Humbarger Construction Company, Newfound Gap Road Construction, circa 1933-1934Great Smoky Mountains National ParkHumbarger Construction Company, Sugarlands Carts used to haul rock, mule-drawn; carts also used in tunnel construction to remove earth. Wagons painted green. Vol. of cart= 1 cu. yd. Mule barn located at Walker Prong. Photograph from US Bureau of Public Roads.Newfound Gap Road Construction, II-R-Const-4307, Physical Facilities - Roads - Construction of Roads