PRIMARY LEVELING. \> 7 
Fe< I. 
Lake View, 1.99 miles north of, west end of box culvert; northeasl corner of coping stone, chis- 
eled square ' ,;,•-, .-,-, 
Lake View, in front of station; top of rail 708.8 
North Evans, in front of station; top of rail 697 5 
Derby, 1.29 miles north of, 200 feet east of Lake Shore and Michigan Southern track, southeast 
corner of highway bridge, crossing Pennsylvania Railroad, in west face of concrete wing wall 
2 feet above ground; bronze tablet stamped "724 ROCHESTER 1902" 723.807 
Derby, in front of station; top of rail 704.6 
Derby, 1.27 miles south of trestle No. 236, southwest corner, near northwest corner of coping 
stone; chiseled square 681.08 
SILVER CREEK QUADRANGLE. 
Angola, 1.69 miles northeast of, northeast corner of trestle over cattle pass. I f< »ot above t rack, 
on coping stone of wing wall; chiseled square 677. 16 
Angola, 0.51 mile northeast of, southwest corner of truss and stone-arch Bridge No. 228, near 
northwest corner of coping stone; chiseled square 680. 06 
Angola,, in front of station; top of rail 690. 
Farnham, southeast corner of Bridge No. 220, in east face of parapet coping stone; bronze 
tablet stamped " 633 ROCHESTER 1902 " 632. 956 
Farnham, in front of station; top of rail 632. 3 
Farnham, 1.21 miles southwest of, northeast corner of culvert 218, on coping stone; chiseled 
square 610. 15 
Irving, in front of station; top of rail 601. 7 
Silver Creek, southeast corner of Bridge No. 207 over Dunkirk street, near east corner of para- 
pet wall; chiseled square 622. 10 
Silver Creek, in front of station ; top of rail 625. 5 
Silver Creek, 1.58 miles southwest of, southeast corner of Bridge No. 204 ( A52), near southeast 
corner of parapet stone; chiseled square 628. 02 
DUNKIRK QUADRANGLE. 
Waites crossing, nearly opposite flag station ; top of east rail 625. 4 
Waites crossing, 0.70 mile south of, southeast corner of cattle pass Bridge No. 195, at east 
corner of parapet stone ; chiseled square 624. 10 
Dunkirk, in front of Lake Shore and Michigan Southern railway station; top of rail 598. 9 
Dunkirk, St. Mary's Home and School, Washington avenue, between Third and Fourth 
streets, in water table 20 feet from northeast corner; aluminum tablet stamped "598 DUN- 
KIRK 1899 " 598. 936 
PRIMARY LEVELING. 
NASSAU, QUEENS, AND SUFFOLK COUNTIES. 
BABYLON, HEMPSTEAD, MORICHES, NEW YORK, NORTHPORT, OYSTER BAY, RIYERHEAD, 
AND SETAUKET QUADRANGLES. 
The elevations in the following list are based upon army engineers' bench mark 
" +18.0555" cut on the face of the retaining wall of Long Dock, in the military post 
grounds at Willets Point, and corrected also in agreement with United States Coast and 
Geodetic Survey elevation at Patchogue. 
The elevation of this is accepted as 14.135 feet above mean sea level, as obtained from 
tidal-gage observations made by the Coast and Geodetic Survey and the Army Engineer 
Corps at Willets Point. The elevations listed on the Hempstead and Oyster Bay quad- 
rangles are republished for completeness without correction from the Nineteenth Annual 
Report of the United States Geological Survey, pp. 215-217. 
The leveling on the Hempstead and Oyster Bay quadrangles was done in 1897 under 
the direction of Mr. E. B. Clark, topographer, by Mr. Clark Brown, levelman; that on the 
Northport and Babylon quadrangles was done in 1901 under the direction of Mi. Glenn S. 
Smith, topographer, by Mr. C. H. Semper, levelman; that on the Sctauket quadrangle was 
done in 1902 under the direction of Mr. Geo. H. Guerdrum, topographer, by Mr. Alfred P. 
Meade, jr.; and that on the Moriches and Rivcrhead quadrangles was done in 1903 under 
the direction of Mr. J. M. Whitman, topographer, by Mr. Geo. Seidel, levelman. All 
standard bench marks dependent on this datum are stamped with the letters referring to 
" WILLETS PT." in addition to the figures of elevation. 
