Completed Projects

Sedimentation pond

Six Bells, Gwent

A gravity flow of mine water from abandoned coal workings containing 50 mg/l dissolved iron seriously downgraded the River Ebbw Fach. In addition, the presence of H2S had been reported by local residents.

The treatment system abstracts mine water from a 230 metre deep borehole steered into an underground roadway. Treatment involves oxidation of dissolved iron and H2S by the injection of Hydrogen Peroxide into the discharge. Settlement of solids is in sedimentation ponds with tertiary treatment on a wetland prior to discharge. The commissioning of the site is now complete.

Awaiting Image

Acomb Mine, Northumberland

The discharge from the former Acomb adit devastated the quality and amenity of Red Burn through the urban area of Acomb Village. A study into treatment of the discharge and a detailed design was conducted. A pumping scheme located in the mine adit will discharge water to an aeration cascade with settlement in sedimentation ponds and tertiary treatment on a wetland. Construction of the scheme valued at £0.5m has now been completed and the system has operated satisfactorily for over 12 months.

Other Completed Schemes

Other schemes which have been designed and constructed by WYG staff include: