Grand Rapids Medical Corridor North Pedestrian Tunnel

Grand Rapids Medical Corridor North Pedestrian Tunnel
	pedestrian tunnel under Michigan Street
Overview
Location	Grand Rapids, Michigan
Coordinates	42°58′13.8″N 85°39′55.4″W / 42.970500°N 85.665389°W
Status	open
Start	Butterworth Hospital
End	Lemmen-Holton Cancer Pavilion
Operation
Work begun	15 December 2005
Constructed	excavated through grouted glacial till, shotcrete lined
Opened	26 May 2006
Owner	Corewell Health
Character	pedestrian tunnel
Technical
Length	130 feet (40 meters)
Tunnel clearance	20 feet
Grade	level

The Grand Rapids Medical Corridor North Pedestrian Tunnel is a tunnel in Grand Rapids, Michigan connecting the Lemmen-Holton Cancer Pavilion with Butterworth Hospital and Helen DeVos Children's Hospital.

Construction

The tunnel passes under Michigan Street, a busy thoroughfare in the Grand Rapids Medical Mile. Construction was accomplished using the New Austrian tunneling method without disrupting the traffic moving on the street above.^[1] The tunnel was mined^[2] through glacial till, which was grouted with sodium silicate to stabilize it prior to digging the tunnel.^[3] The tunnel is lined with 15 inches (380 mm) of shotcrete.

In 2007, it received the ABC/WMC Construction Award from the Associated Builders and Contractors–Western Michigan Chapter.

References

^ Almeraris, Gary; Mariucci, Bill, eds. (2009) [2007]. "NATM Through Clean Sands- The Michigan Street Experience". Rapid Excavation and Tunneling Conference: Proceedings 2007. SME. pp. 988–997. ISBN 978-0-87335-304-5.
^ "Grand Rapids Medical Corridor North Pedestrian Tunnel". Gall Zeidler Consultants. Archived from the original on 6 March 2012. Retrieved 4 July 2010.
^ Nicholson Construction (2010). "Michigan Street Tunnel". Retrieved 4 July 2010.

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[1] Almeraris, Gary; Mariucci, Bill, eds. (2009) [2007]. "NATM Through Clean Sands- The Michigan Street Experience". Rapid Excavation and Tunneling Conference: Proceedings 2007. SME. pp. 988–997. ISBN 978-0-87335-304-5.

[2] "Grand Rapids Medical Corridor North Pedestrian Tunnel". Gall Zeidler Consultants. Archived from the original on 6 March 2012. Retrieved 4 July 2010.

[3] Nicholson Construction (2010). "Michigan Street Tunnel". Retrieved 4 July 2010.

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