande from the San Juan and Alamo Rivers, including the return flows from the lands irrigated from those two rivers.
#Two-thirds of the flow in the main channel of the Rio Grande from the measured Conchos, San Diego, San Rodrigo, Escondido and Salado Rivers, and the Las Vacas Arroyo, subject to certain provisions
#One-half of all other flows occurring in the main channel of the Rio Grande downstream from Fort Quitman. The Treaty allots to the United States:
#All of the waters reaching the main channel of the Rio Grande from the Pecos and Devils Rivers, Goodenough Spring and Alamito, Terlingua, San Felipe and Pinto Creeks.
# One-third of the flow reaching the main channel of the river from the six named measured tributaries from Mexico and provides that this third shall not be less, as an average amount in cycles of five consecutive years, than 350,000 acre feet (430,000,000 m³) annually
# One-half of all other flows occurring in the main channel of the Rio Grande downstream from Fort Quitman.The 1944 Treaty further provided for the two Governments to jointly construct, operate and maintain on the main channel of the Rio Grande the dams required for the conservation, storage and regulation of the greatest quantity of the annual flow of the river to enable each country to make optimum use of its allotted waters. The 1944 Treaty also provides that of the waters of the Colorado River, Mexico is to receive:
# A guaranteed annual quantity of 1.5 million acre feet (1.9 km³) to be delivered in accordance with schedules formulated in advance by Mexico within specified limitations.
# Any other waters arriving at the Mexican points of diversion under certain understandings. To enable diversion of Mexico's allotted waters, the Treaty provided for the construction by Mexico of a main diversion structure in the Colorado River, below the point where the California–Baja California land boundary line intersects the river. It also provided for the construction at Mexico's expense of such works as may be needed in the United States to protect its lands from such floods and seepage as might result from the construction and operation of the diversion structure.In the 1944 Treaty the two Governments agreed to give preferential attention to the solution of all border sanitation problems. This Treaty entrusts the International Boundary and Water Commission (IBWC) (the renamed International Boundary Commission of the 1889 Convention) with the application of its terms, the regulation and exercise of the rights and obligations which the two governments assumed therunder, and the settlement of all disputes to which its observance and execution may give rise. The Treaty also provides that the IBWC study, investigate and report to the Governments on such hydroelectric facilities as the IBWC finds should be built at the international storage dams and on such flood control works, other than those specified in the Treaty, that the IBWC finds should be built on the boundary rivers, the estimated cost thereof, the part to be built by each government, and to be operated and maintained by each through its Section of the IBWC.
Under the terms of the 1944 Treaty: the two Governments reached agreement for the solution of the international problem of the salinity of the Lower Colorado River (
30 August 1973 ), and the IBWC submitted and the two Governments approved "Recommendations for the Solution of the Border Sanitation Problems" (24 September 1979 ).The
Chamizal Convention of29 August 1963 resolved the nearly 100 year old boundary problem at El Paso and Ciudad Juárez. Known as theChamizal Dispute , this involved some 2.4 km² (600 acres) of territory which were transferred from the south to the north bank of the Rio Grande by movement of the river during the latter part of the 19th century. By this Convention the two governments gave effect to a 1911 arbitration award under 1963 conditions. The Convention provided for the relocation of the IBWC of the 7 km (4.4 miles) of the channel of the Rio Grande so as to transfer a net amount of 1,769,200 square metres (437.18 acres) from the north to the south side of the river. U.S. PresidentLyndon Johnson metMexican President Adolfo López Mateos in El Paso on24 September 1964 to commemorate the ratification of the Chamizal Convention.The
1970 Boundary Treaty (23 November ) resolved all pending boundary differences and provided for maintaining the Rio Grande and the Colorado River as the international boundary. The Rio Grande was reestablished as the boundary throughout its 2,019-km (1,254 mile) limitrophe section. The Treaty includes provisions for restoring and preserving the character of the Rio Grande as the international boundary where that character has been lost, to minimize changes in the channel, and to resolve problems of sovereignty that might arise due to future changes in the channel of the Rio Grande. It provides for procedures designed to avoid the loss of territory by either country incident to future changes in the river's course due causes other than lateral movement, incident to eroding one of its banks and depositing alluvium on the opposite bank. This treaty, too, charged the IBWC with carrying out its provisions.ee also
*
U.S.-Mexico border for a detailed treatment of the various conventions and treaties overseen by the IBWC.
*Falcon International Reservoir
*Amistad Reservoir
*New River (California) U.S.-Mexico river, reported as most polluted in North America,External links
* [http://www.ibwc.state.gov/ Official site]
* [http://www.ppl.nl/index.php?option=com_wrapper&view=wrapper&Itemid=82 Bibliography on Water Resources and International Law] Peace Palace Libraryources
:Parts of this article have been adapted from [http://www.ibwc.state.gov/html/about_us.html The International Boundary and Water Commission, Its Mission, Organization and Procedures for Solution of Boundary and Water Problems] , a [http://www.ibwc.state.gov/Files/privacy.htm public domain] publication of the
United States Government .
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