90 ECONOMIC GEOLOGY OF AMITY QUADRANGLE, PA. 
Allison, Boon, Blanche, Eclipse, Anderson No. 2, and Nottingham. 
The Manifold and Ellsworth mines are operated by shafts, Rich I lill 
and Meadowlands by slopes, and the rest by drifts. In addition to 
those named, the Enterprise mine, north of Washington, was formerly 
operated by a slope on the south side of Chartiers Creek and a 150-foot 
shaft at a point midway between the slope and Washington, but this 
mine is now abandoned. On the northwest bank of Chartiers Creek 
are situated the Rich Hill mine of the United Coal Company, the 
Meadowlands No. 1 of the Meadowlands Coal Company, and the Alli- 
son of the Pittsburg Coal Company. These mines are working a large 
area in Chartiers Township. The Boon mine at Canonsburg, the 
mouth of which is off the quadrangle northeast of Houston, also 
reaches inside the area. One mile south of Meadowlands, on a spur 
of the Pennsylvania Railroad recently built to it, is situated the 
Manifold mine, operated by the Patterson & Robbins Coal Company. 
Here two shafts have been sunk to the coal, 236 and 231 feet deep, 
respectively. 
In the northeast corner of the quadrangle, on Peters Creek, are 
located the Blanche, Nottingham, and Eclipse mines of the Pittsburg 
Coal Company. These are operated by drifts. The old Anderson 
mine is located here, but is now abandoned. The Anderson No. 2 is 
being operated south of the creek. 
On Pigeon Creek above Bentleyville are collieries Nos. 1, 2, 3, and 4 
of James W. Ellsworth lV: Co. The coal is here deep below the surface 
and is reached by two shafts at Ellsworth and two at the village of 
Three and Four, 2^ miles farther up the creek, on South Branch. The 
shafts are 261, 279, 397, and 414 feet deep, respectively. This com- 
pany is carrying on extensive operations and has built up-to-date 
plants and mining towns. Coal is shipped by means of a branch of the 
Pennsylvania Railroad running down Pigeon Creek and connecting 
with the main line ai Monongahela City. 
Opposite the Chestnut street station of the Pennsylvania lines at 
Washington a shaft was sunk many years ago to the Pittsburg bed. 
The coal was reported to be of excellent quality, but the shaft was 
abandoned on account of the extra expense involved in sinking the 
escape shaft. 
THICKNESS. 
The following table shows the average thicknesses of the coal in 
the various mines, together with the maximum and minimum meas- 
urements in each mine, in inches: 
