APPENDIX D-1899. PRECISE LEVELS. ERIE, CRAWFORD, MERCER, VENANGO, CLARION, ARMSTRONG, WESTMORELAND, ALLEGHENY AND FAYETTE COUNTIES. ERIE, EDINBORO, MEADVILLE, SANDY LAKE, FRANKLIN, GLENORA, FOXBURG, KITTANNING, FREEPORT, MCKEESPORT, CHARLEROI, UNIONTOWN, MASONTOWN AND MORGANTOWN QUADRANGLES. The elevations in the following list are the result of a line of precise levels run during the field season of 1899 from Erie, over the Pennsylvania Railroad, to LeBoeuf; thence over the Erie Railroad to Franklin, and from Franklin to Pittsburg, over the Allegheny Valley Railway. Also, from Grafton, W. Va., over the Baltimore and Ohio Railroad to Leith; thence over the Pennsylvania Railroad to Pittsburg. At Erie the line began at United States Engineer Corps bench mark-chisel mark on southwest corner of foundation of light-keeper's dwelling, Erie harbor-and at Grafton the line started from the United States Coast and Geodetic Survey chisel mark on coping stone at north end of central pier of railroad bridge over Tygarts Valley river. The lines connect at Pittsburg and touch also upon bench marks established by precise leveling of the Pennsylvania Railroad. The entire line is included in the general adjustment of precise leveling in the United States, made by the United States Coast and Geodetic Survey in 1900, the results of which were published in Appendix No. 8 of their report for that year, the connection at Braddock, Pa., with the Pennsylvania Railroad precise leveling from Harrisburg being a junction point in the adjustment. This adjustment is at present accepted, and the following elevations are equivalent to those given in said Coast Survey Appendix, with the exception of those between Braddock and Pittsburg and that at Soldiers' Home, Erie, aluminum tablet, marked "635 Pittsburg 1899," the elevation of which as there given is 0.430 feet too high, due to a clerical error. The accepted elevation of the United States Engineer's bench mark referred to at Erie is 577.467 feet, which is 0.333 feet lower than the value given by the Engineer's Office, and that of the Grafton bench mark referred to is 996.954 feet above mean sea level. Between Braddock and Pittsburg the slight mistake made in the Coast Survey publication in distribution corrections is corrected in elevations at Homewood and Benvenue published herewith. The leveling between Grafton and Pittsburg was done by Mr. E. L. McNair, assisted by Messrs. J. E. Buford and John W. Hodges, rodmen. That between Erie and Pittsburg was done by Mr. C. H. Semper, assisted by Messrs. John W. Hodges and Iddo M. Lewis. All bench marks set in the course of this work were stamped with the word "PITTSBURG” and the date "1899," in addition to the figures of elevation, thus referring them to the central datum accepted for this group of leveling, which is an aluminum tablet set in the foundation of the Seventh Avenue Hotel, in Pittsburg, the adjusted elevation of which is accepted as being 738.718 feet above mean sea level at Sandy Hook. This elevation comes through five precise lines of levels, namely: United States Coast and Geodetic Survey levels from Sandy Hook and from Old Point Comfort to Hagerstown and Grafton; United States Coast and Geodetic Survey and United States Army Engineers to Albany, Oswego and the lakes to Erie; United States Geological Survey levels from Albany to Dunkirk, and Pennsylvania Railroad precise levels from Sandy Hook via Harrisburg to Pittsburg. ERIE, VIA LEBOEUF AND MEADVILLE, TO FRANKLIN. Feet. Erie, aluminum tablet in water table northwest corner of hospital ....... 635.962 1,103.273 Samson, 0.8 mile south of; aluminum tablet set in top of arch masonry north end east side of railroad bridge No. 8, marked "1214 PITTSBURG 1899," 1,215.175 Samson, 0.8 mile south of; Pennsylvania Railroad bench mark No. 85, bridge No. 8, copper bolt, 1,211.924 Samson, 4.3 miles south of; Pennsylvania Railroad bench mark No. 82, bridge No .14, 1,190.939 Leboeuf, 1.5 miles west of; on New York, Pennsylvania and Ohio Railroad, aluminum tablet set in creek masonry, on north side of railroad, marked "1193 PITTSBURG 1899," Millers, 0.9 mile west of; aluminum tablet set in top of southwest end .... .... 1,194.166 1,148.229 1,128.736 1,109.274 1,072.179 1,062.498 .... Utica; bronze tablet set in east abutment north side of highway ..... FRANKLIN, VIA KITTANNING, TO PITTSBURG. East Sandy, Allegheny Valley Railway station, 650 feet north of; coping stone of abutment at southwest corner of 2-span steel truss bridge across East Sandy creek; 1.2 feet below top rail 10% feet west of center of track; bronze tablet, marked "970 PITTSBURG 1899," Brandon, Allegheny Valley Railway station, 1.3 miles south of; face of rock ledge 20 feet southeast of center of track; 3 feet above top of rail; 1,100 feet south of milepost 112; bronze tablet, marked "957 PITTSBURG 1899," Kennerdell, Allegheny Valley Railway station, 1.5 miles south of; 300 feet west of milepost 106; large bowlder 10 feet north of center of track, 2.4 feet above rail; bronze tablet, market "941 PITTSBURG 1899," St. George station, 0.3 mile south of; bronze tablet set in rock on west side of rail, 150 feet south of whistling post, marked "PITTSBURG 925 1899," Feet. 1,038.455 1,013.784 989.517 987.953 971.096 957.923 942.595 926.415 Rockland, 0.1 mile south of; bronze tablet set in northwest wing abut- 921.031 906.378 899.345 Parker, bronze tablet set in top of abutment of road bridge at sta- .... 