Shocks Mills Bridge carries tracks of the

Norfolk Southern Railway The Norfolk Southern Railway is a Class I freight railroad operating in the Eastern United States. Headquartered in Atlanta, the company was formed in 1982 with the merger of the Norfolk and Western Railway and Southern Railway. The comp ...

(formerly the

Atglen and Susquehanna Branch The Atglen and Susquehanna Branch is an abandoned branch line of the Pennsylvania Railroad that ran between Lemoyne, Pennsylvania, Lemoyne and Atglen, Pennsylvania. A portion of the line is now the Enola Low Grade Trail. History The Atglen and ...

of the

Pennsylvania Railroad The Pennsylvania Railroad ( reporting mark PRR), legal name as the Pennsylvania Railroad Company, also known as the "Pennsy," was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. At its ...

) over the

Susquehanna River The Susquehanna River ( ; Unami language, Lenape: ) is a major river located in the Mid-Atlantic (United States), Mid-Atlantic region of the United States, crossing three lower Northeastern United States, Northeast states (New York, Pennsylvani ...

between

Marietta, Pennsylvania Marietta is a borough in Lancaster County, Pennsylvania, United States. The population was 2,633 at the 2020 census. It is located on the east bank of the Susquehanna River, northwest of Columbia. Geography Marietta is located in western Lan ...

and Wago Junction, Pennsylvania.

Construction

During the early 20th century, the PRR constructed what it referred to as its "Low-Grade Lines", branches constructed with a minimal grade to divert freight traffic from its congested and steeper main lines. One of these new lines was the Atglen and Susquehanna Branch, which left the Main Line at Parkesburg to cut cross-county to the Susquehanna River, followed the east bank of the river to Marietta, crossed the river and ran along the west bank to Wago Junction, where it met the

Northern Central Railway The Northern Central Railway (NCRY) was a Class I Railroad in the United States connecting Baltimore, Maryland, with Sunbury, Pennsylvania, along the Susquehanna River. Completed in 1858, the line came under the control of the Pennsylvania R ...

. The line from Marietta to Wago Junction was chartered as the York Haven and Rowenna Railroad, and much of the construction, including the crossing of the Susquehanna at Shocks Mills, was done by H.S. Kerbaugh, a major PRR contractor. The bridge was first opened on January 1, 1905, as a twenty-eight span brick arch.

Damage from Hurricane Agnes and repair

The bridge was closed during the flooding caused by

Hurricane Agnes Hurricane Agnes was the List of costliest Atlantic hurricanes, costliest hurricane to hit the United States at the time, causing an estimated $2.1 billion in damage. The hurricane's death toll was 128. The effects of Agnes were widespread, ...

in late June 1972. Penn Central's commuter train service between Lancaster and Harrisburg was affected by the damages to the bridge, and freight traffic to Harrisburg was required to be re-routed. In August of that year, the federal bankruptcy court, overseeing the reorganization of Penn Central, gave the railroad permission to make repairs to the span, a process that was expected to take "four or five months"."PC Given Signal to Repair Span", ''The Daily News'' (Huntingdon, PA), August 29, 1972, p12

References

{{coord, 40.0616, N, 76.6371, W, region:US_type:landmark, display=title Railroad bridges in Pennsylvania Bridges over the Susquehanna River Pennsylvania Railroad bridges Bridges completed in 1905 Bridges in Lancaster County, Pennsylvania Bridges in York County, Pennsylvania Norfolk Southern Railway bridges Brick bridges in the United States Concrete bridges in the United States Steel bridges in the United States Arch bridges in the United States 1905 establishments in Pennsylvania