PROVO, Utah (AP) — Utah's Sundance Mountain Resort has announced plans to add one of the longest zip line tours in the country. Resort officials say construction is scheduled to begin in September on the 2-mile zip line tour, which will offer a vertical drop of over 2,100 feet, the nation's largest such drop. They say when opened to the public in 2015, it will be the longest zip line tour in Utah and the third longest zip line tour in the U.S. Sundance ZipTour will offer four individual zip line spans.Read more on NewsOK.com