My HOA hired a contractor to install a rain gutter drainage pipe underneath our concrete driveway. I have photos documenting every stage of the installation and would appreciate feedback from experienced contractors.
After excavating the trench and installing the pipe, the crew backfilled it with what appears to be excavated dirt, rocks, and chunks of broken concrete. They then placed rebar over the backfill and poured new concrete.
My main concerns:
- Pipe bedding: I didn't observe whether the pipe was placed on an appropriate bedding material or adequately supported.
- Backfill: The trench appears to contain large pieces of construction debris rather than properly graded aggregate.
- Compaction: I didn't observe any mechanical compaction before the concrete was poured.
- Rebar placement: The reinforcement appears to rest directly on the rocky backfill without chairs or other supports.
From what I've researched, proper pipe bedding, suitable backfill, and compaction are important when installing drainage pipes beneath vehicle traffic.
My questions:
- Is this an acceptable installation method?
- Are large chunks of broken concrete acceptable as backfill around a drainage pipe?
- Should the backfill have been mechanically compacted before pouring?
- Is the rebar positioned correctly?
- Based on these photos, would you consider this professional workmanship?
The HOA has dismissed my concerns, and I'd like independent opinions before pursuing a professional inspection.
Located in Colorado. Photos are arranged chronologically, showing the excavation, pipe installation, backfill, reinforcement, and concrete pour.
Thanks for any insight.