From 1927 through May, 1939, approximately 2,293,000 tons of ore from the Tererro Mine were loaded on an aerial tramway and transported 12 miles to the El Molino mill located along Alamitos Creek near Pecos, New Mexico. This ore was refined to produce more than 440,000,000 pounds of zinc; 138,000,000 pounds of lead; 19,000,000 pounds of copper; 5,000,000 ounces of silver; and 178,000 ounces of gold. It was one of the better multiple ore producers operating in the United States from the late 1920s through the 1930s