BROWNSVILLE - There are only 5 in the world.

Each one is located in Cameron county.

The Army Corps of Engineers says each of those resacas are at risk.  

A report from the Army Corps of Engineers sums up the type of damage that would happen not only to the ecosystem, but to the environment, and the wildlife if the last remaining resacas in the world were to disappear.

The memories date back more than 50 years.

"We would make our fishing pole and it's a straight pin and then we would make our little glass and we would have extra pins so we could go fishing,” says Beatrice 'Chickie' Samano, a Brownsville resident. "We would just sit there at the resaca just hours and hours."

The water isn't naturally occuring,it comes from a pipe that's constantly pumping water into what used to be the resaca.

The dam cut off the water from one end of the resaca to another. effectively killing the natural ecology and animals in and around it.

The impacts of that dam are seen for miles.

What looks like an open field, used to be home to several species, now those species are gone.

Watch the video for the full story.