Owner: NYCEDC

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