Job Description:

• 1) Drills and blasts earth and rock excavations to construct underground shafts and tunnels for projects, such as roads, railways, and waterways: Sets up pneumatic drilling machinery and moves lever controlling drilling action to drill blastholes in tunnel heading according to spacing, angle, and depth of hole specified by SUPERVISOR, TUNNEL HEADING.

• 2) Loads blastholes and fires powder charges to loosen earth and rock.

• 3) Wedges, nails, or bolts timber or steel retaining structures to prevent cave-ins.

• 4) May work in caissons.

• 5) When concerned with erection of breast boards to shore tunnel heading, may be designated Breast Worker.