What promises to become a major tourist asset for Iowa is still on track to open in a little over two months. The National Mississippi River Museum and Aquarium will open in Dubuque on June 28th. It’s the lead project in the city’s 188-million dollar river renaissance effort. Jerry Enzler, executive director of the museum and aquarium, says the museum will highlight cultural and natural river history, while the aquarium will be home to thousands of fish, and other creatures like alligators, otters and birds.Annual attendance is predicted at 200-thousand. Enzler says admission prices will range from three-75 to eight-75. He says anyone who can’t afford the admission price will get in free.