Workers have started construction on the next phase of an 18-mile tourist railroad to run from Virginia City to Carson City.This section of the reconstructed Virginia & Truckee Railway will run 4.5 miles from American Flat in Storey County south to Mound House in Lyon County. Granite Construction is laying the track under a $5.2 million contract. It is expected to be done by June. Work started Monday on the new phase and a groundbreaking ceremony will be Friday.About a mile and a half of track from Gold Hill to the Overman Pit was finished in 2005.The new construction, said …