The 1980s saw the construction of several more hotels and casinos. The Colorado Hotel (now the Pioneer), The Regency, Sam's Town Gold River (now the Laughlin River Lodge), and The Edgewater opened in the early 1980s. Other investors saw the growth as an opportunity to get in on the action. A second boom resulted in the construction of The Colorado Belle, Harrah's Del Rio, and The Ramada Express (now The Tropicana Express). In 1987, Don Laughlin funded and built the Laughlin Bridge at a cost of $3.5 million. He donated the bridge to the states of Nevada and Arizona. The bridge carries 30,000 vehicles daily. In 1988, a megaresort called the Emerald Resort, that would have been the biggest in southern Nevada, was announced but its first tower was left unfinished due to the junk bond market's collapse in 1990. Only the project's golf course opened and it operated from 1991 to 2005. The Flamingo Hilton, now known as The Aquarius, was built in 1990.