7.1 Introduction
7.1.1 The EIA has recommended the EM&A for
landscape and visual resources is undertaken during both the design,
construction and operational phases of the project. The design, implementation and maintenance of landscape
mitigation measures is a key aspect of this and should be checked to ensure
that they are fully realised and that potential conflicts between the proposed
landscape measures and any other project works and operational requirements are
resolved at the earliest possible date and without compromise to the intention
of the mitigation measures. In
addition, implementation of the mitigation measures recommended by the EIA will
be monitored through the site audit programme.
7.2.1
The Landscape and Visual Assessment
of the EIA recommended a series of mitigation measures to ameliorate the
landscape and visual impacts of the project.
These measures include the following:
¨
refinement of the
route alignment and design of associated structures to minimise loss of
woodland and other landscape resources;
¨
minimising working
areas as far as possible;
¨
protection and
retention of existing vegetation where possible;
¨
transplanting of
trees where appropriate;
¨
protection and
retention of existing natural rocky outcrops, slope profiles, vegetation,
landscape features;
¨
advance planting
and visual screening, where possible;
¨
compensatory
planting;
¨
sensitively
designed site hoarding, where possible; and
¨
grassing and
woodland planting of soil slopes and disturbed areas.
7.2.2
The
measures for both the construction and operation stage as recommended in the
EIA are summarised in Tables 7.1 and 7.2 below:
Table 7.1 Proposed Construction Stage Mitigation
Measures
No. |
Mitigation Measure |
CM1 |
Works areas to be confined
to the Limit of the Road Works Areas to minimise impacts on existing features |
CM2 |
Retention and protection of
topography and rock outcrops* |
CM3 |
Retention and protection of
existing stream courses* |
CM4 |
Retention and protection of
existing secondary woodland* |
CM5 |
Retention and protection of
existing plantation woodland* |
CM6 |
Retention and protection of
existing shrubland* |
CM7 |
Decorative hoarding along
publicly accessible boundaries of the site. |
CM8 |
Where trees are affected by the works,
those specimens that are both of high conservation/amenity value and also
stand a high chance of successful reestablishment should be transplanted to
other locations within the works limit. |
CM9 |
Topsoil stripped and stored
for re-use in the construction of the soft landscape works** |
CM10 |
Grass hydroseeding of
slopes within 3 weeks of completion. |
* Retention
and protection to include minimisation the extent excavation for temporary and
permanent works and necessary physical measures to prevent access into areas
outside the limit of works. Regular checks should be carried out to ensure that
the work site boundaries are not exceeded, hoarding is properly maintained and
that no damage is being caused to the these areas.
** The maximum height for the stockpile of
topsoil is up to 2000mm
Table
7.2 Proposed Operation Stage
Mitigation Measures
ID No. |
Mitigation Measure |
OM1 |
Planting of native shrub
species on newly formed and upgraded roadside slopes and areas disturbed by
the Works to compensate for shrub vegetation lost during construction. |
OM2 |
Planting of native woodland
species on newly formed and upgraded roadside slopes and areas disturbed by
the Works to compensate for woodland vegetation lost during construction. |
OM3 |
Infill planting of native
trees in areas of existing low shrub adjacent to the road, to mitigate for loss of landscape resource
and character, for visual screening and to enhance ecological diversity |
OM4 |
Tree and shrub planting to
screen the road, to provide visual interest and to provide shade and shelter. |
OM5 |
Sensitive architectural and
chromatic treatment of new road structures, bridge structures, abutments,
retaining walls |
OM6 |
Sensitive architectural and
chromatic treatment of noise barriers |
7.3.1
The landscape measures proposed
within the EIA to mitigate the landscape and visual impacts of the scheme
should be embodied into the detailed landscape design drawings and contract
documents including the protection of existing woodland area and trees, the
transplanting of existing trees and the planting of new trees and shrubs. Designs should be checked to ensure that the
measures are fully incorporated and that potential conflicts with civil
engineering, geo-technical, structural, lighting, signage, drainage, underground
utility and operational requirements are resolved prior to construction.
7.3.2
The design phase EM&A
requirements for landscape and visual resources comprise the audit of the
detailed landscaping specifications to be prepared during the detailed design
together with ensuring that the design is sensitive to landscape and visual
impacts and that landscape resources are retained as far as practicable. Monitoring of design works against the
recommendations of the landscape and visual impact assessments within the EIA
should be undertaken as and when the designs are produced to ensure that they
fulfil the intentions of the mitigation measures.
7.3.3
The landscape auditor shall review
the designs as and when they are prepared and liaise with the landscape architect
and design engineer to ensure all measures have been incorporated in the design
in a format that can be specified to the Contractor for implementation. In the event of a non conformity, the
Event/Action plan as detailed in Table
7.3 below should be followed.
Table
7.3 Event / Action Plan for Design
Phase
Action Level |
Landscape Auditor |
Project
Engineer (PE) |
Project Landscape Architect (PLA) |
Non Conformity (with Design Standards and
Specification) |
·
Identify Source ·
Inform PE and PLA ·
Discuss remedial actions with PE, PLA ·
Verify remedial actions when complete. |
·
Notify PLA ·
Discuss remedial actions with PLA ·
Ensure remedial designs are fully incorporated |
·
Amend designs ·
Discuss remedial actions with PE |
7.4.1
Baseline monitoring for the
landscape and visual resources will comprise a vegetation survey of the entire
selected route undertaken on an ‘area’ basis.
Representative vegetation types will be identified along with typical
species composition. An assessment of landscape character will be
made against which future change can be monitored. The landscape resources and elements of particular concern are to
be noted.
