ARC LICO was commissioned by the China Railway Design Corporation (CRDC) to conduct a comprehensive Heritage Impact Assessment (HIA) and Archaeological Impact Assessment (AIA) for the Philippine National Railways (PNR) South Long Haul (SLH) Project—an ambitious 556.8-kilometer railway traversing Muntinlupa, Laguna, Quezon, Camarines Sur, Albay, Sorsogon, and Batangas. Our scope covered extensive site mapping, condition surveys, archival and historiographical research, stakeholder coordination, and risk evaluation across 86 identified cultural and archaeological sites along the proposed alignment.