Common drain repairs problems in Bolton
- ✓ Root damage to Victorian clay in Astley Bridge and Bromley Cross hillside drainage
- ✓ Collapsed valley-floor clay mains requiring excavation and replacement
- ✓ Millstone grit excavation challenge making relining particularly cost-effective in upper Bolton
- ✓ Post-war concrete deterioration in Farnworth and Kearsley
- ✓ Horwich industrial connection legacy repairs