7.4.2 The landscape and visual baseline will be determined with
reference to the Tree Survey Report prepared during the Investigation
Assignment and the habitat maps and the landscape and visual impact assessments
included in the EIA Report.
7.5
Construction and Operational Phase Audit
7.5.1
A specialist Landscape
Sub-Contractor should be employed by the Contractor for the implementation of
landscape construction works and subsequent maintenance operations during the
24 month establishment period. It is
proposed that as the majority of the planting works are off-site, the planting
will be conducted with the first half of the construction contract. Thus, the establishment works will be
undertaken through the latter half of the construction contract and extend
throughout the Contractor’s one year maintenance period
which will be within the first operational year of the project. The intention is
to provide at least 24 months establishment period for the majority of the
planting works.
7.5.2
All measures undertaken by both the
Contractor and the specialist Landscape Sub-Contractor during the construction
phase and first year of the operational phase shall be audited by a Registered
Landscape Architect, as a member of the Environmental Team (ET) (see Section
1), on a regular basis to ensure compliance with the intended aims of the
measures. Site inspections should be
undertaken at least once every two weeks throughout the construction period and
once every two months during the operational phase. The broad scope of the audit is detailed below but should also be
undertaken with reference to the more specific checklist provided in Table 7.4.
Operational phase auditing will be restricted to the last 12 months of the
establishment works of the landscaping proposals and thus only the items below
concerning this period are relevant to the operational phase.
¨
the extent of the
agreed works areas should be regularly checked during the construction
phase. Any trespass by the Contractor
outside the limit of the works, including any damage to existing trees and
woodland shall be prohibited;
¨
the progress of
the engineering works should be regularly reviewed on site to identify the
earliest practical opportunities for the landscape works to be undertaken;
¨
all existing trees
and vegetation within the study area which are not directly affected by the
works are retained and protected;
¨
the methods of protecting
existing vegetation proposed by the Contractor are acceptable and enforced;
¨
preparation,
lifting transport and re-planting operations for any transplanted trees;
¨
all landscaping
works are carried out in accordance with the specifications;
¨
the planting of new trees, shrubs,
groundcover, climbers, ferns, grasses and other plans, together with the
replanting of any transplanted trees are carried out
properly and within the right season;
¨
all necessary
horticultural operations and replacement planting are undertaken throughout the
Establishment Period to ensure the healthy establishment and growth of both
transplanted trees and all newly established plants.
Table
7.4 Construction/Operational Phase
Audit Checklist
Area of Works |
Items to be
Monitored |
Advance planting |
monitoring of implementation and maintenance of
planting, and against possible incursion, physical damage, fire, pollution,
surface erosion, etc. |
Protection of all trees and woodland blocks to be
retained |
identification and demarcation of trees / vegetation
to be retained, erection of physical protection (e.g. fencing), monitoring
against possible incursion, physical damage, fire, pollution, surface
erosion, etc. |
Clearance of existing vegetation |
identification and demarcation of trees / vegetation
to be cleared, checking of extent of works to minimise damage, monitoring of
adjacent areas against possible incursion, physical damage, fire, pollution,
surface erosion, etc. |
Transplanting of trees |
identification and demarcation of trees / vegetation
to be transplanted, monitoring of extent of pruning / lifting works to
minimise damage, timing of operations, implementation of all stages of
preparatory and translocation works, and maintenance of transplanted
vegetation, etc. |
Plant supply |
monitoring of operations relating to the supply of
specialist plant material (including the collecting, germination and growth
of plants from seed) to ensure that plants will be available in time to be
used within the construction works. |
Soiling, planting, etc. |
monitoring of implementation and maintenance of
soiling and planting works and against possible incursion, physical damage,
fire, pollution, surface erosion, etc. |
Decorative treatment of site hoarding |
implementation and maintenance, to ensure compliance
with agreed designs and check that it matches the surrounding environment and
does not cause visual intrusion. |
Architectural treatment of retaining walls, elevated
road structures and other engineering works. |
implementation and maintenance of mitigation
measures, to ensure compliance with agreed designs. |
Establishment Works |
monitoring of implementation of maintenance
operations during Establishment Period |
7.5.3
In the event of non compliance the
responsibilities of the relevant parties is detailed in the Event /Action plan
provided on Table 7.5.
Table 7.5 Event / Action Plan for Construction/Operational Phase
Action Level |
ES |
IC (E) |
ER |
Contractor |
Non-conformity on one occasion |
1. Identify Source 2. Inform the IC(E) and the ER 3. Discuss remedial actions with the IC(E), the ER and the
Contractor 4. Monitor remedial actions
until rectification has been completed |
1. Check report 2. Check the Contractor's
working method 3. Discuss
with the ES and the Contractor on
possible remedial measures 4. Advise the ER on effectiveness of proposed remedial measures. 5. Check implementation of
remedial measures. |
1. Notify Contractor 2. Ensure
remedial measures are properly implemented |
1. Amend working methods 2. Rectify
damage and undertake any necessary replacement |
Repeated
Non-conformity |
1. Identify Source 2. Inform the IC(E) and the ER 3. Increase monitoring frequency 4. Discuss remedial actions with the IC(E), the ER and the Contractor 5. Monitor remedial actions until rectification has been
completed 6. If exceedance
stops, cease additional monitoring |
1. Check monitoring report 2. Check the Contractor's working method 3. Discuss with the ES and the Contractor
on possible remedial measures 4. Advise the ER on effectiveness of
proposed remedial measures 5. Supervise
implementation of remedial measures. |
1. Notify the
Contractor 2. Ensure
remedial measures are properly implemented |
1. Amend working methods 2. Rectify
damage and undertake any necessary replacement |
Note: ES –
Environmental Specialist, IC(E) – Independent Checker (Environmental), ER –
Engineer’s Representative