Stockpiles should be placed in a manner that will minimize (or prevent) segregation and degradation.

Segregation.

The separation of the different sized aggregate particles. Segregation would result in one part of the stockpile containing only the coarser particles and another area containing only finer particles. Ideally, any sample taken from any area of the stockpile should contain a representative sampling of the complete range of sizes.

Degradation.

The breaking apart of the aggregate particles. This, of course, would result in a finer gradation of aggregate than desired. Degradation occurs most commonly from improper operation of the front loader, rather than improperly constructed stockpiles. Figure 6-1 shows a properly placed stockpile. Note the series of loads that have been placed adjacent to each other. Stockpiles should not be placed in one high cone-shaped heap, because segregation is almost certain to occur.