Gwangju City Conducts Detailed Inspection of Aging Sewage Pipelines

Targeting a 228km Section Including Areas with Subsidence Occurrences

Gwangju City Hall

[Asia Economy Honam Reporting Headquarters Reporter Park Seon-gang] Gwangju Metropolitan City announced on the 11th that it began a detailed investigation of aging sewage pipelines on the 7th to prevent ground subsidence (sinkholes) caused by deteriorated and defective sewage pipelines in urban areas, alleviate citizens' anxiety, and ensure the safety of underground facilities.

The investigation will continue until October and targets 228 km sections of sewage pipelines that are over 20 years old and have recently experienced subsidence or are located in areas with frequent complaints by district, where defects due to aging pipelines are highly likely.

In particular, a 20 km section of sewage pipelines with a diameter of 1000 mm or more will be inspected visually, while a 208 km section of pipelines with a diameter less than 1000 mm will be examined using closed-circuit television (CCTV) for detailed inspection. Additional investigations such as GPR (Ground Penetrating Radar) surveys will be conducted in areas suspected of ground subsidence.

Based on the detailed investigation results, Gwangju City will establish repair plans according to the severity and urgency of defects such as damage or leakage within the sewage pipelines and will develop phased maintenance plans for systematic repairs.

Furthermore, the city will secure national funding through consultations with the Ministry of Environment to promote sewage pipeline maintenance projects.

Previously, Gwangju City surveyed 347 km of the 1796 km of sewage pipelines over 20 years old by 2017 as the first phase and has been conducting maintenance projects based on those results.

This investigation is expected to strengthen sewage safety management and enhance citizen safety.

Kim Jae-sik, head of the city's Sewage Management Division, said, “Since ground subsidence directly affects citizens' safety, we will promptly repair aging sewage pipelines based on the detailed investigation results to alleviate citizens' anxiety.”

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