The Army Corps said that engineers did all the correct research.
They said that they made sure it was safe to dump the waste.
But lawyers discovered that the engineers had researched a different location.
The Army Corps had permission to pump the waste far away from the coast.
But Army Corps officials wanted to save money.
So, they decided to pump the waste onto the surfer's beach and reef.
After four years of fighting in court, the surfers won the legal case.
Army engineers agreed to clean up all the waste they pumped onto the ocean floor.
The waste will be removed but the damage will take a long time to heal.
It will take over 10 years for the reef to repair itself.
The surfers are happy they saved the reef.
They protected the environment.
And now they can continue to surf in clean water.
Riki DeSoto helped lead the protest against what happened to the Arecibo coast.
He believes that surfers are an important part of a coastal community and environment.
"Surfers are affected people. They tell people about contamination, pollution and everything that is happening in the coast and beach.
You know, we are the first ones out there so you got to respect your beach.
You must protect the environment in which you improve yourself.
Surfers should be like soldiers.
Their job is the protection and enjoyment of the beach and the coast."
Do you know what is happening in your local environment?
If there were a problem, would you be willing to fight to save it?
The surfers in Arecibo were.
And today they are ready to fight any environmental battle that comes their way.