884.292 ........ 870.331 856.684 East Brady; bronze tablet set in east abutment wing wall of steel 852.955 845.073 Rimerton, 2 miles south of; bronze tablet set in north abutment west 821.148 807.584 Feet. Kittanning; bronze tablet set on front face northwest corner of public school on corner of McKain and Vine streets, marked "PITTSBURG 803, 1899," ... 803.870 Rosston, 0.2 mile south of; bronze tablet set in east abutment of bridge over river, marked "PITTSBURG 786, 1899," 787.323 West Penn Junction; bronze tablet set in foundation wall of turntable of Allegheny Valley Railway and Pennsylvania Railroad, marked "PITTSBURG 788, 1899," 788.986 West Penn Junction; copper bolt set in turntable wall of Allegheny Valley Railway and Pennsylvania Railroad, marked "788.85" (Pennsylvania Railroad B. M.), 788.967 Edgecliff, 1,000 feet south of; bronze tablet set in north abutment 763.875 771.580 749.202 Brilliant, 0.3 mile south of; bronze tablet set in wall of small culvert 745.700 744.097 Pittsburg; aluminum tablet set in foundation of Seventh Avenue Hotel, north side, at main entrance to, marked "PITTSBURG 738, 1899," 738.718 GRAFTON, VIA FAIRMONT, TO MORGANTOWN, WEST VIRGINIA. Grafton, West Virginia; Baltimore and Ohio Railroad bridge across Tygarts Valley River; coping stone at north end of central pier, chisel marked (United States Coast Survey bench mark), Valley Falls, 2.9 miles east of; bridge seat at northeast corner of girder bridge No. 104, 7 feet east of center of track, 4 feet below top of outer rail of curve; bronze tablet marked "986 PITTSBURG 1899," .. 996.954 ......... Powell's flag station, 2-3 mile west of; stone arch bridge No. 108, coping stone of wall, 1.1 feet below top of rail, 7 feet north of center of track; aluminum tablet marked "899 PITTSBURG 1899," Benton Ferry, 160 feet south of signboard at; bridge seat at southwest corner of small girder bridge No. 111, 4% feet below top of rail and 18% feet south of center of track; bronze tablet marked "885 PITTSBURG 1899," ... Fairmont, Baltimore and Ohio Station, 14 miles north of Baltimore and Ohio Railroad bridge No. 371, across Monongahela river; coping stone at north end of east abutment; bronze tablet marked "885 PITTSBURG 1899," ... Catawba, 0.8 mile south of; Baltimore and Ohio Railroad one-span truss bridge No. 369, coping stone at north end of east abutment, 3 feet below rail and 8 feet north of; bronze tablet marked "873 PITTSBURG 1899," 985.709 899.161 885.225 885.175 872.755 Little Falls, 1 1-3 miles northwest of; face of rock, bluff, 9% feet west of west rail and 4 feet above same, 1⁄2 mile north of bridge No. 366; bronze tablet marked "859 PITTSBURG 1899," 859.015 Uffington station, 400 feet north of; coping stone of abutment at northwest corner of one-span truss bridge No. 364, 3 feet below top of rail and 7 feet north of rail; aluminum tablet marked "828 PITTSBURG 1899," Morgantown, Baltimore and Ohio station, 480 feet south of; coping stone of abutment at northwest corner of truss bridge over Deckers creek; bronze tablet market "821 PITTSBURG 1899," Feet. 828.064 821.058 815.415 MORGANTOWN, WEST VIRGINIA, TO UNIONTOWN, PENNSYLVANIA. Vanvorhis, 1 mile south of; bridge seat at southeast corner of steel girder bridge No. 359; bronze tablet marked "815 PITTSBURG 1899," Point Marion station, 4 mile north of; coping stone at east end of north pier of six-span truss and girder bridge No. 356 across Cheat river; bronze tablet, marked "813 PITTSBURG 1899," Outcrop flag station, 0.2 mile south of; northeast of Baltimore and Ohio tunnel, east side of track, 3.7 feet above rail; bronze tablet marked "1084 PITTSBURG 1899," Fairchance, Baltimore and Ohio station, 550 feet north of; bridge seat at corner of small girder bridge No. 338; aluminum tablet marked "1065 PITTSBURG 1899," 813.077 1,084.063 1,065.412 UNIONTOWN, ALONG BALTIMORE AND OHIO RAILROAD, TO PITTS BURG. Uniontown, court house; corner of Main and Court streets, foundation wall 4 feet above ground, between Main street entrance and southwest corner of building. Aluminum tablet, marked "999 PITTSBURG 1899," ..... Upper Middletown flag station, 675 feet north of; face of rock in ... 999.080 919.958 867.735 777.858 764.269 Charleroi station, 1⁄2 mile south of; 150 feet south of city pumping 758.035 Baird flag station, 150 feet south of station; signpost, second step below coping stone of stone arch culvert, north side of track and 4.8 feet below top rail; bronze tablet marked "755 PITTSBURG 1899," 743.966 755.269 |