QUARRIES IN HANCOCK COUNTY. 109 
Mr. Oren, United States inspector of building stone for Govern- 
ment contracts, stationed at Stonington in 1005, stated to the writer 
hat be had tested this granite by immersing it in commercial hydro- 
chloric acid for over three months without any bad effects. 
The (jiiaiTw opened in 1900, consists of two openings, one near the 
op of the hill, 500 by 400 feet and from 10 to 18 feet in depth, the 
)ther on its west side, 600 b\ <"»() feet and up to 14 feet in depth. 
drainage requires occasional pumping. There is little or no stripping. 
Rock structure : The sheets, from 6 inches to 16 feet thick, dip 10° to 
L5° north and south away from the top of the hill. Joint courses are 
shown in fig. 19. A occurs but once; B recurs at intervals of 500 feet. 
Fhe rift is vertical with a course of N. 60°-65° W. There are granite 
likes from 4 to 12 inches thick. (See description on p. 46.) Knots 
ire rare and small. Pyrite occurs but very rarely. 
The plant consists of 9 derricks and 3 engines, 1 traveling crane of 
10 tons' capacity, 1 locomotive, 2 compressors each of 750 cubic feet 
•apacitv, ir> steam or pneumatic drills, 9 surfacers, 19 pneumatic 
)lug drills, 8 pneumatic hand tools, and 2 steam pumps. 
Transportation is effected by locomotive and 2,500 feet of track. 
Fhe distance from upper quarry to cutting shed is 1,000 feet, and 
Prom cutting shed to wharf 600 feet. 
The product is used for massive structures in New York and Nor- 
folk, Va. The small sheets and waste are used in paving. Specimen 
Structures: The approach to Williamsburg Bridge and the piers to 
Manhattan Bridge, New York. Contracts in 1905: Retaining wall 
for Riverside Drive, New York, and the dry dock in Norfolk, Va. 
Hagan and Wilcox quarry is on Deer Isle, in Stonington village. 
Operators, Hagan and Wilcox, Stonington. 
The granite is a coarse-textured, even-grained biotite granite like 
:hat of Green Island. 
The quarry has two nearly adjacent openings, one 75 by 75 feet, 
:he other 50 by 50 feet, and from 25 to 50 feet deep. Drainage is 
Effected by occasional pumping. 
Rock structure: The sheets, from 2 to 20 feet thick, are horizontal. 
Vertical joints, striking N. 80° E., recur at intervals of from 2 to 40 
feet and also N. 20° W., recurring at intervals of from 10 to 20 
feet. The rift is vertical, with course N. 30°-35° W. From the 
■onall spacing of its joints, this is technically a " bowlder quarry." 
The plant consists of 3 derricks and 3 hoisting engines, 2 steam 
drills, and 1 pump. 
Transportation is effected by cartage 1,000 feet to wharf. 
The product is random stone, which is shipped to Philadelphia and 
cut there. Structure: A lace mill in Philadelphia. 
The Calvin Ames quarry is on Deer Isle, 1 mile east of Stonington. 
Operator, Calvin Ames, Stonington. 
