As some of you know, I am attempting to model the CNW in Mankato MN. The ballast used by the CNW and Omaha Road is pink in color and hard to duplicate. Anyone from around here would immediately recognize the color of the correct ballast. I have found that Arizona Rock and Mineral has the color that I'm looking for. The ballast is sold in 12 oz. bags for $4.30 with a minimum order of six. The shipping is a flat thirteen dollars and will hold twenty four bags. I'm hoping to guess how much I'm going to need for my layout. Does anyone have any experience with coverage rates for this product? How many feet of track could a person expect to cover? I'm planning on using their HO fine scale size. I don't need exact amounts, just a ball park figure of how far a bag of this stuff will go. Any and all help will be greatly appreciated.