MINES OF BULL HILL. 
365 
high, 20 feet east and west, and about 30 feet north and south was stoped out, 
furnishing about $6,000 of $30 to $40 ore without sorting. One of the flat quartz 
seams was reached at the bottom of this chamber, and the values extended only 
a few inches below it. In the shaft, however, the quartz seam was not recognized, 
probably having pinched out, and there the shoot continued down as above. About 
60 feet from the surface it widened out toward the west. At 70 feet the second 
flat quartz seam was reached and the values went only a foot or two below it. 
Ore was stoped out 20 feet above the quartz seam for a width of 20 feet. About 
25 feet west of the shaft a vertical quartz seam was encountered. This seam 
formed the western limit of the ore, but at the junction of the flat and vertical 
veins a small pocket of rich ore was opened toward the south. All the ore from 
this intersection gave returns of $500 per ton and a small shipment assayed 500 
ounces. This intersection was stoped for 20 feet, and the vertical vein carried 
values for 14 feet below the flat vein; then pay ore gave out. 
The central part of this ore body averaged $30 per ton as broken, and the coarser 
wall rock, running $12 to $15, was also mined and shipped. 
A little ore was taken from the 300-foot level, but this was inaccessible at the 
time of visit, and the mode of occurrence was not ascertained. 
BOGART MINE. 
Adjoining the Sheriff mine on the northwest is the Bogart mine of the Mountain 
Boy Gold Mining Company. It has not been worked for some time and was not 
examined. The shaft is 260 feet deep and the workings expose the basalt dike 
which enters the Sheriff ground. Ore is said to have been found where this dike 
splits, and $13,000 was taken from two pockets, the ore averaging $30 to $40 
per ton. 
HAPPY YEAR MINE. 
The Happy Year mine is a short distance north of the Bogart, and contains 
what is without doubt the same basaltic dike. The shaft, which is said to be about 
500 feet deep, is in granite, but most of the workings were inaccessible. A tunnel 
farther down the hill follows the basalt dike and cuts the shaft at about 200 feet. 
The dike is much decomposed, varies from 6 to 30 inches in width, and is about 
vertical. Just north of the shaft a second basalt dike is seen a few feet west of 
the first and nearly parallel with it. The two dikes are said to come together 
above and at the junction to have made a considerable body of ore of rather low 
grade. About 100 feet southeast of the shaft the approximate contact of granite 
with breccia is seen. Both rocks are much altered and the contact is not at all 
sharp. The first-mentioned basalt dike is drifted on perhaps 300 feet south- 
southeast from the shaft. The production of the mine was not ascertained. 
NEW YORK TUNNEL. 
The portal of the New York tunnel, which penetrates Bull Hill, is situated 
at an elevation of about 10,100 feet, close to the eastern branch of Squaw Gulch, 
about 1,800 feet southwest of Midway. The tunnel is 1,500 feet long, with a direction 
of S. 65° E. The rock is granite, but is much shattered and in places holds fragments 
of volcanic material. Several kaolin-filled fissures and seams have been encountered 
and some of them have been drifted on, but, it is stated, without success. 
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