Addressing Drainage Issues (Class 5 Aggregate Removal)

What happens here

After removing the retaining wall blocks, the crew inspects the drainage material behind the old wall. They discover that Class 5 aggregate was used, which is a mix of gravel and fine particles. Although technically considered free-draining, the presence of fine materials (dirt and sand) in Class 5 aggregate can impede proper drainage when compacted or in large quantities, contributing to water problems behind the wall. The previous builders also did not use enough of it. The crew begins to remove this Class 5 aggregate using shovels to loosen it, the mini excavator to dig it out, and the skid steer to scoop and remove it, sometimes assisted by manual shoveling into the bucket.

Goal: Remove unsuitable drainage material to improve water management behind the retaining wall.