Bridge, Highway & Rail Projects

Yonkers Viaduct - Inspection and Design Rehabilitation

Rehabilitated Bridges and Retaining Wall in Yonkers
Project Overview: 
The Yonkers Viaduct project involved the rehabilitation of a system of structures carrying four mainline tracks and one sidetrack over the streets and station in the City of Yonkers. The ballasted deck structure, constructed in 1911, is comprised of four undergrade railroad bridges over local streets, namely Main Street, Dock Street, Wells Avenue and Ashburton Avenue, plus approximately 3,200 linear feet of concrete gravity-type retaining walls supporting the track embankment.
McLaren's Role: 
McLaren performed an in-depth inspection, prepared contract design documents and performed construction administrative services for the rehabilitation the four steel bridges and approximately 3,200 feet of retaining wall. The structures were load rated and analyzed, and underwent various steel repairs to support Cooper E72 loading. McLaren coordinated its efforts with the City of Yonkers, utility owners, and other parties affected. Among the key aspects of the design rehabilitation was understanding the structures’ historical nature, documentating existing materials, and implementating appropriate preservation techniques.
Service: 
Structural Inspection
Service: 
Structural Evaluation
Service: 
Load Rating Analysis
Service: 
Bridge Design
Service: 
Construction Administration
Location: 
Yonkers, New York
Client: 
Metro-North Railroad
Project Type: 
Bridge Rehabilitation
Role: 
Prime
Contract Period: 
1999-2004
Construction Cost: 
$7,300,000
Image: 
Yonkers_Viaduct_Ashburton.jpg
Image: 
Yonkers_Viaduct_DockSt.jpg
Image: 
Yonkers_Viaduct_Wells.jpg
Image: 
Yonkers_Viaduct_Retainingwall.jpg

Monroe Street Bridge Replacement Design

Monroe Street Bridge Replacement
Project Overview: 
The Monroe Street Bridge is a three-span overpass supporting four New Haven mainline tracks and two sidetracks, which service Metro-North Railroad’s Danbury Line. It is supported by stone masonry abutments and built-up steel piers supported by stone masonry pedestals. The primary objective was to replace the superstructure and piers and to improve the existing roadway vertical clearance.
McLaren's Role: 
McLaren was responsible for complete reconstruction design of the bridge, which was complex due to superstructure height limitation. The three-span structure was replaced with a single-span steel structure spanning approximately 72 feet. A finite element model of the entire superstructure was performed. Longitudinal stringers with moment connections were provided in addition to the thru-girders to share the loads. An elaborate construction staging scheme was performed to maintain three main tracks in operation at all times. Reconstruction was accomplished in multiple stages to minimize the impact on railroad traffic.
Service: 
Bridge Inspection
Service: 
Bridge Design
Service: 
Roadway Design
Service: 
Construction Administration
Location: 
Norwalk, Connecticut
Client: 
ConnDOT
Project Type: 
Bridge Replacement
Role: 
Prime
Contract Period: 
1998-2011
Construction Cost: 
$5,000,000
Image: 
Monroe_Bridge_2.JPG
Image: 
Monroe_Bridge_3.JPG
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Monroe_Bridge_4.jpg

Washington and Main Street Intersection

Washington and Main Street Intersection
Project Overview: 
McLaren provided design services associated with the reconstruction of Washington and Main Streets in historic Tappan, New York including full in-depth pavement replacement, drainage design including utilities and right-of-way mapping, and roadway and sidewalk reconstruction. Public meetings were held to include the local community in the project and to collect input for use in the planning of the reconstruction, which included pavement replacement.
McLaren's Role: 
McLaren performed roadway design, including the preparation of detailed plans and specifications. The firm also performed utility coordination, public information meetings, traffic analysis, topographic survey, right-of-way mapping, and construction inspection.
Service: 
Roadway Design
Service: 
Plans and Specifications
Service: 
Construction Inspection
Service: 
Utility Coordination
Service: 
Drainage Design
Location: 
Tappan, New York
Client: 
Rockland County Department of Highways
Project Type: 
Roadway Design
Role: 
Prime
Contract Period: 
2001-2008
Construction Cost: 
$2,000,000
Image: 
washmainint.jpg

Wallkill River Bridge Rehabilitation Design

Wallkill River Bridge
Project Overview: 
The Wallkill River Bridge is a six-span, concrete barrel arch bridge that carries Metro-North Railroad’s Port Jervis Line at Milepost 67.05 in Goshen, New York. Built in 1907, the bridge is approximately 381 feet in length with its superstructure consisting of concrete arch barrels supported on concrete abutments and piers and carries one railroad track over the Wallkill River.
McLaren's Role: 
A 2004 inspection of the bridge revealed a wide longitudinal crack on the underside of the bridge, a 24” sinkhole at the top of the deck, a clogged drainage system, severe scaling and spalling, and rotted track ties. McLaren has developed bridge rehabilitation designs based on the findings of this inspection as well of our own cursory inspection of the bridge that determined whether there were other significant conditions previously undiscovered. Various concrete repairs were designed, including repair or replacement of tile drains; removal of delaminated concrete; and repair of the longitudinal cracks. Waterproofing remedies were also developed.
Service: 
Bridge Inspection
Service: 
Bridge Design
Service: 
Surveying
Service: 
Construction Administration
Location: 
Goshen, New York
Client: 
Metro-North Railroad
Project Type: 
Bridge Design
Role: 
Prime
Contract Period: 
2006-2009
Construction Cost: 
N/A
Image: 
6a Wallkill.jpg
Image: 
6b Wallkill.jpg

Taconic Bridges RDSA

Taconic Parkway Bridge Design Services
Project Overview: 
As part of a Design Services Agreement with the State, McLaren provided engineering services for the replacement and rehabilitation of a dozen bridges throughout Region 8. Among the bridges assigned under this agreement are the Taconic State Parkway over Angell Hill Road, in Columbia County, Route 6 over the West Branch of the Croton River, Route 121 over the Stone Hill River, Route 22 over Muscoot Reservoir and numerous bridges along 9A in Westchester County, and Route 9D in Putnam and Dutchess Counties. The Bruckneck Tunnel was also inspected and rehabilitated under this program.
McLaren's Role: 
McLaren provided Phases I-VI of the design services associated with the replacement of both of the Taconic State Parkway Bridges. Work involved removal of a three-span structure and replacement with a new single span bridge on an existing horizontal and vertical alignment. The proposed superstructure consisted of pre-stressed concrete arch beams with stone facing on the fascia. Other areas of involvement included M&PT, approach work, paving, pavement markers, striping and utilities, and guide railing.
Service: 
Bridge Inspection
Service: 
Bridge Design
Service: 
Roadway Design
Service: 
Load Rating Analysis
Service: 
Tunnel Inspection and Rehabilitation
Service: 
Maintenance and Protection of Traffic
Location: 
Region 8, New York
Client: 
New York State Department of Transportation
Project Type: 
Bridge Design
Role: 
Prime
Contract Period: 
1998-2000
Construction Cost: 
$10,290,000
Image: 
8a RDSA Bridges Rt. 22.jpg
Image: 
8b RDSA Bridges.jpg
Image: 
8c RDSA Bruckneck Tunnel.jpg