Dates nj 

 service 



1877- 



Location 



I ypt 



Baltimore, Md., Jones Pratt and bow- 

 Falls string truss 



is;; c.1913 Baltimore, Md., Jones Iron truss 



Falls 

 1879-? Baltimore, Md. Drawbridge 



1879-C.1930 Baltimore, Md., over Warren truss 

 Jones Falls and rail- 

 road tracks 



1881-1960 Baltimore, Md., Wrought-iron 



(Woodberry), Jones Prat( truss 

 Falls 



Harpers Ferry, Va., Bollman through 



Arsenal Canal truss 



Baltimore. Md., Bollman through 



Gwynns Falls truss 



pans 

 length 



1 88'6" 



1/. J 



lA" 



2/173'9" 



1/148' 



Remark i 



Lombard Street Bi idge. I hr< e 

 lines ul ii ii--: two out i 

 ■ omp ind wrought- 



iron piiKuini.il Pratt type; 

 center composite bowstring 

 with Pratt-system web. Both 

 i hoi ds are i ast-iron water 

 mains, bifurcated at the end 



bearing c in posts and 



wrought-iron ti<-v In sa \ ii e. 



$7,632. Designed b> 



Jas. ( 'in i .in. Baltimore water 



department ; built l>\ Bollman. 



Bath Street Bridgi 

 S4.172. Built by Bollman. 



Over entrance to Cit> Dock. 



Cost, 513,182. Built In Bull- 

 man. 



Ninth Street (now Guilford 

 Avenue) Bridge. Composite 

 trusses; cast-iron top i hord 

 and end posts; wrought-iron 

 bottom chord and web mem- 

 bers. Cost, $38,772.45. Built 

 h\ Bollman; designed l>\ 

 Latrobe. 



Union Avenue Bridge, Built 

 l>> Bullm.m: possiblydesigned 

 In him. 



Arsenal Bran< h, B. & < ). RR. 

 Skew type. Span Length is 

 that ul pre\ ious timber span. 



B. & O. RR. 



PAPER 36: ENGINEERING CONTRIBUTIONS OF WENDEI. BOLLMAN 



103 



