| Document Reference | TRQ-2025-003 | Inspection Date | 10 April 2025 |
| Client Reference | Sample / Demo | Report Date | 14 April 2025 |
| Assessed By | Tree Risk QTRA | Status | Final — Version 1 |
| Trees Assessed | 7 | Site Type | Public Open Space / Council Park |
This report has been prepared by a QTRA-certified practitioner. Tree Risk QTRA is an independent forestry consultancy — we perform no removal, pruning or other arboricultural works. Our only product is honest, accurate risk advice. This sample report has been produced for demonstration purposes using fictional site data.
A total of 6 trees were assessed at Rotary Park, Coolum Beach QLD 4573 on 10 April 2025. The property is an established urban residential allotment with a mixed canopy of native and exotic species. Trees were assessed using the Visual Tree Assessment (VTA) methodology and the Quantified Tree Risk Assessment (QTRA) system.
| Rating | No. | % |
|---|---|---|
| Valuable | 2 | 33% |
| High | 1 | 17% |
| Medium | 1 | 17% |
| Low | 2 | 33% |
| Category | No. |
|---|---|
| Broadly Acceptable | 5 |
| Tolerable | 1 |
| Unacceptable | 1 |
| None | 0 |
| Priority | No. |
|---|---|
| High | 1 |
| Moderate | 1 |
| Low | 3 |
| None | 2 |
Tree Risk QTRA has been engaged by Sunshine Coast Council to undertake a Tree Risk (QTRA) and Works Priority Assessment of seven trees at a public park reserve. Given the high level of public use at this site — including children's playground facilities — accurate risk quantification is essential for council's duty of care obligations. The assessment was carried out on 10 April 2025 by a QTRA-certified practitioner.
The assessment was carried out on 10 April 2025 by a QTRA-certified practitioner. All trees were assessed individually using the Visual Tree Assessment (VTA) methodology, with risk quantified using the Quantified Tree Risk Assessment (QTRA) system in accordance with QTRA Ltd (2015).
Subject trees were inspected using the Visual Tree Assessment (VTA) methodology developed by Mattheck and Breloer (1998). Each tree was assessed for species, age class, health, structure, defects, proximity to targets, and arboricultural value. A Quantified Tree Risk Assessment (QTRA) was completed for each tree, producing a Risk of Harm (RoH) value expressed as a probability comparable to accepted tolerability thresholds.
The park supports a diverse canopy of native species including two significant Brush Box (Lophostemon confertus), a veteran Moreton Bay Fig (Ficus macrophylla) of outstanding heritage value, and mature Eucalyptus grandis. One Flooded Gum (Tree #4) located directly adjacent to the playground presents advanced basal decay with visible fungal fruiting bodies and is assessed as presenting an Unacceptable risk. This tree requires immediate action.
Target occupancy throughout the park is high, particularly in the playground and BBQ areas. This elevated target occupancy is the primary driver of risk ratings at this site and has been incorporated into each QTRA calculation.
Of the 7 trees assessed, one (Tree #4, Eucalyptus grandis) presents an Unacceptable risk and requires immediate removal — the surrounding area should be cordoned off until works are complete. One tree (Tree #6, Casuarina cunninghamiana) presents Tolerable risk requiring moderate priority works within 3 months. Four trees require low priority works and one requires no works. The veteran Moreton Bay Fig (Tree #5) is of exceptional significance and should be considered for heritage listing.
All pruning works should be undertaken by a qualified arborist in accordance with AS 4373-2007 Pruning of Amenity Trees. All retained trees should be re-inspected within a two-year timeframe.
The following table summarises the assessment findings and recommended works for all trees assessed. Works are prioritised as High (immediate action), Moderate (within 3 months), Low (within 12 months) or None (no works required at this time).
| ID | Botanic Name | Common Name | DBH | Ht | Health | Structure | Arb Value | Risk Category | Works Priority | Works Required |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | E. tereticornis | Forest Red Gum | 85cm | 18m | Good | Fair | Valuable | Broadly Acceptable | Low | Minor deadwood removal |
| 2 | E. tereticornis | Forest Red Gum | 72cm | 16m | Fair | Fair | High | Broadly Acceptable | Low | Remove codominant stem |
| 3 | Angophora costata | Sydney Red Gum | 95cm | 22m | Good | Good | Valuable | Broadly Acceptable | None | No works — monitor |
| 4 | Casuarina cunninghamiana | River Sheoak | 38cm | 12m | Poor | Poor | Low | Tolerable | Moderate | Reduction pruning |
| 5 | Livistona australis | Cabbage Tree Palm | 28cm | 9m | Good | Good | Medium | Broadly Acceptable | Low | Remove senescent fronds |
| 6 | Liquidambar styraciflua | Liquidambar | 55cm | 14m | Fair | Poor | Low | Unacceptable | High | Removal recommended |
Quantified Tree Risk Assessment (QTRA) is an internationally recognised tree risk management framework that applies established risk management principles to tree safety. The assessment produces a Risk of Harm (RoH) value — a numerical probability comparable to everyday risk benchmarks.
| QTRA Threshold | Risk Category | Action Required |
|---|---|---|
| >1/1,000 | Unacceptable | Immediate action required |
| 1/1,000–1/30,000 | Tolerable | Works within 3 months recommended |
| <1/1,000,000 | Broadly Acceptable | No immediate action — monitor and re-inspect |