Client: OHL, USA

Location: Staten Island and Brooklyn, New York

Construction Cost: $ 250 Million

The project involved the abandonment of two existing water siphons (36-inch and 42-inch) and the replacement with a new 72-inch water siphon across the New York Harbor and the Anchorage Channel, between Brooklyn and Staten Island.

Service Provided:

  • Responsible for Geotechnical/Structural Instrumentation and Monitoring
  • Installation and monitoring of the following instrumentation:
    • 10 Inclinometers
    • 18 Open-ended Piezometers
    • 4 Multiple Point Borehole Extensometer
    • 2-Automated Total Station
    • 110 Surface Settlement Points
    • Vibration Monitoring
    • Noise Monitoring
  • Shop drawing preparation for excavation support system and foundation for crane
  • Geotechnical Borings for 120 foot deep TBM launching and receiving pits design