Assessing the Impact of Urbanisation on Archaeological Sites in Port Harcourt Metropolis, Rivers State

Rapid urbanisation in Port Harcourt and its expanding metropolis has transformed the cultural landscape of Rivers State at a pace that outstrips the capacity of heritage management institutions to document or protect buried and surface archaeological resources. This study assesses the impact of urban expansion on archaeological sites and potential archaeological zones in Port Harcourt, using historical aerial photograph comparison, site condition survey, and interviews with construction contractors, community leaders, and NCMM officials. Historical maps and satellite imagery from 2000, 2010, and 2023 were compared to quantify land-cover change over a twenty-three-year period, revealing a sixty-four percent reduction in undeveloped land within the metropolitan boundary. Site visits to twelve previously recorded archaeological localities showed that six have been completely destroyed by construction, three partially impacted, and three partially preserved within undeveloped pockets. Contractor interviews confirmed that archaeological materials including ceramics, shell accumulations, and structural features are routinely encountered and destroyed during foundation excavation without reporting. The study frames these findings within recent urban archaeology and heritage rescue literature, calling for the adoption of mandatory archaeological impact assessment requirements in Rivers State planning law. Comparable urban archaeology programmes in Lagos and Abuja are cited as models, though both are acknowledged to have significant implementation gaps. Keywords: urbanisation, Port Harcourt, archaeological sites, heritage impact assessment, Rivers State.