A wheel loader is tasked with re-handling processed sand to create a stockpile. If the sand has a high moisture content and a tendency to 'rathole' when handled, what is the best strategy for the operator to build a stable and safe stockpile?

Question: A wheel loader is tasked with re-handling processed sand to create a stockpile. If the sand has a high moisture content and a tendency to 'rathole' when handled, what is the best strategy for the operator to build a stable and safe stockpile?

Answer options:

• Build the pile as high and narrow as possible to reduce footprint.
• Build multiple, smaller conical piles to increase angles of repose. ✅ Build the pile in layers, compacting each layer with the loader tires as it's placed, ensuring a wide base and gentle slopes.
• Push the sand into one very large, steep pile to use the natural angle of repose.

Correct answer: Build the pile in layers, compacting each layer with the loader tires as it's placed, ensuring a wide base and gentle slopes.

Explanation: High moisture content can affect material stability. Building in layers with compaction helps consolidate the material, creating a more stable pile with a wide base and gentle slopes. This reduces the risk of 'ratholing' (a cavity forming within the pile) and pile collapse, which is a significant hazard in aggregate storage as per provincial OHS codes.