I did a little searching and found this info on Ole River Country. Sorry if it has been posted before.
This water park opened on five acres at a corner of Bay Lake near Cypress Point at Fort Wilderness on June 20, 1976. It was officially opened by Gerald Ford's daughter Susan and was designed to be like the type of swimming hole you'd imagine in a Mark Twain novel. According to Disney press releases, gravity kept the millions of gallons of water fresh in River Country. A giant flexible tube at the mouth of the Ol' Swimmin' Hole opened into Bay Lake and served as a "bladder" as it expanded and contracted to keep the River Country water level six inches higher than the lake. This was accomplished through the use of a special sensor system.
Water from Bay Lake was pumped through the inside of River Country's artificial mountain to the top of the flumes and raft ride at the rate of 8,500 gallons a minute. Following the principle that gravity causes water to seek its own level, the River Country water spilled over the top of the tube back into Bay Lake and provided circulation in the water. There were natural sand beaches underfoot instead of the concrete found at a regular waterpark.
Fred Joerger, who did rock work on attractions such as Big Thunder Mountain and Tom Sawyer Island designed the rocks at River Country and scattered them with pebbles from streambeds in Georgia and the Carolinas.
River Country proved to be very popular and the limited capacity led to many sold out days. The success of the Huck Finn-inspired swimming hole led to the construction of Typhoon Lagoon and Blizzard Beach. So why is it now in Walt Dated World? There are several theories for the closing of River Country. Even though the park was popular during the hot summer months, the majority of the water was unheated. Because of this, River Country would often close for refurbishment in early fall when it became cooler or it would be closed during the middle of the week.
Rising admission prices and the addition of two larger water parks on Disney property may have made many visitors feel that River Country was no longer a good value for the price of a ticket compared to the limited number of things to do there.
Disney tried to rectify this problem in 1998 when it offered what it called the All-American Water Party. This seasonal event celebrated every day as the Fourth of July. Games such as sack races, tug-o-war, and a water balloon toss were offered and Disney characters would dance as a country band played during a "good ol' fashioned barbeque." By 2002, the Water Party was a thing of the past and River Country was listed for the last time in the Birnbaum Disney guide. The events of September 11, 2001 and the resulting decrease in tourism may have also played a part in River Country's demise.
River Country is still in place but is only available for private parties and conventions, not for regular guests. Even then, it is rarely used. There have been rumors that it may reopen someday exclusively for Fort Wilderness guests.
I cant get the pictures to post so here is the link:
http://waltdatedworld.bravepages.com/id220.htm