https://www.gov.uk/government/case-studies/saltburn-gill-mine-water-treatment-scheme
Saltburn Gill mine water treatment scheme - Case study - GOV.UK
Saltburn Gill mine water treatment scheme removes more than 98% of iron from local waterways in East Cleveland, England.
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https://www.woodlandtrust.org.uk/visiting-woods/woods/saltburn-gill/
Saltburn Gill - Woodland Trust
saltburn gillwoodlandtrust