It was a simple enough plan: in October 2007, the town of Canadice put land that the City of Rochester owned around Hemlock and Canadice Lakes into a conservation district so that the land couldn't be developed, no matter who owned it. | But the move put a minor kink in plans to transfer the land from the city to the state - which would ensure permanent conservation. In short, it invalidated state and city appraisals, which were based on the assumption that the 7,000 acres could be developed. That zoning glitch would have meant a lower value on the land. | Canadice officials have since fixed the law; they held a public hearing on Monday then adopted new zoning for the land. And negotiations between the state and city are progressing. Right now, the parties are trying to reach a consensus on the land's value, says city Corporation Counsel Tom Richards. | Although some residents have worried that the land could be sold for private development, the city hasn't considered doing that, Richards says. | "The best way to treat the property is to preserve it," he says.