The U.S. Section operates and maintains 14 gaging stations on the main channel of the Rio Grande. The U.S. Section operates and maintains twelve gaging stations on the measured tributaries in its country. In addition, the United States Section operates several gaging stations on United States diversion and return flow channels. The Mexican Section operates and maintains four gaging stations on the main channel of the Rio Grande and eight gaging stations located on measured tributaries in Mexico. The Mexican Section operates and maintains gaging stations located on diversion and return flow channels in Mexico. Each section of the IBWC gages the spring inflows from its side to the river downstream of the International Amistad Dam on the Rio Grande. Also, the United States Section operates 13 gaging stations for flood warning and operation of the flood regulation storage in the International Amistad and Falcon Reservoirs on the Rio Grande.
The data forms the basis for joint accounting by the two sections of the waters belonging to each country. The national ownership of waters has been determined since 1953.
The Water Accounting Division also oversees the operation of ten gaging stations on the Lower Colorado River in association with deliveries of water to Mexico pursuant to the 1944 Water Treaty.
Conversion Table - This link will give you a quick view of Metric to English conversion constants.