Complex sentence: As of May 2009 while the project was still in its dredging phase, a total of about has been sand-filled and placed in the reclamation area, while about 35,000 tonnes of rock have been delivered to the site.
Split into simpler sentences: As of May 2009 the project was still in its dredging phase. To date, a total of about has been sand-filled and placed in the reclamation area, while about 35,000 tonnes of rock have been delivered to the site.