It is the most spectacular artificial reef off Fort Lauderdale. Just 1.5 miles offshore, off Hallandale to the north, near the Dade/Broward County line, these old oil rigs privides a unique and popular dive site. Sunk in 1985, the five sections are former oil drilling platforms, the second reef established and donated by the Tenneco Oil Company (the first is 22 miles southeast of Pensacola). The reef consists of two complete production platforms previously situated 75 miles southwest of Morgan City, Louisiana as well as the drilling deck of another platform that was 90 miles southwest of the city. Tenneco brought the towers 920 miles by barge, around the Florida Keys. The structure weighs more than 912 tons and has a total surface area of 100,000 square feet. The tiers are completely covered by a vast array of sponges, gorgonians and invertebrates. The brilliance of all the colors makes for some spectacular photographs. The three sections within safe diving limits lie at a depth up to 115 feet, rising to within 65 feet of the surface and range in size from 25 to 40 feet. Most divers plan a multilevel profile to get the most out of the site. Bull sharks, amberjacks and other large fish are seen in virtually every dive. It's also a great night dive, thanks to the abundant marine life and abundant coral growth.