New York City Department of Environmental Protection, Rondout-West Branch Bypass Tunnel

Posted on January 19, 2015

Client: New York City Department of Environmental Protection
Location: Rondout-West Branch Bypass Tunnel
Project Type: Construction Management
Project Period: 2013 - 2022
Project Cost: $750,000,000

Major Components

  • Resident Engineering
  • Inspections
  • Noise and Groundwatering Monitoring
  • Constructability/Bidability Reviews
  • Risk Analysis using Active Risk Management Software
  • Change Orders
  • Scheduling and Delay Analysis
  • Claim Review
  • Record Drawings

Project Description

cover (2)Project Overview

This project replaces a section of the existing Delaware Aqueduct in the vicinity of the Hudson River that has been  leaking an estimated 20 – 40MGD. The first phase of the project which is currently underway provides for  construction of two (2) concrete lined access shafts, one 30’ diameter X 900’ deep and the other 33’ diameter X 700’ deep on each side of the river to facilitate construction of the actual bypass tunnel. Work performed under Phase I also includes extensive site development including demolition, earthwork, utility construction and site and NYS roadwork. Phase II of the project scheduled to commence in 2016 provides for construction of a 2.5 mile-14’ diameter triple lined bypass tunnel between the two shafts constructed in Phase I with connection tunnels constructed between each new shaft and the existing aqueduct during the final connection phase. Work under Phase II also includes rehabilitation of other reaches of the existing aqueduct as well as improvements to existing mechanical facilities along this portion of the 45 mile Rondout-West Branch portion of the Delaware Aqueduct.

D&B Project Responsibilities

As a major subconsultant on this mega project D&B’s responsibilities currently include project management,  Resident Engineering/Inspection services related to Shaft and site work construction, performance of noise and  groundwater monitoring, SWPPP inspections and associated reports, maintenance of documentation, maintenance  of as-built “red-line” drawings, preparation of field change orders, coordination with NYSDOT and local
government  agencies, processing contractors’ payments, constructability/bidability review of the Phase II work and other related  services, and will include similar REI services during Phase II of this project.

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