Stone: Quantity of rock and gravel for a stream

Quantity of Boulders Used in a Stream

• Formula:
  • For every 10 feet (3.05 meters) of stream, allocate 1.5 tons (1.36 metric tons) of boulders.
  • Use the same 1:2:1 ratio as for the pond (large boulders : medium boulders : small boulders).

Quantity of Gravel Used in a Stream

• Formula:
  • Total tons of boulders in the stream × 30% = tons of gravel needed for the stream.
  • Example: If the stream requires 10 tons (9.07 metric tons) of boulders:
    • Gravel needed = 10 × 30% = 3 tons (2.72 metric tons).