By rosebell
Over than 50% of shaft excavation on the Ellicott City North Tunnel Project in Maryland, which are the 49m-deep shafts and are due to provide the TBM launch and retrieval sites for the water project, has been completed by Kiewit-Traylor Bros Joint Venture.
At the moment a 91.5m-long Robbins main beam TBM named Rocky is undergoing a full overhaul and the planned date for its arrival to Ellicott City is the autumn. Rocky is going to dig a 1.768km-long, 5.5m-diameter tunnel through solid granite, approximately 46m below the surface.
In order to helping protect Ellicott City’s Main Street from flooding by channelling water underground, the North Tunnel will be capable of diverting 26,000 gallons of water per second to the Patapsco River after completion.
As the single largest public works project in Howard County’s history, the Extended North Tunnel Project is the focal point of the Safe and Sound plan. The date of commencing this project was June last year and it is due to be completed in autumn 2027.
