Newlands Cross Upgrade EIS - European Investment Bank

South Dublin County Council N7 Newlands Cross Upgrade
Environmental Impact Statement
Arup Consulting Engineers
4.3 Scheme Construction
4.3.1 Introduction
Construction of the scheme can be divided into the following principal activities:-
• Construction of the temporary traffic diversions to the N7;
• Construction of the overpass structure;
• Construction of the approach embankments and road pavement to the overpass structure;
• Construction of the on (merge) and off (diverge) slip roads from the N7 mainline;
• Alterations to the Fonthill Road South and the Belgard Road on the approach to the
junction;
• Reinstatement and landscaping of the scheme.
The scheme construction is estimated to take approximately 22 months to complete. It is
anticipated that approximately 100 people could be employed on the scheme construction
works.
The method of procurement for the project will adopt the new Government Form of
Construction Contract for Public Works.
An outline construction method has been developed indicating feasible temporary traffic
arrangements to ensure that the scheme can be built within the site constraints, and this
methodology is illustrated in figures 4.8 to 4.14.
The Contractor for the works will be contractually bound within the contract for the works by
any conditions arising from the site constraints, the recommendations of the EIS, the
Employer’s Requirements for the project, any modifications that may be imposed on the
scheme by An Bord Pleanála and all Statutory Regulations.
Before the commencement of construction, the Employers Representative will review and
accept the Contractor’s programme and the proposed method of construction. The method of
construction will include specific details on how the works will be undertaken and how the
environmental objectives or Statutory Regulations will be met.
This section provides an outline of the general activities and issues associated with the
construction of the proposed scheme including:-
• Construction constraints;
• Construction programme, staging and working hours;
• Construction compound;
• Generation, reuse and disposal of excavated material;
• Construction traffic and access;
• Preparatory works;
• Public traffic management;
• General construction methods.
4.3.2 Construction Constraints
The proposed scheme will be constructed in a manner which will minimise, as much as
possible, any disturbance to the local residents and road users. To minimise inconvenience to
the road user, three-way traffic flow will be maintained along the N7 and all existing traffic
movements at the junction will be facilitated within the proposed overall temporary traffic
December 2007 Page 74