Dates of Location Type No. spans/ 



service length of each 



1870-c. 1895 Belpre, Ohio— Park- Bollman deck 16/? 



ersburg, West Ya., truss 

 Ohio River 



1870-? Elysville, Md., Patap- Bollman through 4/? 



sco River truss 



1871— c.1895 Baltimore, Md., Jones Timber and iron ? 



Falls truss 



1871-C.1892 Baltimore, Md., over Warren truss 1/100' 



Northern Central 

 RR. at Jones Falls 



1873-1923 



1873- 



c.1873- 



1873- 



1873- 



Cave Station, Va. 

 Middle River 



Bollman deck 

 truss 



l/98'7' 

 l/63'5' 



1873-1923 Mount Crawford, Va., Bollman deck truss 2/98'6" 



North River 1/148'9' 



1873-1923 Verona, Va., North Bollman deck truss 3/98'7" 

 River 



Wadesville, Va., Ope- Bollman through 1/147' 

 quon Creek truss 



Baltimore, Md. 



Baltimore, Md. 



Baltimore, Md. 



Iron roof trusses 



Cast-iron stairs 



Cast-iron frame- 

 work 



1875-c.l 913 Baltimore, Md., Jones Iron truss 1/? 



Falls 



1876-C.1913 Baltimore, Md., Jones "Single-beam 1/? 



Falls iron bridge" 

 (truss?) 



1876— c.1913 Baltimore, Md., Jones "Single-beam iron 1/.' 



Falls bridge" (truss?) 



Remarks 



In approaches; 7 spans on 

 Ohio side; 9 on West Virginia 

 side. B. & O. RR. 



Skew; replacement of Upper 

 Bridge(?). B. & O. RR. 



Decker Street (now Maryland 

 Avenue) Bridge. Cost, $24,- 

 975. Built by Bollman. 



North Avenue Bridge. Com- 

 posite double intersection 

 truss; cast-iron top chord and 

 posts; wrought-iron bottom 

 chord and ties. West span. 

 Built by Bollman. 



Valley Railroad of Virginia 

 (B. & O.) Bridge no. 120. 

 The main span was a Whipple 

 deck truss. Replaced with 

 plate girders. Designed by 

 Bollman. 



Valley Railroad of Virginia 

 (B. & O.) Bridge no. 117. 

 Designed by Bollman. 



Valley Railroad of Virginia 

 (B. & O.) Bridge no. 129. 

 The main span was a 147-ft. 

 Whipple deck truss. De- 

 signed by Bollman. 



Span length given is that of 

 previous wood span that 

 burned in 1862. B. & O. RR. 



First Presbyterian Church. 

 Built by Bollman; possibly 

 designed by him. 



City Hall. Cost, $12,840. De- 

 signed by George A. Fred- 

 erick, architect; built by 

 Bollman. 



Dome of the City Hall. Cost, 

 $70,525. Designed by George 

 A. Frederick; built by 

 Bollman. 



Fayette Street Bridge. Cost, 

 $9,396. Built by Bollman. 



Canton Avenue (now Fleet 

 Street) Bridge. Cost, $8,904. 

 Built by Bollman 



Eastern Avenue Bridge. Cost, 

 $12,382. Built by Bollman. 



102 



BULLETIN 240: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



