River Erosion Threatens Trikora Bridge in Batang Toru

The heavy currents of the Batang Torum River have left serious problems around the Trikora Bridge, located in the Batang Toru District, South Tapanuli Regency, North Sumatra. Aerial observations reveal that the riverbanks around the bridge are experiencing significant erosion and scouring.

Soil material on the riverbanks appears to have been eroded, forming steep cliffs. Numerous logs and drifted debris are also visible trapped along the riverbanks. This condition indicates the intense pressure exerted by the current against the banks, particularly when water levels rise.

At the top of the banks, residential areas are located relatively close to the river’s edge. The ongoing erosion has the potential to widen the affected area if not addressed immediately. Mail Hasibuan (47) noted on Saturday (12/9) that the Trikora Bridge is a vital component of the transport access for the Batang Toru community, serving as a main route to Sibolga City and vice versa. Consequently, the environmental condition around the bridge’s foundations and approach roads requires serious attention, especially following extreme weather and increased water discharge in the Batang Toru River.

Therefore, a technical inspection is required to determine whether the erosion has affected the foundations, abutments, or the bridge’s protective structures. The North Sumatra Provincial Government and the Central Government, along with relevant technical agencies, are deemed to need a comprehensive assessment. This should include examining the depth of the scouring, bank stability, the condition of the abutments and foundations, and the necessity for bank protection construction.

The issue is not merely whether the bridge remains passable. Construction safety and the sustainability of public access must be prioritised before the river erosion evolves into a greater threat. The field conditions serve as a reminder that post-disaster management must involve more than just restoring access; riverbanks and bridge protection systems must also be reinforced to prevent similar damage from recurring.