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The PortMiami Tunnel Boring Machine Cannot Be Used For Other Projects

Can The Tunnel Boring Machine that was used for the PortMiami tunnel be reused for other projects, such as a potential Miami River tunnel?

In short, the answer is no. “Harriet” (the TBM was named after Harriet Tubman by the Girl Scouts of South Florida) is no longer with us, according to Christopher Hodgkins, the CEO of Miami Access Tunnel.

After digging both directions of the PortMiami tunnel, the machine was “spent”. Harriet worked 20 hours a day for two years (with four hours of maintenance). Her teeth needed to be changed five times on the way to the port, and four times on the way back, Hodgkins said.

The machine was designed specifically for the hard stone geology on the area, and was dissembled following completion of her mission. The contractor recovered and recycled whatever they could, and scrapped the rest, in a disassembly process that took three months, according to Hodgkins.

The tunnel opened in 2014 and is credited with removing 80 percent of trucks from downtown Miami.

 

(photo: miami access tunnel)

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8 Comments on "The PortMiami Tunnel Boring Machine Cannot Be Used For Other Projects"

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marc
marc

A moment of silence for Harriet. RIP

City Commissioner
City Commissioner

How much did Harriet cost again? and we just tossed it?

City Citizen
City Citizen

I imagine Harriet’s return to the company was factored in the project’s cost in that, if we had for some reason decided to keep her, we would’ve had to pay extra. It’s also my understanding that these boring machines are fairly project-specific. Even if we had kept her, it’s not necessarily likely that we could’ve used her to bore the Brickell Ave tunnel or any other for that matter.

City Commissioner
City Commissioner

My point was not for Miami to keep the machine, but the company could have re-used it, not necessarily here in MIAMI…. anywhere! I understand these Machines are Strata specific but A Single-use 45 mil. machine seems like bad engineering. IMO

Anonymous
Anonymous

Those trucks didn’t disappear, they now clog I-395 every afternoon/evening leaving the beach.

Anonymous
Anonymous

yeah! now that drive on the 395 has everybody dodging the slow moving trucks leaving the tunnel

Anonymous
Anonymous

and the cabs trying to dart across 4 lanes to exit at Biscayne…

Alex

I Smell DOG POO… anybody who has watched a boring tunnel show on the discovery channel will clearly understand that is the most idiotic piece of fiction ever conceived by our GOVT.

so if the contractor recovered and recycled what he could, what happened to the proceeds or monies from the sales of the materials being that this would have been taxpayer money that should have been returned not money that the contractor could use to give himself a little kickback…

if he wanted a kickback he should have put it in his contract, a claus stating that a bonus would be given if he finished early.

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