SIOUX FALLS, S.D. (AP) — An independent review of the $117 million events center in Sioux Falls has concluded that its flawed siding panels are structurally sound.

But consultants found that the use of flat paneling approved by the city has led to ripples in the siding on the Denny Sanford Premier Center.

Mayor Mike Huether and Public Works Director Mark Cotter shared the results of consultants Simpson Gumpertz & Heger Inc.'s findings during a news conference Friday, the Argus Leader reported .

The flawed paneling was the subject of a city settlement with five construction companies in 2015. Huether's administration late last year approved the hiring of an independent consultant to assess whether the exterior panels are protecting the building's interior.

An earlier forensic report concluded that the flawed paneling wasn't worth replacing, but the report was never made public.

City secrecy surrounding the paneling problems prompted calls from the public, City Council and chamber of commerce for more transparency.

"The most prudent way to finally quell the conversation, the negativity and the naysayers, we felt this would be a good investment," said Huether.

In the report, the consultants said that the use of flat panels led to buckling.

"To avoid this appearance, the panels needed to be precurved," the report said. "The visual appearance of warping, buckling, or bulging at joints is most likely due to the lapped construction of flat metal panels around a curved building."

The report recommended regularly inspecting panels to identify if they need to be replaced. The consultants warned that buckling and warping could worsen.

The consultants will discuss their findings with the City Council later this month.

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Information from: Argus Leader, http://www.argusleader.com