Assessment of the Structural Integrity of Ageing Jetties and Marine Berths in Ogun State

Port infrastructure including jetties and marine berths deteriorates over time due to environmental exposure, loading cycles, and inadequate maintenance, posing safety risks to vessel operations and port workers. This study assesses the structural integrity of ageing jetties and marine berths at selected inland ports and waterway landing facilities in Ogun State, South West Nigeria. A descriptive field survey design was employed, using visual structural inspection, concrete coring, and measurement of corrosion damage to steel piles at six jetty structures in Ijebu-Ode, Sagamu, and Abeokuta waterway areas. Inspection findings were categorised using a standard structural condition rating system, and repair urgency classifications were assigned. Secondary data on construction history and previous inspection records were obtained from the Ogun State Ministry of Works and waterway infrastructure records. Findings indicate that three of the six inspected structures are in a condition warranting immediate restriction of heavy vehicle access and that one jetty exhibits advanced pile corrosion that constitutes a collapse risk under full loading. Only one structure has been formally inspected within the past ten years. None of the jetties have implemented cathodic protection to arrest steel pile corrosion. Recommendations include urgent structural repair of the two most critically deteriorated structures, implementation of a biennial structural inspection programme for all state-owned jetty infrastructure, and installation of impressed current cathodic protection systems on steel-piled berths. Keywords: jetty structural integrity, ageing infrastructure, Ogun State, corrosion, cathodic protection