Bridge No: 3520000130100

Asset ID: 889

County: Marlboro

Bridge Name: Great Pee Dee River Bridge

Facility Carried: US 1 Southbound (Powe Street)

Feature Intersected: Great Pee Dee River

Year Built: 1938

Year Reconstructed:

Main Structure Type: stringer

Design: Continuous

Main Material: Steel

Railing Type: Concrete 1-bar cantilevered off brush curb railings

Number of Main Spans: 2

Number of Approach Spans: 32

Approach Type: T Beam, reinforced concrete

Structure Length: 1900 feet

Structure Width: 28.2 feet

Setting: The bridge carries the 2 southbound lanes of US 1 over the Great Pee Dee River at Cheraw.The parallel bridge (3520000110100) for the northbound lanes was built in the early 1960s when this section of highway was dualized.A thru truss bridge carries the CSX RR over the river downstream of the highway bridges.

The 34 span, 1,900'-long high-level bridge consists of a continuous steel stringer main span over the river and T beam approach spans.The main span is a 4-span continuous steel stringer unit (90'-110'-110'-90') with 4 lines of built-up steel stringers, angle cross-bracing and diaphragms, and a concrete deck.The exterior lines of girders are haunched over the piers but the interior lines are not.The approach spans are T beams with 4 lines of haunched beams.The bridge has state-standard concrete 1 bar cantilevered off brush curb railings, and it is supported on horizontally scored 2-column concrete bents with webwalls.The river piers have lancet-shape arch panels.

The 1938 continuous steel stringer bridge has been determined eligible as a result of advancing a transportation improvement project.The state bridge department began applying continuous design principles to standard bridge types, like stringers and girder-floorbeams, in the mid 1930s, and they were common by the 1950s.Long-span examples, such as this one, became favored by state bridge engineers for major river crossings.Continuous designs achieved greater economy of material and design than simple spans of comparable lengths, but required more complex stress analysis.