The S2S project is an interim scheme comprising elements of two projects, the Dollymount
Promenade & Flood Protection project (DPFPP) and the North City Arterial Watermain (NCAM) both
of which have planning approval from An Bord Pleanala. Subsequent to the planning approval by An
Bord Pleanála of the DPFPP in December 2011, Dublin City Council (DCC) and the National Transport
Authority (NTA) received Part 8 Planning approval for an Interim scheme in May 2013.
The scope of works include the construction of two new sections of retaining wall and improvements
to the existing sea defence wall. These works include height adjustments to the existing sea wall to
ensure a statutory minimum level of flood defence is provided, the 200 year tide level plus an
allowance for global warming sea level rise to the end of the century
A brief description of the adjustments to the wall heights are detailed in the bullet points below:

Wooden Bridge to Seafield Road East Junction
The first 25m of the existing sea wall will not be adjusted in height. The section north of this
first 25m will be raised slightly but will not exceed the level already in place for the first 25m
of wall. The wall height adjustment varies from 30cm up to 45cm. The height of the new wall
will be approximately 62.5cm above the completed footpath.

Seafield Road East Junction to Dollymount Avenue Junction
The height of the southern section of wall along this section will be adjusted upwards with a
maximum height increase of 27cm above the existing wall height. Along the existing green
area where no sea defence wall currently exists, a new sea defence wall will be constructed
adjacent the lagoon and an amenity space created. This new wall will have a height of
approximately 56cm above the completed footpath level. The new sea defence wall ties in
with the existing seawall just north of the existing pump house and the new wall will tie in at
the same height as the existing sea wall already in place opposite Dollymount Avenue.

Dollymount Avenue Junction to Mount Prospect Avenue Junction
The southern section of wall (incorporating the access point to the lagoon) will be adjusted
upwards by up to 20cm to the location where there is an existing height change in the
existing wall opposite 411 Clontarf Road. The existing wall height will be maintained from
this point north to Mount Prospect Avenue. This 300m section of existing wall is
approximately 80cm above the existing footpath and this will be reduced slightly once the
works are completed.

Mount Prospect Avenue to St. Anne’s Park Car Park
The existing road carriageway level alongside St. Anne’s Park is lower than the existing
Clontarf Road south of Mount Prospect Avenue. Therefore, the existing sea wall adjacent St.
Anne’s Park will be adjusted by up to 70cm to provide the proposed level of flood
protection. At the northern end of this section of works, a new seawall is currently being
constructed. Once completed, this height of this section of wall will be approximately 85cm
above the finished footpath level. Due to the existing incline on the James Larkin Road at
this bend and the fact that the wall has yet to be backfilled and the footpath completed; the
current height of the wall appears greater than when the works will be completed .
The existing road pavement levels will also be altered upwards by approximately 2-4cm which will to
some degree mitigate against the increase in the seawall height. As can be seen from the heights of
the wall above the proposed footpath level the height of the completed wall alongside St. Anne’s
Park will appear higher than the completed sea wall south of Mount Prospect Avenue due to lower
road levels alongside St.Annes Park.
Update on STS cycle path, Works Starting on 27th April.
============================================
Brief outline of the works is as follows;
The scheme on behalf of Dublin City Council (DCC) and the National Transport
Authority (NTA) started back in 2006 and resulted in a planning approval being
granted by An Bord Pleanála in December 2011 to the Dollymount Promenade & Flood
Protection Project (DPFPP). This 2km promenade will provide an environmentally
sustainable solution for a segregated cycle track and promenade from the Wooden
Bridge to Causeway Road on the seaward side of the Clontarf Road and James Larkin
Road.. The DPFPP have also provided improved flood defence over the full length of
the scheme which included repairs to the existing sea walls and new retaining wall
construction at the northern & southern end of the site. The current wall to be
retained varies in level and will require height adjustments at various locations.
Details of wall height adjustments are provided below.
The segregated cyclist facility consists of a 4.0m wide two-way cycle track with a
resin bound surface and associated road markings and signage. The pedestrian
facility will consist of a 2m wide concrete footpath along the length of the route. The
existing road carriageway width will be reduced to accommodate the facility. The
project will require the modification of the existing junctions at Bull Road and
Dollymount Park. A number of build-outs are to be constructed along the eastern
side of the carriageway to facilitate uncontrolled/controlled pedestrian crossings and
bus stops with build outs on the west side to accommodate parking facilities for
resident and business owners. A new drainage system is to be provided including
connection to the existing drainage system and outfalls along the length of the route.
The existing culvert located opposite St. Anne’s Park is to be extended as part of the
works. St Annes Public Car-park will be suspended for the duration of the works to
accommodate Office & Welfare Units for the Management & Construction based
operatives.
KN Group on behalf of Dublin City Council have been appointed as the main
contractor to carry out the construction works with Roughan O’Donovan Consulting
Engineers planning & overseeing the works. The Project is scheduled to begin on the
27th of April 2015 for a duration of 16 months. Works in the Bull Lagoon area
restricted from April to September so the primary focus is to complete the
construction of the retaining walls and remedial works within this timeframe. Works
on the cycle & footway route will begin at the end of May commencing at the northern
end of the site with replacement footpath works on western side of the carriageway
working concurrently.
A letter drop informing residents & business owners shall be distributed before the
main construction works commence.
Wall height adjustments are as follows;

Bull Island Junction to Seafield Road East Junction: Level adjustment of 250mm.
First 25metres no level change.

Seafield Road East Junction to Dollymount Park Junction: Level adjustment of
250mm & new wall construction.

Dollymount Park Junction to Doyle’s Lane Junction: New wall construction to
match existing wall heights

Doyle’s lane Junction to Dollymount Avenue Junction: New wall construction for
55metres to match existing levels, no level adjustment to retained wall

Dollymount Avenue Junction to The Oaks Junction: First 80metres level
adjustment of 250mm. Remainder of wall, level unchanged

The Oaks Junction to Mount Prospect Avenue Junction: No level change

Mount Prospect Avenue Junction – Nannihen Stream: Level adjustment of
450mm.