320 



GEOLOGY OF THE DENVEK BASIN. 



the State itself and beyond, along the lines of the great railroads to the 

 east of the Rocky Mountains as far as the Missouri River. 



In the fall of 1888 still another area of coal was opened up, in the 

 valley of Coal Creek, 2i miles below Louisville and 17 miles north- 

 northwest of Denver. The output of this district for that year was 11,726 

 tons, of which tin- Simpson, which began operations in September, yielded 

 11,126 tons. The town of Lafayette is now located here. In this year, 

 also, the Standard mine, in the Erie district, was put in condition to 

 produce heavily, and late in the season the old Welch mine at Louisville, 

 after a long period of comparative idleness, was reopened by a new slope 

 about SIX) yards to the southeast of the old shaft. Since then several new 

 mines have been opened in both the Lafayette and Louisville districts. 



List of mines in the Denver Basin, including worked and abandoned. 



Superior ( 



Northrup Near Canfield 



Star do 



1878, in FoBsetfs Colorado. 

 Abandoned in 1883. 

 Closed in 1884. 

 Worked. 



■ of tin- mines noticed i 



m ai present temporarily closed. 



