 The final hydrant party will be held from 1 to 3 p.m. at the Roosevelt Swim Center parking lot on August 14th. Parks and Recreation Special Events Coordinator Lindsay Myers said, The first hydrant party at Sioux Park was a huge success. It was a hot day, there were a lot of kids, and it's a lot of fun and water to go around. Last summer's hydrant party at College Park was a big success, so we're hoping for another great turnout.