Table 4.11 Summary of Land-based dolphin behavior and movement monitoring across the bridge alignment before, during and after bridge construction

Land-based dolphin behavior and movement monitoring	Monitoring Period	Monitoring Details
Baseline (before bridge construction)	Dec 2012 – Jan 2013	i) 30 consecutive days before bridge construction (i.e. before start of bored piling activities)
Impact (during bridge construction)	Mar 2013 – Aug 2016	i) 30 days from the start of bored piling activities in the waters to the west of Airport; and ii) 64 days (twice per month) throughout the bridge construction period (Remark: the pile cap and pier construction under Contract HY/2011/09 were completed in May 2016)
Post-construction (after bridge construction)	Sept 2016 – August 2018	i) 48 days (twice per month) after completion of bored piling activities