Opponents of a Citi Bike station that was dumped in a popular Soho park will file a lawsuit today asking a judge to remove it.

“Why did it have to come to this?” asked Sean Sweeney, of the Soho Alliance. “It’s the intransigence of an arrogant DOT commissioner who has put her and Mayor Bloomberg’s legacy over the interests of parks and art and the common good.”

Residents decided to sue after a demonstration in Petrosino Park failed to spur the DOT to reconsider the placement. “We . . . are confident that this location would withstand a court challenge,” a DOT spokesman said.