Siefert Associates, LLC. has completed hundreds of projects since its inception. 
For a map of Siefert Associates, LLC. projects see the map here.
Below is a sample of the projects that highlight Siefert's construction engineering abilities.


World Trade Center

World Trade Center
  Lower Manhattan, 
   New York City
          
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Alexander Hamilton Bridge

Alexander Hamilton Bridge
  Manhattan and Bronx,
   New York City
 
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Tappan Zee Bridge

Tappan Zee Bridge
  New York
  
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Brooklyn Bridge

Brooklyn Bridge - Franklin Square Deck
Manhattan and Brooklyn,
New York City

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Columbia University

Columbia University

New York City

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Queens Bored Tunnels and Structures

Queens Bored Tunnels 1
  Queens, New York City
  
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Niantic River Groin Structure

Niantic
  Niantic River,
   Connecticut

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Moses Wheeler Bridge Foundations

Moses Wheeler Bridge
Milford, Connecticut

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Williamsburg Bridge

Williamsburg Bridge
Ward's and Randall's Island,
New York City

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Farmington River Bridge - Route 4

Farmington River Bridge - Route 4
Farmington, Connecticut

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Roslyn Viaduct

Roslyn Viaduct
Roslyn, New York

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Throgs Neck Bridge

Annadale Road Bridge
  Queens and Bronx,
   New York City

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Gansevoort Park - 420 Park Avenue

Gansenvoort Park - 420 Park Avenue
Manhattan, New York City

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New York Subway Brighton Line

New York Subway Brighton Line
  Brooklyn, New York City

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Triborough Bridge

Triborough Bridge
Ward's and Randall's Island,
New York City

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50th Street Ventilation Facility Complex Container Design

50th Street Ventilation Factility - Complex Container Design


  Manhattan, New York City

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