Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across.
Follow Bertha Thank you for following Bertha. The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page.
Razor clam Impossibly good at digging by David Catchpoole Standing firmly upright in the shallows, the sharp shell of the appropriately-named razor clam can be a menace to unwary people wading barefoot or swimming at low tide.
The hurricane that was headed straight for us took a detour. It literally circled around us, for the most part leaving us alone. Our state as a whole was not so lucky.
Septic Tank lid locating and digging. Our expert technicians can locate & dig the Septic Tank lids for an additional fee. In a rare situation, excavation for your Septic Tank Lids requires heavy equipment and special care to protect your home and home site.
Design specifications and service. The Big Muskie was a model 4250-W Bucyrus-Erie dragline (the only one ever built). With a 220-cubic-yard (170 m 3) bucket, it was the largest single-bucket digging machine ever created and one of the world's largest mobile earth-moving machines alongside the Illinois-based Marion 6360 stripping shovel called The Captain and the German bucket wheel excavators ...
The actual digging of the well was less drama that I had imagined. Basically, the first tile is set in place and then workers dig under the bottom tile causing it to settle into the well hole.
Chris's Metal Detecting Page - Digging the Deep Coins - "Flying Blind"
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Gallery. A7V-Schützengrabenbagger LMG tracked trench cutting machine. Photo taken 28th October 1918 (source NARA) A7V-Schützengrabenbagger LMG trench cutter with its bucket jib in the raised position.
KAMY series of Roadheaders offers the best cutting performance in a wide range of rock formations. Equipped with geometrically optimized transverse or longitudinal cutter heads, these flexible machines can be used to excavate subway tunnels, road tunnels, railway tunnels and water tunnels without using explosives.