Patterson Viaduct, Baltimore and Ohio Railroad
1830
1830
1829
circa 1861
circa 1866
1949-07-10
1942-06-03
1917-05-14
circa 1936
1836
1942-12-20
1957-11
1870
circa 1900
circa 1915
1918-1920
1950-10-03
circa 1867
circa 1880
1913-01-21
1913-01-13
1870-05-19
1913-01-13
1995-08-19
circa 1970s
circa 1910
circa 1950-11
circa 1929
1821
1992-1993
1850-01-15
1831-09-22
1883-09
1861-04-21
1774-12-03
1873
1904
1914-08-01
1914-08-01
undated
undated
1976-01
1976-06-17
1976-01-10
1903-05-02
1804-02-18
circa 1920
circa 1938-1950
circa 1904
circa 1925
circa 1925
1952-06
circa 1948
1950-12
1850
1904-06-14
1904-06-14
1904-06-14
1814-09
1889-08
1888