Ecological Due Diligence Surveys for Ground Investigation Works

Hydrock on behalf of Wales and West Utilities

Keystone Ecology were contracted to carry out Ecological Due Diligence Surveys in respect of ground investigation works at a Glenfrome Gas Works, Bristol.

What did we do?

• We carried out an Extended Phase I Habitat Survey and desk study to enable the determination of ecological impacts, guide selection of mitigation options and identify requirements for further ecological survey if required.
• Produced a Precautionary Working Method Statement (PWMS) to:
  Prevent the killing and injury of Great Crested Newts and reptiles;
  Minimise habitat loss that could potentially be used by Great Crested Newts and reptiles, in the case of the former, to ensure habitat loss remains within the parameters for a PWMS to be acceptable;
  Avoid destroying/disturbing Badger setts.

How did we do it?

• Liaised closely with Hydrock contract managers to devise site investigation working methods that could progress under a PWMS and thereby avoid the need for further survey/consultation with regulators in respect of Bristol Wildlife Networks Site, Broadleaved Woodland, Great Crested Newts, reptiles, Badger, nesting birds and Japanese Knotweed.
• Carried out vegetation clearance under the PWMS using Keystone Habitats, our in-house ecological contracting team who are trained in precautionary working methods for protected species.

What were the outcomes?

• A potential delay in the start of investigation work due to the potential presence of various protected species was eliminated.
• The need to employ an Ecological Clerk of Works in addition to a vegetation clearance contractor was avoided and resulted in overall project cost savings.