| Job Title |
Shield Runner |
| Job Description |
Sets Up And Operates Equipment To Advance Steel Framework
(shield) Within Tunnel During Construction: Turns Handcrank To
Regulate Hydraulic Valves That Advance Jacks Used To Push
Forward Tunnel Shield That Supports Overlying Ground During
Tunnel Construction. Moves Levers To Regulate Movement Of Steel
Arm Attached To Shield To Lift Metal Segments Of Tunnel Heading
Into Position.
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