MINES FAIRPLAY DISTRICT. 



703 



FIG. 15. 



The annexed section shows the relative position of the differ- 

 ent portions of the vein : 

 . 1. Crevice containing lead ore. 



2. Key-rock with crevices on each side. 



3. Opening containing lead ore with loose masses of rock and 

 clay. 



4. Chimney going down to 



5. Second opening. 



6. Galena limestone. 



The vein has not been worked over half the time since its 

 commencement, as frequent stoppages were necessary for the 

 purpose of putting in new pumps and machinery. Work was 

 discontinued here in February, 1876, but it is expected that act- 

 ive operations will soon be resumed. 



Mr. Black estimated that he had taken out about one million 

 pounds of lead ore, at an expense of $40,000. 



Williams & Co. This mining property is situated about 

 three-quarters of a mile northeast of Black's mine, and was op- 

 erated by the proprietors, Messrs. Thomas, and Jeremiah Wil- 

 liams, and Mr. O'Connor. The water in this ground is not 

 nearly so abundant as in the preceding. It is easily removed 

 with a common lift-pump, worked with a ten-horse power en- 

 gine; the amount seldom exceeds 250 gallons per minute. Mining has been confined 



to the upper half of the Galena limestone. The lower clay beds of the Cincinnati group 



are also found here, but there is not so great a thickness of them as at Black's mine. 



The pump shaft commences at the top of the Galena limestone, and is sunk to a depth 



of one hundred and six feet, at which point the 



top of the second opening is found, after passing 



through the first opening, which is situated at a 



depth of forty-seven feet from the surface, and is 



probably identical with the first opening at 



Black's mine, which it much resembles in its gen- 

 eral appearance. The first opening here consists 



of a series of large caves or enlargements of the 



crevice, with chimneys going down to the second 



opening. 

 The ore was found in masses mixed with clay and 



large pieces of stone which had apparently fallen 



from the roof or cap. The Lead ore from its great- 

 er specific gravity usually occupies the lower part 



or floor of the opening. The course of the range 



is very nearly east and west, but bears a little 



north on its western end. The length of drifts in 



the top opening amounts to about nine hundred 



feet. It is about worked out at the western end, 



but still continues good at the east. Several 



masses of lead ore were found in this opening 



weighing from fourteen to fifteen thousand pounds. 



A singular formation of ore was found in the top SECTION OF OPENING IN THE WILLIAMS 



opening, as illustrated in the annexed diagram. 



1. Opening and crevice filled with loose masses of lead ore and rock, mixed with loose 



fine clay and sediment. 2. This is a bench about a foot in width on each side of the opeu- 



