111!. , .■/ 



service 

 1864-? 



c. 1864-? 



18M .' 



1864-? 



1S(,S ' 



1868-? 



lKi.N .' 



Location 



/..., 



length of each 



1S(,') c.lS'n 



c.1869-1936 



is 'II c.iso: 



1870-1893 & 



1 



Laurel, Md., Patuxenl Bollman truss 



River 



Near Veracruz, 

 Mexico, Medellfn 



ki\ci 



Bollman through 1/115' 

 truss 



Near Poinl of Rocks, Bollman truss(?) l/80'(?) 

 Md . Back Creek 



Bladensburg, Md., 

 Anacostia River 



Cape Fear, N.C., 

 Northeast Branch, 

 ( ape 1 : ar Riv< i 



( lape Fear, N.( !., 

 Northwest Branch, 

 Cape I sar Ri\ : i 



Quincy, [II., Quincy 

 Bay (in Mississippi 

 River) 



Baltimore, Md., over 

 J, .ncs Falls, B. & O. 

 RR., and Northern 

 ( entral RR. 



1 [arpers Ferry, Va., 

 Potomac River 



Baltimore, Md., Jones 

 Falls 



Bellaire, Ohio Ben- 

 wood, W. Va., ( >hio 



Ki\ ei 



Bollman truss 



Bollman truss(?) 



Bollman deck 

 truss 



Warren truss 



1/? 



Bollman tmss(?) 2/146'6" 



1/164' 



pivol ill aw 



150' 



1/217'(?) 

 pivot draw/ 



150' 

 4/85' 

 pivot draw/ 



190' 



2/100' 

 2/55'6' 



Bollman through 4 ? 

 truss 



Iron "" [sometrical 1/108' 



truss" i probabl) 



Pratl type) 

 Bollman deck 9/10"' 125' 



truss 



irki 



Replai ed stone arch thai had 

 been washed out. B. & O. 



RR. 



uz & Jucaro li\<. 

 I iiM iron bridge in Mexii o. 

 Designed and built by Boll- 

 man. 

 Iron In idge mentioned in B. & 

 I > RR. annual report, 1864. 

 1 he -pan length given is that 



of pre\ ion- shun .in li 



Span for se< ond tra< k, to mat< h 



ISM -pan. B. & O. RR. 



Wilmington Railway Bi idg ' lo, 

 This bridge was connected 

 to that over the Northwest 

 Branch by 2' : miles of timber 

 tresding. I designed and built 

 by Bollman. 



See al iove. 



Chicago, Burlington & < )uim j 

 RR. I he pivol di aw was 



formed of two 85-ft. simple 

 Bollman deek Spans whose 

 outer ends hung Irom hog 

 chains. Designed by toll- 

 man: built by I tetroit Bi idge 

 & Iron Woi ks 



North Avenue Bi idge. < lom- 

 posite double intersection 

 truss; timber top chord and 

 posts, wrought-iron lower 

 chord and ties. In 55-ft. spans, 

 both chords timber, Cost, 

 $73,588. Built by Bollman. 



Canal span (no. 8), Wide- 

 span (no. 2). Winchester 

 span, and West End span. 

 Destroyed by flood in 1936. 

 B. & O. RR. 



Charles Street Bridge. Three 

 lines of trussing. < k>si 

 297. Built li\ Bollman. 



In approaches; 2 spans on 



Ohio side; 7 on West Vir- 

 ginia side. B. & < >. RR. 



PAPER 36: ENGINEERING CONTRIBI I'lONS < )!■' WI.NDI.I. HOI. I.MAN 



101 



