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Patterson Viaduct

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Nearest city
  
Architectural style
  
Masonry Arch Bridge

Added to NRHP
  
June 3, 1976

Total length
  
110 m

Location
  
Built
  
1829 (1829)

NRHP Reference #
  
76002221

Opened
  
December 1829

Area
  
8,094 m²

Body of water
  
Patterson Viaduct National Register Properties in Maryland

Built by
  
Wever, Caspar; McCartney, John

Bridge type
  
Arch bridge, Deck arch bridge

Similar
  
Thomas Viaduct, Patapsco Swinging Bridge, Carrollton Viaduct, Bollman Truss Railroad, Bloede's Dam

The Patterson Viaduct was built by the Baltimore and Ohio Railroad (B&O) as part of its Old Main Line during May to December 1829. The viaduct spanned the Patapsco River at Ilchester, Maryland. It was heavily damaged by a flood in 1866 and subsequently replaced with other structures.

Patterson Viaduct Old Main Line Photo Tour

History and design

Patterson Viaduct Cablestayed footbridge Patterson Viaduct ruins BampO Old Main Line

The viaduct was constructed during the first building phase of the railroad, which extended from Baltimore, Maryland, to Ellicott's Mills. The Patterson, the third bridge built for the B&O, was similar in construction to the company's first bridge, the nearby Carrollton Viaduct and was named for B&O director William Patterson. It was designed by Caspar Wever and built under the supervision of John McCartney, one of Wever's assistants. (McCartney's good work on the Patterson Viaduct was later rewarded with the contract to build the 1833-35 Thomas Viaduct.)

Patterson Viaduct Forgotten history of Ellicott City amp Howard County MD Patterson Viaduct

The bridge was constructed of granite blocks and was about 360 feet (110 m) long, rising about 43 feet (13 m) above its foundations. It had four graduated arches: two of 55 feet (17 m) chord length each and two of 20 feet (6 m) chord length each. The smaller arches allowed the passage of two county roadways, one on each side of the river. The exterior surfaces of the granite blocks were undressed, or rusticated.

Patterson Viaduct Cablestayed footbridge Patterson Viaduct ruins BampO Old Main Line

Patterson ceremonially opened the viaduct on December 4, 1829. In 1830, The viaduct was part of the route used by the B&O's first horse-drawn carriage train to Ellicott's Mills.

Patterson Viaduct httpsuploadwikimediaorgwikipediacommonsthu

The viaduct was almost totally destroyed in an 1868 flood. A single-span Bollman Truss built into the west abutment in 1869 incorporated the original roadway arch and upstream wing wall. The Bollman design was supplanted by another bridge before the railroad was realigned about 400 feet (120 m) upstream in 1902–03 with the opening of the Ilchester Tunnel. According to local folklore, Ilchester Tunnel is haunted by Peeping Tom.

Patterson Viaduct Forgotten history of Ellicott City amp Howard County MD Patterson Viaduct

Today, all that remains at the original crossing is the single masonry roadway arch of the 1829 construction on the west bank and the stone abutment on the east bank, just south of the present railroad bridge. In 2006, a cable-stayed footbridge, with a design that echoes a Bollman Bridge, was added atop the abutments.

The Patterson Viaduct Ruins were listed on the National Register of Historic Places on June 3, 1976.

References

Patterson Viaduct Wikipedia


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