Patterson Viaduct, Baltimore and Ohio Railroad
1830
1830
1864
circa 1925
circa 1925
circa 1925
circa 1861-1864
1912-12-20
1913-01-01
1913-01-21
1854
1913-01-21
1862
1862-09-08
circa 1912
circa 1912
circa 1860-1890
1867-12-14
1912-12-21
1912-12-21
1912-12-13
1913-01-09
1912-12-20
1912-12-20
undated
circa 1912
1913-03-12
1913-03-12
1913-01-13
circa 1860
1913-01-13
1913-01-13
1913-01-09
1913-01-09
1913-01-09
1913-01-09
1913-01-09
1913-03-12
1913-03-12
1913-03-12
1792
1874
c.1862-1865
1760
1842
1953-08
undated
circa 1925
circa 1861-1865
1800-1810
1887
1881
1841-10-26
circa 1950
1899-02-13
circa 1950-1970
1957-11
1950
circa 1844-1850
circa 1844-1850
circa 1850