Question: What year wwas the parks first water ride installed?
About the article "Hersheypark", section "The Hollow".

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In the late 1990s, Paramount Parks-owned Canada's Wonderland teamed up with Sally Corporation to develop Scooby-Doo's Haunted Mansion.
The ride opened on May 7, 2000.
In November that year, the ride was recognized as the Best New Children's Ride.
Paramount Parks then installed the ride at three other locations over the coming four years.
In 2002, Six Flags installed the ride at Six Flags Fiesta Texas and Six Flags St. Louis, with the latter using an existing water ride system.
In 2005, Parque Warner Madrid installed the ride (at the time the ride was in the planning stages, the park was operated by Six Flags).
ETF Ride Systems manufactured the trackless ride system used on the Parque Warner Madrid installation.
Following Cedar Fair's acquisition of Paramount Parks, the rides at those locations were re-themed prior to the 2010 season to remove the Scooby-Doo characters.
The move is part of the company's broader move away from Hanna-Barbera characters.
It became "Boo Blasters on Boo Hill", a shooting dark ride themed to a large ghost. 
In the 1890s, he designed (and the Ingersoll Construction Company built) roller coasters - mainly the type now known as "figure eight" coasters like the first one to be installed in Kennywood Park (1902) - and scenic railroads (originally called "Russian Mountains" as the type originated in Europe).
Ingersoll also designed and built another ride that many parks presented as their signature attraction, the Shoot-the-Chutes water ride, a type that has since evolved into the modern log flume that many current parks feature.
By 1901, Ingersoll and his company broadened their scope from designing and building amusement park rides to designing and building amusement parks themselves.
Two early successes, Riverside Amusement Park in Indianapolis and Rocky Glen Park near Moosic, Pennsylvania, were trolley parks designed, built, and opened by Ingersoll by 1903.
With the success of the Ingersoll parks (and that of Coney Island's Luna Park, which opened the same year), Ingersoll conceived of an amusement park chain, featuring establishments both individually and collectively named Luna Park.
By 1904, the Luna Park Amusement Company was formed with investor help. 
In February 2007, roller coaster parts began arriving in Wet'n'Wild Water World's car park.
The Gold Coast Bulletin later reported the ride as being an Intamin Half Pipe roller coaster with an opening date scheduled for the September school holidays.
In late April, Wet'n'Wild Water World officially confirmed this report by announcing the Surfrider.
After a relatively short construction period, the ride was fully assembled by July 2007.
The ride opened in September 2007.
Surfrider was originally planned to be installed at Sea World, a theme park owned by the same company as Wet'n'Wild Water World, Village Roadshow Theme Parks.
After purchasing the ride from Intamin, the location where it was to be installed was changed. 
The film "Lara Croft: Tomb Raider" and subsequent sequel, having been distributed and licensed by Paramount Pictures, were eligible for inclusion in the six Paramount Parks, theme parks owned and operated by Paramount (and later, CBS Corporation).
As such, three "Tomb Raider" rides were opened at various Paramount Parks: "Tomb Raider: The Ride" (both a HUSS Giant Top Spin at Kings Island and a flying roller coaster at Canada's Wonderland) and "Tomb Raider: FireFall" (a suspended HUSS Top Spin at Kings Dominion).
The Paramount Park's sale to Cedar Fair, L.P. was accompanied by a loss of rights to the "Tomb Raider" name, and subsequently, Kings Island's "Tomb Raider: The Ride" and Kings Dominion's "Tomb Raider: FireFall" were renamed "The Crypt", while Canada's Wonderland's "Tomb Raider: The Ride" was renamed "Time Warp.
"With its investments and licensing pulled from the former Paramount Parks, the "Tomb Raider" ride franchise was started anew with "Tomb Raider: The Machine" at Movieland Studios, Italy.
The ride, manufactured by Zamperla, looks very much like the HUSS Top Spin ride, but is more advanced ride called a Windshear.
The original (and only indoor, themed) "Tomb Raider: The Ride" at Kings Island was celebrated for the way it turned what is generally a typical "boring" thrill ride like a Top Spin (something found at most carnivals) into a highly interactive, themed dark ride complete with lava pits, volcanoes, icicles, and a giant goddess carving on the wall with laser eyes.
The ride was synchronized to a specially-made "Tomb Raider" soundtrack and featured the real, six armed "Durga" goddess and water vase from the first movie, as well as the monkey warrior statues that come to life in the film.
The ride was renamed "The Crypt" and all references to Lara Croft were removed due to change in park owners in 2008.
The ride has since been removed. 
Splashin' Safari, the water park Holiday World added in 1993, has consistently ranked among the best water parks in the United States, even being named as the #1 water park in the United States by TripAdvisor in 2011.
The water park takes the general theme of a safari, with ride names featuring various animals, rivers, and Swahili words.
Holiday World has added onto its water park every year from 2002 to 2013.
Among those additions are the world's two longest water coasters: "Wildebeest" and "Mammoth", which are also, respectively, the third and first most expensive additions ever made to the park.
Unlike some other theme parks, entry to Splashin' Safari is included with admission to Holiday World.