Westchester County Department of Environmental Facilities, Yonkers Joint Wastewater Treatment Plant Cellular Bulkhead Rehabilitation – Phase II, III, IV

Posted on July 30, 2015

Client: Westchester County Department of Environmental Facilities
Project Type: Yonkers Joint Wastewater Treatment Plant Cellular Bulkhead Rehabilitation - Phase II, III, IV
Project Period: 2012-2017
Project Cost: $13,000,000

Major Components

  • Tension Rods
  • Earth Anchors (H-Piles)/Deadman System
  • Protective Coating System
  • Concrete Encapsulation
  • Turbidity Curtains
  • Environmentally Safe Work Area
  • Site Restoration
  • Paving

Project Description

Side view of Yonkers-Bulkhead from Hudson RiverThe 90 MGD Yonkers Joint Wastewater Treatment Plant is located on the east side of the Hudson River. A cellular bulkhead protects the treatment plant on the north and west sides of the site. This project was developed to rehabilitate the existing deteriorated structural elements of the bulkhead system and prolong the life-span of the facility’s bulkhead system. The project is divided in three phases over a six year period.

Improvements to the 41-year old structure that serves as a boundary and waterside structure between the plant and the Hudson River have been previously performed for a portion of the bulkhead. These improvements included installing a protective barrier coating on the exterior of the cells from below the concrete seawall to the low tide area and installation of a “belly-band” repair system utilizing a tremie concrete banding; epoxy coated steel beams and a galvanized rod tie back system to H-piles driven on the landward side, (“dead-man” system).

Improvements under Phases II, III, and IV similarly include localized repair as required, concrete “dead-man” system, installation of a “belly-band” repair system utilizing a tremie concrete banding, coating system and rip rap restoration.

D&B Project Responsibilities

Top view of Yonkers-BulkheadD&B’s responsibilities include planning, design, and construction management services.

Planning and design services include evaulation and prioritizing of bulkhead rehabilitation to determine phase work rehabilitation based on the severity of the bulkhead corrosion. In addition, D&B performed the permitting applications for renewal of NYSDEC Permits.

D&B developed the structural repairs for the Cellular Bulkhead System and developed Contract Documents (Contract Plans & Specifications) for bidding and construction.

  • Comprehensive planning, permitting, design, bidding services, & construction management services
  • Corrosion Evaulation/Prioritization
  • Phased Project Construction
  • Bulkhead within Hudson River
  • NYSDEC – Tidal Wetlands, Protection of Waters & Water Quality Permitting
  • Site Restoration

                Diving crew at Yonkers bulkhead    Yonkers-Bulkhead

Crane placing steel beam at Yonkers-Bulkhead project

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