Additional Past Projects

US6 over Pawnee Creek
Logan County, Colorado

Work on the project began in 2004
and is scheduled for completion in 2005

US6 over Pawnee Creek

The Pawnee Creek Bridge is typical of many highway bridges throughout the country. The precast box beam structure is being constructed in two stages to replace existing structures.

Duckels Construction began this project in the fall of 2004. When completed in 2005, the new bridge will provide increased capacity and greater width to accommodate future demand.

In 2004, the Colorado Department of Transportation began requiring “Girder Erection Plan” submittals for all new construction. This specification aims to protect the traveling public and enhance the safety of the construction process.

McNary Bergeron provided the Girder Erection Plan for Duckels construction. This plan outlined the crane information, rigging, and girder stabilization required to place the girders. In addition to providing assurance to the owner that erection would be conducted in a safe manner, these services also add a measure of efficiency, which benefits the whole construction team.
 

• Owner: Colorado Department of Transportation

• Contractor: Duckels Construction, Inc.

• Type: Precast prestressed box beam with CIP concrete composite deck

• Length: 217’

• Width: 89’

• Span Data: Two (2) 107ft spans

• Services Provided: Girder Erection Plan and Analysis, Onsite support and supervision

Sikorsky Bridge

Balfour Beatty Construction is completing the $80 million replacement of the 1939 Sikorsky Bridge, which carries 80,000 vehicles per day on Connecticut Route 15 over the Housatonic River in Milford/Stratford, Connecticut.

Work on the project consists of demolition of the existing Sikorsky Bridge, a four-lane structure with a metal grid deck and metal barrier, and replacement of it with a five-span continuous plate girder structure with composite concrete deck. The new structure, consisting of an Eastbound and Westbound bridge, has six lanes, full shoulders and a sidewalk. Upon completion of the Eastbound bridge, traffic will be diverted to the new span, the existing bridge will be demolished, and the Westbound bridge will be constructed.

The bridge consists of steel plate girders varying in depth from 11’ to 16’. Field sections are each approximately 100’ long and erected from land based and barge mounted cranes. Erection of girders is a challenging operation due to the extremely steep terrain at either abutment, strong tides in the river, and an active commuter rail line immediately adjacent to the East abutment.

Girders are shipped by rail from the fabrication facility in Oregon to the jobsite. From there, they are loaded onto barges and floated into position in anticipation of the erection process. After all girders are erected, temporary forms are installed and the concrete deck poured to make a composite structure.

Sikorsky Bridge
Housatonic River, Milford/Stratford, Connecticut

Work on the project began in 2001
and is scheduled for completion in June 2005

• Owner: Connecticut Department of Transportation

• Contractor: Balfour Beatty Construction

• Type: Reinforced Deck on Steel Plate Girders

• Erection Method: Land and water based cranes on temporary erection bents

• Length: 1,800’

• Width: Eastbound Structure – 60’ wide

• Width: Westbound Structure – 70’ wide

• Span Data: 5 spans, averaging 360’ long

• Services Provided: Construction Engineering including analysis of the structure during construction, girder erection procedures, and design of erection equipment and temporary supports.

Skyway Bridge
Oakland, California

Work on the project is scheduled
for completion in June 2006.

SFOBB “Skyway” Bridge

The Skyway portion of the Oakland Bay Bridge Replacement consists of dual precast segmental structures measuring 2,103 meters in length with a width of 2x26 meters. This structure is unique in its size and complexity.

Each structure includes four frames connected with internal hinge beams having typical span lengths of 160 meters. Typical segments are 8 meters long and up to 800 tons in weight. These segments are erected in balanced cantilever.

In special instances, segments on opposite sides of a pier must be lifted incrementally in order to avoid overstressing the pier columns. This degree of complexity in construction requires a significant amount of engineering by the contractor.

McNary Bergeron is providing Engineering oversight and equipment design for the Kiewit Flatiron Manson Joint Venture.
 

• Owner: Caltrans

• Contractor: KFM (Kiewit, Flatiron, Manson) a Joint Venture

• Type: Precast Segmental - Balanced Cantilever

• Length: 2103m

• Width: 2x26m

• Span Data: 13 cantilevers, 160m typical span

• Services Provided: Engineering oversight & equipment design

Susquehanna River

The Kraemer-Wagman Joint Venture team entered a winning bid of The $82.4 million to build the twin, 5,900-foot-long structures over the Susquehanna river on the Pennsylvania Turnpike. The new segmental concrete box girder bridges will be the first of their kind built in Pennsylvania. Each bridge will be 57 feet wide and have a total of 40 spans, each span averaging 150 feet. The spans will be built using the span-by-span method with an underslung truss.

The old bridge will remain open as the new one is being built, minimizing any impact to the flow of Turnpike traffic over the river. Once traffic is rerouted over the new structure, the old bridge will be disassembled.

Susquehanna River Bridge
Pennsylvania

Work on the project began in 2004
and is scheduled for completion in May 2007.
 

• Owner: Pennsylvania Turnpike Authority

• Contractor: Kraemer-Wagman Joint Venture

• Type: Precast Segmental

• Erection Method: Span-by-span with underslung truss

• Length: 5,900 ‘

• Width: Dual Boxes, Each 57’ wide

• Span Data: 40 spans, averaging 150’ long

• Services Provided: Construction Engineering including Construction analysis, Shop drawings, equipment design and on-site engineering support

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