Detailed Design Stage
1. Implementation of comprehensive Tree Survey Report at an early stage in
accordance with Works Branch Technical Circular No. 24/94 to ensure specific
recommendations for existing trees are resolved before construction. Careful and efficient transplanting of
affected trees at an early stage to appropriate locations in or outside the
site area. Transplant affected trees
that are worthy of retention (in terms of form, health and size) and that have
a good chance of survival after transplanting.
Government guidelines on the preservation and felling of trees are
detailed in Government General Regulation 740, Works Branch Technical Circular
No. 24/94 and Planning Environment and Lands Branch Technical Circular No.
3/94. Transplanting works should be
carried out under the supervision of a landscape architect.
2. Amenity areas to be provided to visually reduce the scale of the
roadworks. Screen trees to be provided
adjacent to the Police Officers Club to screen the elevated structures.
3. Soil mounding at expansive amenity areas or where appropriate to further
reduce the scale of elevated structures and on grade roads.
4. Planting schedule should be suitable to the environmental conditions,
that is, climbers on columns of elevated structures, roadside planting, and
under elevated structure planting. The
planting should provide variety in form, colour and texture and should contain
a high proportion of evergreen species to provide an all-year-round urban ‘green’
effect. The planting schedule should
integrate with the landscape design of the interface projects such as CRIII and
WDII. Planting schedule should also
comply with maintenance requirements and sightlines requirements of Leisure and
Cultural Services Department (LCSD).
Reference should be made to LCSD’s Annex 1 (General Requirements of Soft
Landscaping Design for Areas Under LCSD’s Maintenance Responsibilities) and to
HyDTC No. 6/98 on Visibility of Directional Signs.
5. Integrated design solution of engineering structures including elevated
structures, administration and ventilation buildings, noise barriers, abutment
walls, tunnel portals and a screen panel wall.
The designs are subject to the approval of the Advisory Committee on the
Appearance of Bridges and Associated Structures (ACABAS).
6. Soft landscape design around administration and ventilation buildings to
compliment the architectural finishes and to reduce their scale and visual
impact.
Tender Preparation Stage
1. The Engineer / Consultant is responsible to supply the Contractor with construction
specifications and accurate construction drawings.
2. The recommended mitigation measures should be included into the Contract
clauses where the Contractor is responsible for their implementation.
Construction Stage
1. Approved new soil-mix for new planting areas.
2. The existing trees recommended to be retained should be protected by
means of fencing to prevent vehicular, construction machines or pedestrian
intrusion which may potentially damage tree canopies, trunks and root zones.
3. Advance planning and programme for transplanting of existing trees and
reinstatement of roadside planting to early completion areas or unaffected
site.
4. Erection of screen hoarding, where appropriate, with surface treatment
suitable to the urban context.
5. Control of night lighting. Use
lighting system to divert the light from adjoining residential and hotel
developments at night.
6. ET and IC(E) should make monthly on-site visits to audit the recommended
mitigation measures are implemented effectively as recommended in the approved
EIA report and as per the construction programme.
Operation Stage
1. A landscape architect should make monthly on-site visits (within the 12
months establishment period) to monitor the condition of the transplanted trees
and newly planted vegetation before handing over the responsibility of
maintenance to the relevant government department.