•To mitigate impacts at ground level, about 5 km of the 7.4 km railway will be constructed on viaduct.
•The ecological value of 28.5 ha of fishponds to the west of Lok Ma Chau Station will be enhanced to enable birds to feed on shallow water.
•Direct and disturbance loss of 1.7 ha of wetlands in Long Valley will be compensated by on-site and off-site reprovisioning. 2 ha of temporary wetland to the west of Long Valley will be created before construction starts, and 3.8 ha of permanent wetland will be made available below the viaduct and in meanders along River Beas.
•Wetland reprovisioning will be monitiored by bird specialists who are already using radio techniques to study movement of birds in the valley.
•Noise construction work will not be carried out during the birds breeding season.
•Except the foundation columns, the viaduct will be constructed by pre-casting method. To avoid heavy equipment on site, launching girders will be used to assemble the pre-cast elements similar to the construction of Hung Hom Bypass.
•Vehicle access to the valley will be restricted to the two ends of the narrow strip of railway land.
•KCRC will deploy environmental and community relations officers on site to supervise contractors' activities and to handle enquiries and complaints.
•Noise of a running train will be mitigated by low vibration track, floating slab track, train skirts and a multi-plenum system to attenuate airborne noise at source. Full enclosures will be installed at railway points and crossings.
•Visual impacts will be mitigated by trees/climbers planting below the viaduct and on columns and parapets, reinstatement of fishponds and integration of the viaduct design with the local environment.