Boy injured in fall on opening day for Dublin water park

A man goes down the Emerald Plunge slide at The Wave water park on Saturday, May 26, 2017 in Dublin, Calif. A man goes down the Emerald Plunge slide at The Wave water park on Saturday, May 26, 2017 in Dublin, Calif. Photo: Amy Osborne, Special To The Chronicle Photo: Amy Osborne, Special To The Chronicle Image 1 of / 57 Caption Close Boy injured in fall on opening day for Dublin water park 1 / 57 Back to Gallery

A 10-year-old boy was injured Saturday after flying off a three-story slide on opening day for a Dublin city water park, officials said.

The incident occurred at about noon at The Wave, 4201 Central Parkway. The boy was going down the Emerald Plunge slide when he suddenly fell out at the bottom of the slide, landing on slide’s concrete wash out area. The slide, and another with a similar drop, were immediately closed, said Linda Smith, the assistant city manager in Dublin.

“I happened to be standing there. I’m a parent and it was not something you want to see happen,” Smith said. “He immediately hopped up and seemed a little stunned, obviously.”

The boy, whose name was not released, sustained scraped and other minor injuries and appeared to be sore, Smith said.

The boy was taken to a first aid tent and his parents chose to take him to the hospital for an examination as a precaution, Smith added.

The police and fire department were not called to the scene.

The Emerald Plunge is a long, open slide that shoots straight down at an 80-degree angle into a splashdown lane.

The Dublin Screamer, a similarly steep slide, was also closed after the incident “out of an abundance of caution,” Smith said.

“We’ve been testing these slides before we put them into operation,” Smith said. “We are still trying to look into what could have contributed to that occurring.”

The $43 million park, which opened its door to over 700 people Saturday, has six water slides, a children’s play pool area, an indoor pool and a sports facility pool. The operating cost of the park in its first year is projected to be $2.5 million, Smith said.

The two slides that were closed Saturday each have a height requirement of 40 inches. They will not reopen until the cause for the boy’s fall is known, Smith added.

“Safety is our top priority here,” Smith said. “We are going to make sure before that facility opens that we know the cause and hopefully we can get that answered before the end of this weekend.”

Sarah Ravani is a San Francisco Chronicle staff writer. Email: sravani@sfchronicle.com Twitter: @SarRavani