The silt removal is one component of a dam renovation project ... needs to be built to cross a stream and there needs to be a rock-lined access road. “It’s moving forward, finally,” said ...

Tunnel shields are built to slice through soft soil, like sand, clay, and silt. They're not strong enough to carve through a mountain of rock. In order to bore into this mountain, you need a ...

Erosion is the suspected culprit in Thursday's collapse of the arch -- a hole formed in the 190-million-year-old sandstone ...

The Darwin Arch, a natural rock in the Ecuadorean Province of Galapagos, has collapsed due to “natural erosion,” the Ministry of the Environment and Water reported late on Monday. “We inform ...