Bridge, Highway & Rail Projects

NYSTA Canal Structure Inspections

NYSTA Canal Structure Inspection
Project Overview: 
McLaren is providing underwater inspection and assessment of 90 barge canal structures for the New York State Thruway Authority along the Albany to Buffalo segments of the historic New York State Waterway Canal System. Structures included locks, guard gates, fixed crest dams, moveable dams, tainter gates, spillways, terminals, docks, guide structures, and culverts.
McLaren's Role: 
McLaren was responsible for these underwater inspection and assessment services for three term contracts. For each contract, comprehensive reports were prepared including underwater photo documentation, sketches, and a summary of results of findings. Inspections were conducted in accordance with the NYSDOT Bridge Diving Inspection Manual, and the NYSTA Draft Specification for Bridge Diving Inspection and Fathometer Survey Manual.
Service: 
Underwater Inspection
Service: 
Structural Assessment
Location: 
Upstate, New York
Client: 
New York State Canal Corporation for the New York State Thruway Authority
Project Type: 
Canal Inspection
Role: 
Prime
Contract Period: 
1996-1997;1998-1999; 2003-2005
Construction Cost: 
N/A
Image: 
42a - NYSTA Canals.jpg
Image: 
42b - NYSTA Canals.jpg

NYSDOT Underwater Bridge Inspection, Regions 10 & 11

NYCDOT Region 10 & 11 Underwater Bridge Inspection
Project Overview: 
McLaren provided underwater bridge inspection and fathometer survey services for bridges in NYSDOT’s Regions 10 and 11, covering New York City and Long Island. The firm has performed these inspections for three previous cycles (1993-1996, 2001-2002, and 2007-2008).
McLaren's Role: 
The 1993-1996 biennial inspection program covered inspection and assessment of nearly 1,000 bridge piers and over 8,000 linear feet of relieving platform supporting FDR Drive in Manhattan. In addition to the inspection of the bridges, McLaren was responsible for the fathometric survey of more than 200 piers. The 2001-2002 biennial inspection program covered inspection and assessment of a total of 72 bridges encompassing 629 SSUs. The 2007-2008 program covered inspection and assessment of a total of 79 bridges encompassing 309 SSUs and 101 fathometric surveys. Comprehensive reports were prepared including still photographs, sketches, underwater videotape recordings, and a summary of results of findings. All reports were prepared in metric, and all inspection work was performed in accordance with the NYSDOT Bridge Diving Inspection Manual.
Service: 
Underwater Inspection
Service: 
Fathometric Survey
Location: 
New York City/Long Island, New York
Client: 
New York State Department of Transportation
Project Type: 
Bridge Inspection
Role: 
Prime
Contract Period: 
1993-1996; 2001-2002; 2007-2008
Construction Cost: 
N/A
Image: 
9a NYSDOT Bridge inspection.jpg
Image: 
9b NYSDOT Bridge inspection.jpg

NYCDDC Pedestrian Bridge Design

Pedestrian Bridge at 71st Street
Project Overview: 
The New York City Department of Design and Construction, Division of Infrastructure, has retained McLaren's services to provide architectural, structural engineering, and construction related services for the replacement of pedestrian bridges as part of a Design Excellence program for the City. The bridges to be designed by McLaren include the following: 55th Avenue over LIRR Main Line in Queens; 94th Street over LIRR Port Washington Branch in Queens; 167th Street over LIRR Port Washington Branch in Queens; 71st Avenue/Cooper Avenue over LIRR in Queens; West 155th Street over AMTRAK & West Side Highway in Manhattan; and 204th Street over the Harlem Line of Metro-North Railroad in Bronx.
McLaren's Role: 
The project’s intent is to provide an ADA (Americans with Disabilities Act) compliant design for these bridges at significant locations throughout New York City. Innovative design solutions were necessary in order to achieve the project’s goal, with the bridges meshing well with the surrounding environment. McLaren also had to select appropriate materials and construction methods and integrate the design within the fabric of each neighborhood.
Service: 
Pedestrian Bridge Design
Service: 
Site/Civil Engineering
Service: 
Drainage Analysis
Service: 
Drainage Design
Location: 
Manhattan, Queens and Bronx, New York
Client: 
NYCDDC
Project Type: 
Pedestrian Bridge Design
Role: 
Prime
Contract Period: 
2006-2008
Construction Cost: 
N/A

Montgomery County Pedestrian Bridges

Montgomery County Pedestrian Bridges
Project Overview: 
The Park Development Division of the Maryland County Department of Park and Planning of the M-NCPPC retained McLaren to provide engineering services for the design and replacement of eight (8) pedestrian bridges located throughout several parks in Montgomery County, Maryland. Five (5) of the bridges are located on the Meadowside Nature Center Trail, and one (1) bridge is at each of the other three (3) sites. For each location, McLaren is working to blend the bridges into their surroundings and find the most cost efficient approach to engineering design.
McLaren's Role: 
Upon inspection, McLaren found the bridges to be badly deteriorated, several of them unsafe for pedestrian use. Key to the design process was gaining access to the different bridge sites, as some of the bridges are located on nature trails and cannot be reached by vehicle. Where feasible, McLaren used Recycled Plastic Lumber (RPL) for the new bridges to allow easy transport of materials and on-site construction. Topographic surveys and geotechnical investigations were performed at each site, and McLaren coordinated all necessary permits.
Service: 
Pedestrian Bridge Design
Service: 
Geotechnical Engineering
Service: 
Surveying
Service: 
Permitting
Service: 
Construction Administration
Location: 
Montgomery County, Maryland
Client: 
Maryland-National Capital Park and Planning Commission (M-NCPPC)
Project Type: 
Pedestrian Bridge Design
Role: 
Prime
Contract Period: 
2006-2010
Construction Cost: 
N/A
Image: 
Montgomery_Bridges_2.jpg
Image: 
Montgomery_Bridges_3.jpg

MNR Timber Dapping Design

7a MNR HA29.52.jpg
Project Overview: 
McLaren was retained by Metro-North Railroad to provide engineering services associated with the timber tie replacement of the following three bridges: Bridge NH14.37 over Columbus Avenue in Mount Vernon, NY; Bridge NH15.06 over Fifth Avenue in Pelham, NY; and Bridge HA29.52 over Davis Brook in Thornwood, NY. The objective of the project was to ensure the structural integrity and safety of open deck bridge timbers on each of the bridges. The approximate number of bridge timbers replaced was 374.
McLaren's Role: 
In order to ensure the proper fit of the replacement bridge timbers, McLaren performed a field survey and measurements at each bridge site, developed existing and proposed rail profiles, and developed spacing diagrams, dapping diagrams, and packaging diagrams.
Service: 
Bridge Design
Service: 
Surveying
Service: 
Track Design
Service: 
Timber Dapping Design
Location: 
Westchester County, New York
Client: 
Metro-North Railroad
Project Type: 
Bridge Design
Role: 
Prime
Contract Period: 
2006
Construction Cost: 
N/A
Image: 
7b MNR HA15.06(2).jpg
Image: 
7b MNR HA15.06.jpg
Image: 
7c MNR HA14.57(2).jpg
Image: 
7c MNR HA 14.57.jpg