Grand Rapids Medical Corridor North Pedestrian Tunnel
The Grand Rapids Medical Corridor North Pedestrian Tunnel is a tunnel in Grand Rapids, Michigan connecting the Lemmen Holton Oncology Center with Butterworth Hospital and Helen DeVos Children's Hospital.
 pedestrian tunnel under Michigan Street | |
| Overview | |
|---|---|
| Location | Grand Rapids, Michigan |
| Coordinates | |
| 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 | Spectrum Health |
| Character | pedestrian tunnel |
| Technical | |
| Length | 130 feet (40 meters) |
| Tunnel clearance | 20 feet |
| Grade | level |
Construction
The tunnel passes under Michigan Street, a busy thoroughfare. 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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