In January 1999, in the wake of a collapse in the Seward Park Housing parking garage, New York City building inspectors suspected there could be a potential flaw in Jessor's "honeycomb" design of the massive garage roof. The roof had been built to support a vast playground/park above, with trees and grass upon hundreds of thousands of pounds of soil. After the collapse on Friday night, January 15, 1999, the New York City Department of Buildings opened an investigation into other Jessor projects to test for durability. The investigation did not turn up any major design flaws, and cited convergence of many elements including several days of warm rain, followed by quick freezing, thawing, and refreezing, along with a stoppage in the drainage system combined with minor cracking of the concrete in the roof and the immense weight above. After a four-year lawsuit, the Greater New York Insurance Company, insurer for Seward Park Housing, lost their nonpayment case to the cooperative, and $18 million for the damages. After the insurer won a subsequent appeal, the insurer and coop settled in 2010 with the coop returning $3.25 million to the insurer.