They TMre shallow bodies of water that have historic, geological, and aesthetic purposes.
Resacas are a Brownsville staples that are found throughout the community, including back yards.
They are former portions of the Rio Grande that have since been cut off and dried up.
A new contest is aiming to help residents show their appreciation and love for these former river beds.
This morning, Ryan Greenfeld with Brownsville PUB explained how you can participate.