Patterson Viaduct, Baltimore and Ohio Railroad
1830
1830
1880
1883-09
circa 1814
after 1848
1861-04-21
1845
1861
circa 1870
1945-07-23
circa 1993
1904
1914-08-01
1914-08-01
1976-01-10
1976-06-25
1971-07-01
1976-02-02
1976-08-12
1900-10
circa 1938-1950
1899-02
circa 1925
circa 1925
circa 1925
1950-10-03
circa 1867
1889-08
1888
1888-09
1888
circa 1970
circa 1970
circa 1970
circa 1910
circa 1910
circa 1910
circa 1910
circa 1910
circa 1870-1890
circa 1925
1913-01-21
1913-01-22
1913-02-28
1913-02-28
1913-03-31
1913-03-31
1913-03-12
1913-03-12
circa 1929
circa 1970s
1836
circa 1952
circa 1812
circa 1810-1815
circa 1800
1992-1993
undated
1792
1855