 The Jumbo Asphalt Company established mining operations there and, by 1904, the community was known as Jumbo Mines.By 1905 the company was mining up to eight tons of asphalt per day, which it shipped to Moyers, Oklahoma via a dedicated tram line.The line stretched from Jumbo south through the Impson Valley, rounding the foot of Parker Mountain into Moyers, where it connected with the railhead at the St. Louis and San Francisco Railway.