One of Montana's Coal Mines. 



In the mining camps surrounding Helena, development is under way. Much 

 of the gold increase shown by the state the past year or two has come from the 

 mines in that district. Grizzly, Park and Unionville are also noted for their gold 

 mines. 



Magnitude of Botte Mines. 



The mines in Butte are proving richer with depth, thus assuring permanency. 

 It is said that the underground workings of the Butte mines aggregate 2,000 miles. 

 The total depth of all the shafts of the district combined is twelve miles. Nearly 

 all the mines are connected with underground workings and one might travel for a 

 week going through new tunnels and drifts and stopes. Through the shafts of the 

 Butte district are daily hoisted about 18,000 tons of ore. 



In the course of a year the Butte mines used about 100,000,000 feet of lumber 

 and more than 300,000 round timbers for mine props. More than 5,000,000 pounds 

 of dynamite are used each year to break the rock in the mines. 



The mining industry of the state covers a wide area. There are more than 

 30,000 miners at work and the smelters employ more than 6,000 men. 



Production by Counties in 1917. 



According to the report of the United States Geological Survey for 1917, Silver 

 Bow, Jefferson and Lewis and Clark counties are the leaders in the order named, 

 of the mineral producing counties of the state. The table herewith submitted, in- 

 cludes 617 producing mines as contrasted with 513 for 1916. It shows the amount of 

 gold and silver in fine ounces and copper, zinc and lead in pounds. Madison county 

 leads in the number of producing mines, with 103; Lewis and Clark second with 94; 

 Jefferson third with 84; and Silver Bow fourth with 56. 



