St. Louis County Council members approved a controversial treetop adventure course in Creve Coeur Park Tuesday night. 

That's according to the Twitter accounts of St. Louis Post-Dispatch's reporter Steve Giegerich and KMOX reporter Allison Blood. 

Many St. Louis-area residents were unhappy about the proposed zip-line-based course and made a last-ditch attempt to stop the project by organizing opposition during Tuesday's county council meeting.

The park will open in May and be built by a company called Go Ape!, a Maryland-based company that has created similar parks in Indiana, Virginia and Maryland. 

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Read also: Residents React to Zip-Line Course at Creve Coeur Park

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According to Blood's Twitter feed, the project passed on five yes votes and one no vote with one council member absent.

On Monday, the Maryland Heights Residents for Responsible Growth released a statement that urged residents to speak up for the park and against the adventure course. The organization was upset that county council members moved the adventure course from a Wildwood park to Creve Coeur Park without involving the public among other issues. 

The St. Louis Audubon Society also had objections to the park, saying the park would threaten the fragile wildlife and bird habitat being restored there.

Those concerns, apparently, fell on deaf ears as the council proceeded with plans to build the course. 

According to Go Ape!, a treetop adventure course is an outdoor experience that allows participants to explore the park from an otherwise unobtainable vantage point while navigating through the treetops using zip lines, obstacles and tarzan swings.

Go Ape! also says a portion of every ticket goes back to the park department its partnering with.