With the aging and deterioration of the facilities, road collapses have occurred due to faulty sewage pipes in addition to equipment failures occurring at wastewater treatment plants and pumping stations. The total length of the sewage pipeline in Sendai is 4,692 km, and about 220 km of the pipeline has exceeded its service life, and such cases are expected to increase in the future.
Improving the earthquake resistance of the sewage pipeline is an effective way to delay deterioration due to aging. Also, improving the earthquake resistance of the wastewater treatment plants and pumping stations together with their renewal contributes to reducing costs. In this way, scheduled improvement soft the earthquake resistance of facilities have been undertaking.
Inquiries Sewerage Planning Section,
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