Ecological surveys and mitigation for A66 Northern Trans-Pennine project
Background
The A66 Northern Trans-Pennine project is a Nationally Significant Infrastructure Project to upgrade over 20 miles of road between Penrith and Scotch Corner into a dual carriageway. Delivered by National Highways in partnership with Amey, Arup, and Pinsent Masons, the project enhances safety, reduces congestion, and improves journey reliability.
Ecological sensitivities included protected species, habitats, and areas of archaeological significance. ADAS supported Amey and RSK Structural Soils by providing expert ecological services during key phases of the project to ensure compliance with environmental regulations and best practices.
Our role
Bat surveys
- Conducted over 200 nocturnal and tree climbing assessments to assess bat activity and potential roosts.
- Provided detailed project design recommendations to ensure compliance with protected species legislation.
Ecological Clerk of Works (ECoW) and mitigation
- Conducted a comprehensive review of existing ecological data to identify gaps and risks.
- Developed a Precautionary Working Method Statement (PWMS) to safeguard wildlife during construction.
- Delivered two ECoWs over six months to support pre-work ecological surveys and on-site monitoring.
- Secured an otter mitigation licence to protect a holt, ensuring compliance with the Wildlife and Countryside Act 1981.
Results
Our work facilitated the successful mitigation of ecological risks, enabling uninterrupted progress on a 30-week, £16-million ground investigation. Working with project stakeholders, including National Highways, we achieved:
- Full compliance with environmental legislation.
- Protection of protected species, including bats and otters.
- Streamlined project delivery with minimal ecological delays.
This collaboration underscored our ability to integrate robust ecological practices into complex infrastructure projects, balancing environmental protection with project efficiency.