DUBLIN — A third of the six slides at the city’s new $43 million water park, The Wave, was closed Sunday as city and state officials investigate after a boy was launched from a three-story water slide, landing on the concrete exit next to the ride, at the park’s grand opening Saturday. The translucent flume gives spectators a great view of riders zipping through the slide.” 
 
 The 10-year-old boy who was thrown from the Emerald Plunge slide on Saturday was “just shaken up” and had a scratched shoulder that was treated by first-aid workers, a park spokeswoman said after the incident was witnessed and recorded by a Bay Area News Group photographer covering the opening of the park. The photographer saw scratches on the boy’s back, before he walked away on his own power and was helped by a lifeguard and city employee shortly after noon Saturday. The slide from which the boy fell, which is called the Emerald Plunge, as well as a similar slide adjacent to it called the Dublin Screamer remained closed on Sunday as staff from the city of Dublin and California’s Division of Occupational Safety and Health Administration try to determine what caused the boy to fly off the slide and assess the safety of all the park’s slides. Related Articles Video: Child thrown from slide on East Bay water park’s opening day 
 
 Peterson: Rider flung from slide, dampening Dublin’s The Wave debut 
 
 What you need to know if you’re going to the Wave water park in Dublin this weekend Dublin Assistant City Manager Linda Smith said on Sunday that the park closed a third slide, called the Riptide Rider, because staff was re-examining that ride’s water pressure. “I was worried if he was mentally OK, but physically he just had some scrapes.” 
 
 Park officials shut down the slide, as well as adjacent slide “Dublin Screamer,” and contacted manufacturer WhiteWater West Industries to have them come out and assess the slide. The East Bay Times reported that the incident happened around noon when the boy was thrown out of the Emerald Plunge water slide and landed on the concrete. According to park officials, riders are supposed to cross their arms and legs when going down the slide and the boy’s legs were apart. The description of the Riptide Rider slide on the park’s website reads: “Get ready to fly and swirl down seven stories of fun. The facility, located by Dublin’s Emerald Glen Park, also has three pools, a water playground and a 2,000-seat outdoor performing arts center. The facility is expected to employ nearly 200 seasonal employees and will cost about $2.5 million to operate in its first year. Staff writer Matthias Gafni and staff photographer Jose Carlos Fajardo contributed to this report.
– It was a rocky opening day at a $43 million California water park after a 10-year-old boy careened off a water slide and hit the pavement. Miraculously, the boy was "just shaken up" after he sailed from the tube Saturday at The Wave park in Dublin, a park rep tells the East Bay Times. A harrowing video, per KRON, captures the moment the boy catapulted from the Emerald Plunge. Luckily, he was near the bottom of the three-story slide when he slapped down on concrete. "He got up immediately … and was stunned," eyewitness Linda Smith, the assistant city manager, tells the Times. "I was worried if he was mentally OK, but physically he just had some scrapes." The boy's parents declined medical attention at the scene. Park officials closed the slide and two others while authorities investigate, including one called the Dublin Screamer, which boasts a "heart-pounding near vertical drop," per the park's website. Three of the slides remained open. The steepest slides are fully enclosed, but the Emerald Plunge has open sides and promises "a splash you'll never forget." Riders must be 48 inches tall and are told to cross their arms and legs. Park officials say the boy's legs were open, but the Mercury News counters that they appear closed. “We’re not going to open it until we know what happened,” Smith says of the slide. (A boy's death closed the world's tallest water slide.)