Common blocked drains problems in Bolton
- ✓ Debris wash from higher ground blocking drains in Halliwell and valley-floor terraces
- ✓ Root intrusion in Victorian clay systems throughout Bolton's older residential areas
- ✓ External gully blockages from autumn leaf fall on Bolton's hillside streets
- ✓ Grease and silt accumulation in valley-floor combined sewer drainage
- ✓ Shared terrace drain blockages in Bolton's inner-area housing