"In the spring of 1972, a nonprofit group called Broward Artificial Reef, or BARINC, hatched an idea to build a three-mile reef while at the same time disposing of old tires. The U.S. Army Corps of Engineers endorsed the project; similar ones had been created in the Northeast and Gulf of Mexico."
clik here for article
"But it didn't work."
"Metal clips holding the tires together corroded, and the tires spilled across the ocean floor."
top quote and the link take you to the article. but wow .. the amount of work to make that happen .. and jeez the amount of work to clean it up .. i bet thats going to be a good paying job !