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TBM Reaches Retrieval Shaft in Edmonton

The TBM has successfully reached the retrieval shaft on the 23rd Avenue Storm Sewer Design Build Project.

This Design Build Contract with the City of Edmonton was awarded to Dibco-CRS, a Joint venture and includes the construction of a 215m long x 3.0m I.D. segmentally lined tunnel, between shafts 6A and 6C, using a RME 137SE Earth Pressure Balance (EPB) Tunnel Boring Machine.  Other works to be performed on this project consists of the completion of Shaft 6A and enlarging the Retrieval Shaft (6C) from 4.5m to 8.0m ID. The 3m ID segments for the project were cast locally at Lafarge Canada Inc.