Onion Creek
Wastewater Tunnel Emergency Bypass
Austin, Texas
Client
City of Austin
Arizpe provided construction inspection services for this project to remove dislodged Schlegel liner (plastic tunnel liner) which threatened to completely block the Onion Creek wastewater tunnel. City of Austin officials declared this liner removal to be an emergency project. The bypass pumped 32 million gallons per day and included design, fabrication, and installation of a forty-foot high bulkhead for the sewage bypass pumping system. A unique Geographic Information System (GIS) was used with fiber optic transmission to monitor underground personnel, equipment and to ensure safety. The project achieved early job completion without any safety incidents.
