1981, when the Beach celebrated its 50th anniversary the Aquathon was resurrected with similar activities and shows to celebrate the Beach’s earlier years. The aquathon was done again at Centennial Beach on July 8, 2006 for the Beach’s 75th anniversary. The 2006 aquathon included activities like sandcastle and sand burying contests, greased watermelon and innertube races, bozo buckets and tug-of war, kayak demonstrations, scavenger hunts, pier tag tournaments, live music entertainment, cartoonist, face painters, balloon artists, a skate challenge, a water polo tournament, and a variety of unique and entertaining water-based performances for all ages. The aquathon of 2006 was all day, from 11am – 8pm. During a significant flood on July 18, 1996, 17 inches of rain caused water levels to rise to the top of the high dive (three meters), contaminating the chlorinated water with river water and storm water. After 2 weeks and 3 days the of waters receded, and the beach was emptied, cleaned and refilled. From 2002–2004 more than 2 million dollars of renovations were put into the beach. Renovations included new concrete decks around the facility, a new circulation system, new lighting and sound systems, new staircases leading to the bathhouses and water play features. On April 22, 2006 Centennial Beach held its first “Bottom-Feeder Ball.” The bottom-feeder ball was a birthday party for the Beach’s 75th anniversary. The bottom-feeder ball was a dinner held at the bottom of the empty quarry. The funds from this event were used to purchase the beach’s slide for the shallow end. The bottom-feeder ball began at 3:30 and had a variety of different types of entertainment that did not end until dark. The bottom-feeder ball had numerous posters for guests to look at, T-shirts to embellish, and the Waubonsie Valley High School Jazz Combo and the Naperville North High School Symphonic Orchestra performed. Guests received a 3-course dinner at the ball and the opportunity to see the bottom of the Beach while it was empty. References Geography of Naperville, Illinois Tourist attractions in DuPage County, Illinois Buildings and structures in DuPage County, Illinois Quarries Quarries in the United States Public Works Administration in Illinois Works Progress Administration in Illinois