On vacation from Lincoln, Nebraska, with her friend Melanie Gocke and her friend's family in August 2016, Sanford, then a rising high school junior, didn't know anything about Schlitterbahn Kansas City. The park, which had been open since 2009, was the first effort outside of Texas for Schlitterbahn, the family-run water-park dynasty that's become the world's preeminent aquatic amusement giant, with its original park wi