He has designed each cage so that a plastic tray for gravel can be slid into the bottom.
This method worked well for digging soft dirt and gravel near the street surface.
They were loading rock for gravel that day and the cart was almost too heavy for four men to pull.
The lakes were created by dredging for sand and gravel between the 1960s and the 1980s.
Tanem has also been a site of strip mining for high-quality gravel and sand during the last 30 years.
It was created by excavating for gravel and sands between 1926 and 1973.
In the 20th century, the outskirts of the city become filled with open pit mines for gravel and sand.
During the 1980s oil drilling activity occurred and people used the area as a source for rock and gravel.
They came up with some cost figures: as high as $150,000, with $2,000 to $3,000 for gravel alone.
You may have to settle for gravel, they've got plenty of that.