Nicolston Dam Rehabilitation

Project Overview

Work under this contract included the installation of a temporary steel sheet pile cofferdam surrounding the existing dam, the completed removal of the existing cast in place retaining walls and abutment walls on either side of the dam, the complete demolition, removal and excavation of the existing concrete dam structure and native material below the dam. The work also includes the construction of the new concrete dam which involved, preparation and installation of concrete mud slab, integrate forming for a complex 550m3 mass concrete pour of the dam, rebar installation and a multiple pour reinforced concrete capping of the dam structure. In addition, forming, rebar installation and concrete pouring of the new cast in place retaining walls and abutment walls at either side of the dam. Localized concrete repair of an outlet structure, temporary water bypass, installation of culverts and temporary access road, dam flash boards, life lines and safety booms, handrails and final restoration. Heavy environmental protections measures were implemented to control sediment introduction to the watercourse.

Scope of Work

  • In-Water Works
  • Steel sheet pile cofferdam
  • Extensive concrete work
  • Extensive Environmental protection measures¬†
  • Site Restoration

Project Photos

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