PEIMARY LEVELING . 93 
CARROLLTON, SOUTH VIA LIMESTONE TO NEW YORK-PENNSYLVANIA STATE LINE. 
Feet. 
South Carrollton, 1.2 miles south of, iron highway bridge crossing Allegheny River, on bridge 
abutment 8 feet from southeast corner; chiseled square 1, 397. 23 
South Carrollton, 2 miles south of, 4 miles north of Limestone, in large bowlder nearly buried 
in ground on west side of road, between it and ditch, near entrances to pasture fields on 
each side of road; copper bolt stamped "1410 Ft. S " 1,405.718 
Limestone, 2 miles south of, 9 feet from southwest corner of iron bridge over stream just 
inside State line, in stone abutment; chiseled square 1,413.47 
Limestone, 2.3 miles south of, on west side of road, near oil derrick, opposite telephone pole 
6050, on top of State-line monument; chiseled square 1,450. 83 
KILLBUCK, NORTHEAST TO GREAT VALLEY, THENCE EAST TO HUMPHREY. 
Killhuck, 3.9 miles north of, at southwest corner of iron bridge across Wrights Creek at about 
0.25 mile above its junction with Great Valley Creek, in stone abutment; copper bolt 
stamped " 1456 Ft. S " 1,451.923 
Great Valley, 2.52 miles southeast of, northwest corner of iron bridge across Wrights Creek, 
near a white church, on stone abutment; chiseled square 1, 513. 61 
Humphrey, 1.7 miles west of, 4 feet from southeast corner of iron bridge across 
Wrights Creek, on stone abutment; chiseled square 1, 548. 98 
Humphrey, W. J. Sherman's hotel, in stone doorstep in front of porch, west side; copper 
bolt stamped " 1626 Ft. S " 1,621. 444 
CATTARAUGUS AND CHAUTAUQUA COUNTIES. 
CHAUTAUQUA, CHERRY CREEK, CLYMER, DUNKIRK, JAMESTOWN, NORTHEAST, REDHOUSE, 
AND WESTFIELD QUADRANGLES. 
The elevations in the following list are based upon an aluminum tablet in the water 
table of St. Mary's Home and School at Dunkirk, the elevation of which is now accepted 
as 598.937 feet above mean sea level. A portion of the work here given was previously 
reported in the Appendix to the Twentieth Annual Report of the Director United States 
Geological Survey, pages 310-313. For additional elevations on Cherry Creek and Redhouse 
quadrangles see " Precise leveling." 
The leveling on Dunkirk, Cherry Creek, and Westfield quadrangles was done in 1898 
under the direction of Mr. Frank Sutton, topographer, by Mr. E. L. Faison, levelman; 
that on Clymer, Chautauqua, and most of Jamestown quadrangles was done in 1902 under 
the direction of Mr. A. C. Roberts, topographer, by Mr. G. M. Dimmick, levelman, except 
part on Chautauqua quadrangle done by Mr. Win. Kelley, levelman; and work on Red- 
house and the remainder on Chautauqua quadrangle was done in 1903 under the direction 
of Mr. W. H. Lovell, topographer, by Mr. Geo. Seidel, levelman. All standard bench 
marks are stamped with "D" or "DUNKIRK" in addition to figures of elevation. 
DUNKIRK QUADRANGLE. 
DUNKIRK TO FREDONIA, ALONG THE DUNKIRK, ALLEGHENY VALLEY AND PITTSBURG 
RAILROAD. 
Feet. 
Dunkirk, extreme northwest corner of Nelson block; top of water table 588. 866 
Dunkirk, Elk street crossing of Lake Shore and Michigan Southern Railway; top of rail 594.6 
Dunkirk, 2 miles south of, Dunkirk, Allegheny Valley and Pittsburg Railroad culvert No. 3; 
extreme north-west corner 664. 37 
Fredonia, in front of Dunkirk, Allegheny Valley and Pittsburg Railroad station; top of rail. 767.8 
FREDONIA, VIA LAONA, LILLYDALE, CASSADAGA, AND STOCKTON, TO MAYVILLE. 
Laona, on west side of railroad bridge over Canadaway Creek, in top stone of north abut- 
ment; bronze tablet stamped " 817 D " , 817. 926 
Lillydale, 1.5 miles north of, southwest corner of abutment, south end of Skidmore viaduct; 
chiseled square 1, 295. 60 
Lillydale, in front of Dunkirk, Allegheny Valley and Pittsburg station; top of rail ] , 312. 9 
Stockton, 500 feet west of Chriss's Hotel, east side of stone foundation of blacksmith shop 
on Mayville street, 4 feet above ground; bronze tablet stamped " 1316 D " 1, 317. 521 
Mayville, at Jamestown Junction, west side of cemetery, highway bridge over Black Brook, 
in top stone at north end of east abutment; bronze tablet stamped " 1324 D " 1,324.865 
Mayville, top of bottom step of front of court-house; chiseled square 1,462.49 
