Internal Tree Decay Testing for Local Authority
Client: Local Authority, North West
Project Overview: A local authority had identified a significant mature tree in a public open space showing signs of progressive decline — including reduced crown vigour, deadwood, and fungal fruiting bodies at the base. The tree was in a high-footfall area and objective evidence of its structural condition was required before a management decision could be made.
Our Role: Urban Tree Management carried out a specialist internal decay investigation using Arbotom sonic tomography and IML Resistograph — mapping the internal condition of the stem at multiple assessment heights and confirming residual wall thickness through resistance drilling.
Findings & Recommendations:
- Significant internal decay confirmed at multiple assessment heights
- Residual wall thickness confirmed insufficient for continued retention
- QTRA risk assessment completed to quantify risk to public
- Full written report produced suitable for legal and insurance review
Outcome: The local authority received the objective, independently reproducible evidence needed to make a proportionate, defensible management decision in a high-profile public space — supported by a comprehensive written report documenting the methodology, findings, and decision-making process.
Work With Us
Urban Tree Management supports Local Authorities across the North West with advanced diagnostic investigations and defensible risk assessments for complex, high‑profile or safety‑critical trees. We understand the pressures placed on council tree officers: balancing public safety, statutory duties, budget constraints and increasing scrutiny over decision‑making. Our specialist services — including sonic tomography, resistograph micro‑drilling and QTRA risk analysis — provide clear, quantifiable evidence that strengthens case files, supports enforcement, and ensures decisions stand up to internal review, public challenge or appeal.
We work closely with planning teams, tree officers, highways departments, estates, parks and legal services, delivering transparent reporting, rapid turnaround times and clear recommendations grounded in best practice. Whether you require an independent diagnostic investigation, support with a contentious TPO case, verification of decay in a high‑risk location, or expert input for a public enquiry, we provide a reliable, professional service that integrates seamlessly with your existing processes.
Get in touch to discuss a case, request a quotation or arrange a diagnostic inspection.
