1.2 km-long, 3.2 m-diameter segmentally lined 23rd Avenue stormwater storage tunnel bored by City of Edmonton using their 25 year-old Lovat M126SE EPB has holed into 5.5 m-diameter removal shaft at 19th Avenue and Gateway Boulevard. Ground comprised clay with boulders, contaminated soils and wet moving sands. Machine is being transferred to Calgary, Alberta for a similar 900 m-long storage tunnel. Visit www.lovat.com 20/05.
