EARLY BIRD DISCOUNT!! Sign up by May 27, 2016 to buy your Family Aquatic Center season pass @ 2012 prices. These prices go up to 2016 pricing on May 28. To sign up, call Sophie or Linda at city hall 563-539-2355, Mon. - Fri. (office closes 4 p.m.). Print the form below directly from this website. Have fun this summer!