Wave Country in Donelson opened Saturday under heightened security, marking the beginning of the summer swimming season.
Police increased patrols for 2012 after several fights broke out when Wave Country opened in the summer of 2011. Several new rules have also been added.
A larger crowd than expected came out last Memorial Day and overran the entrance. Some people jumped the fence, others made their way through the gate without paying.
Six metro police, a supervisor and Metro Parks officers were on hand Saturday to help with crowd control.