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Failure of a HDPE liner within the Onion Creek Tunnel created an emergency situation for the City of Austin, TX. The dislodged liner threatened to completely block the tunnel and create massive overflows of sanitary sewage. The City, therefore, needed to rapidly extract this obstructing material, determine the cause of the liner failure, and assess the condition of concrete tunnel walls which had been in service for 14 years. The contractor developed an innovative underground work station that featured an effective means of communicating with a Topside Control Center. Confined Space safety measures were of paramount importance. The work was completed without injury and well ahead of schedule.

Document Type: Research Article


Publication date: 2005-01-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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