Disney is taking steps to drain and fill in the abandoned Upstream Plunge pool at River Country. Upstream plunge was a 330,000 gallon man-made pool that featured water slides and boulders for jumping and diving.

River Country was Walt Disney World’s first water park, it opened in 1975 and went on to thrill guests for 25 years, closing at the end of the 2001 season. Since River Country closed the park was abandoned, but not demolished, and it has been slowly decaying in place. The Upstream plunge pool has been filled with stagnant water which would both pose as a hazard and also as a breeding ground for mosquitoes.

Although Disney has not cited concerns with Zika for the reason for filling in the pool, Mickey’s Backyard BBQ is held at Fort Wilderness adjacent to the River Country site, and the pool is likely being filled in for the comfort and safety of guests.