A school playground on the Upper West Side was shut down on Wednesday after wet concrete fell from a contested 668-foot condo project that has since been slapped with a partial stop work order.

A spokesman for the city's Department of Buildings said that the agency responded to the P.S. 199 playground at West 70th Street between Amsterdam and West End Avenues after receiving a call on Wednesday afternoon from the safety manager for the condo project at 200 Amsterdam Avenue who said that wet concrete had splashed onto the site.

DOB investigators later observed small spots of wet concrete splatter around the park. The investigation is still ongoing, but any work above 40 stories on the side of the building that borders the playground has been prohibited. The DOB said it issued three violations to the general contractor Pavarini McGovern LLC, and a single violation to the concrete subcontractor, RNC Industries LLC, for "their failure to properly safeguard the construction site."

This is not the first time construction material has fallen from the 200 Amsterdam project. In April, Lincoln Towers, a neighboring apartment complex, closed access at one of its entrances after a nine-foot-long wooden board fell from the 26th floor of the building under construction.

The DOB said it had not received any reports that anyone had been struck by the wet concrete.

However, an unnamed father of a PS 199 student told the West Side Rag that his son and his son’s friends were in fact hit by debris while they were in the playground during recess.

“This is troubling given the threat to the health and safety of PS 199 students and sounds eerily familiar given the previous issue 200 Amsterdam Avenue had with falling debris into the Lincoln Towers driveway,” the father told the paper. “It is a real shame because the kids won’t be able to use the playground and have recess. I am a Lincoln Towers resident and feel that this building has been a total hazard during construction.”

The playground is used as the dismissal grounds for P.S. 199. On Wednesday afternoon, parents were notified about changes in dismissal due to "maintenance" in the park. But on Thursday morning, another email from the school principal, Louise Xerri, said that the playground was closed "due to safety concerns stemming from construction behind the basketball court area."

Community and civic groups along with elected officials have for years opposed 200 Amsterdam, which began construction in 2017, for being out of scale with the neighborhood. The project, developed by SJP Properties and Mitsui Fudosan, is currently the tallest building on the West Side north of 61st Street.

The Municipal Art Society of New York and the Committee for Environmentally Sound Development sued the city and developer in a proceeding known as an Article 78 last year, arguing that the developer's amassing of air rights relied on an illegal assemblage of thinly connected lots. After a state Supreme Court judge ruled that the matter should go back to the city, the Board of Standards and Appeals in June voted to uphold the zoning approval. In July, the two civic groups filed another lawsuit to challenge that decision.

In a statement to the West Side Rag, SJP Properties described the debris as "concrete dust" and attributed the accident to a "gust of wind" that sprayed the material through a safety netting. The statement continued: "While it was harmless, our construction manager and site safety director immediately contacted DOB to alert them of the matter. We have stopped all exterior work on the building while we implement additional safety measures to be approved by DOB. As we near the completion of the project, safety at and around the development site is and will continue to be our top priority.”

Reached for comment, Manhattan borough president Gale Brewer criticized the contractors, saying, "I wish contractors would pay more attention to safety on their construction sites.

She added: “I don’t know—it’s probably unknowable—whether the contractor has rushed their construction schedule to avoid various legal challenges over its gerrymandered lot. I understand the B.S.A. has ruled in their favor, and that they are allowed continue construction despite Article 78 proceedings, but they should not be compromising safety in favor of expediency.”