Newlands Cross Upgrade EIS - European Investment Bank

South Dublin County Council N7 Newlands Cross Upgrade
Environmental Impact Statement
Arup Consulting Engineers
scheme will not have any significant detrimental effects on the playing of the course or it’s
amenity.
The proposed interchange will have a significant positive economic impact on a large number
of businesses in the local area (and regionally) due to improved journey time. A small
number of businesses on the north side of the Naas Road could be aversely impacted by loss
of driver familiarity and delays to access caused by the need to cross one set of traffic lights.
Where possible, the upgrade of Newlands Cross has been designed to avoid all properties. In
certain instances, land take has been unavoidable. It is these instances, where it is proposed to
acquire land from properties they are assessed in this study. The impacts vary and include
minor, moderate and major impacts at various properties. Access to all existing properties
will be maintained at all times during the construction phase. This may require temporary
alternate access arrangements at some locations. All access will be re-instated upon
completion of construction. Mitigation measures in the form of compensation are not part of
the EIS and are therefore not considered further in this study.
NTS14. SURFACE WATER AND DRAINAGE
Newlands Cross is located within the Camac River catchment and in proximity to the Dodder
River Catchment. Both of these rivers are tributaries of the Liffey River. Both of these rivers
are noted for their amenity and ecological value within the Greater Dublin Metropolitan Area.
There are no culverted watercourses in the vicinity of Newlands Cross and the proposed
junction upgrade will not change this. The existing drainage for the N7 at Newlands Cross
enters the Camac River catchment via two outfalls; Fonthill Road drains directly to the Camac
River and an outfall at the corner of the Belgard Road and N7. This outfall flows into
Ballymount Park’s surface water system which subsequently feeds into the Camac River in
Walkinstown.
The proposed junction upgrade will increase the impermeable road surface which will
subsequently increase surface water flow to the river system. The new drainage system will
incorporate flow attenuation measures to maintain the current flow rate in accordance with
design storm return period standards outlined by South Dublin County Council and the NRA.
The potential pollution of surface water during the construction phase will be mitigated by the
provision of appropriate controls and working methods. These methods will be addressed by
the contract documents and includes the bunding around diesel/petrol storage tanks and
vehicle maintenance. Petrol interceptors, silt traps and emergency spill facilities will be
incorporated into the drainage scheme to contain any accidental spillages and runoff from the
paved areas associated with the proposed junction upgrade during the operational phase.
NTS15. INTERACTION OF EFFECTS
This section addresses the environmental aspects that are not specifically addressed in the
individual specialist sections of the EIS and also the environmental aspects that are considered
to be interactions between specialist subjects.
Only topics, which could be logically linked to the proposed upgrade have been considered
and examined in detail. Accordingly, where a topic is not mentioned, it has been concluded
that no potential for impact exists.
Human Beings and Health are addressed throughout the EIS, but not specifically in one
section, e.g., the economic and social considerations are detailed in the Material Assets
Chapter. The effects of the development on Human Beings with regard to Traffic & Transport,
Noise & Vibration, Landscape & Visual, Air Quality and Climate are also addressed in their
respective chapters.
December 2007 Page NTS11