The Bureau of Land Management Sierra Front Field Office is seeking public review and comment on the United Comstock Merger Mill at American Flat Environmental Assessment during a 45-day comment period from Dec. 5 through Jan. 19, 2013. The millsite near Gold Hill, is commonly known as American Flat and was the largest concrete mill in the United States when it was built in 1922In 2008, an audit by the Department of the Interior, Office of Inspector General found the American Flat Mill site to be a high liability public safety hazard. This EA analyzes the effects of the Proposed …