Due to upstream flood conditions and rising reservoir levels, the International Boundary and Water Commission, United States and Mexico, increased the release of floodwaters from Falcon Dam, located at Falcon Heights, Texas-Nueva Ciudad Guerrero, Tamaulipas on July 8.
Releases into the Rio Grande will be increased to the rate of 39,700 cubic feet per second (1125 cubic meters per second). Releases were initiated July 7 at the rate of 15,000 cubic feet per second (425 cubic meters per second) — the first time flood releases have been made from the dam since 1992. This water will flow downstream into the Lower Rio Grande Valley where the Commission has a system of flood control levees, diversion dams, and floodways. Releases at this rate are well within the capacity of the U.S. portion of the Lower Rio Grande Flood Control Project that extends from Peñitas to the Gulf of Mexico.
Residents in the Rio Grande Basin should continue to monitor National Weather Service warnings and forecasts for any updated information about flood conditions.
The International Boundary and Water Commission began diverting floodwaters at Anzalduas Diversion Dam in Hidalgo County, Texas into the U.S. interior floodway early on July 8. The volume of water diverted into the interior floodway will continue to rise throughout the day.
Diversions into Mexico’s interior floodway at Retamal Dam have also begun.
The U.S. interior floodway includes channels known as the Banker Floodway, Main Floodway, North Floodway, and Arroyo Colorado through portions of Hidalgo, Cameron, and Willacy Counties. The last time the International Boundary and Water Commission diverted water into the U.S. floodway was in 1988 due to the effects of Hurricane Gilbert.