DENVER (AP).- Federal land managers announced a final decision Monday approving Christo’s art proposal to suspend 5.9 miles worth of silvery, translucent fabric over a stretch of the Arkansas River, with measures aimed at protecting bighorn sheep and other wildlife. Christo’s team still needs permits from two counties, the Colorado Department of Transportation and the State Patrol for the $50 million Over the River project, but construction is expected to start next year. It would be displayed for two weeks in August 2014 before being dismantled. The Bureau of Land Management had said in July its preferred alternative for the project stuck close to what Christo and his late wife, Jeanne-Claude, formally proposed. It’s believed to be the first artwork to receive the agency’s approval through the drafting of an environmental impact statement,