New Zealand’s forestry industry is a cornerstone of our export economy, contributing over $7 billion annually. But before a single log can be harvested, there needs to be a road to get there — and on the East Coast, that is no small task.
The Challenge of East Coast Terrain
The East Coast of the North Island presents some of the most demanding terrain for road construction anywhere in New Zealand. Steep gradients, unstable soils, high rainfall, and dense native bush all combine to make forestry road building a specialist discipline.
Unlike urban road construction where conditions are relatively predictable, forestry roads must be carved through landscapes that fight back. Slips, washouts, and erosion are constant threats, and the roads must be robust enough to handle fully loaded logging trucks weighing up to 46 tonnes.
Planning and Design
Every forestry road project begins with careful planning. We work with forest managers and engineers to design road alignments that balance:
- Grade requirements — keeping slopes manageable for heavy vehicles
- Cut and fill balance — minimising the amount of material that needs to be moved
- Drainage — the single most important factor in forestry road longevity
- Environmental protection — avoiding waterways, wetlands, and areas of ecological significance
- Harvest planning — ensuring the road network serves both current and future harvesting needs
Construction Methods
Our forestry road construction typically involves several phases:
1. Clearing and Formation
Vegetation is cleared along the road corridor and the formation is cut using excavators. On steep terrain, this requires experienced operators who can read the ground and adjust on the fly.
2. Drainage Installation
We install culverts, water tables, and cut-off drains before any surfacing. Proper drainage is non-negotiable — a forestry road without adequate drainage will fail within a single winter.
3. Subgrade Preparation
The road formation is compacted and shaped to shed water. In areas with poor subgrade material, we may need to import fill or use geotextile fabrics.
4. Surfacing
Aggregate is laid and compacted to create a durable running surface. The type and depth of aggregate depends on the expected traffic volumes and the underlying soil conditions.
Environmental Responsibility
Forestry road construction has environmental implications, and we take our responsibilities seriously. Parata holds ISO 14001 environmental management certification, and we implement strict sediment and erosion control measures on every project.
This includes:
- Silt fences and sediment traps near waterways
- Staged construction to minimise exposed earthworks
- Rapid revegetation of batters and exposed slopes
- Fish-friendly culvert installations
- Spill response plans for all machinery
Our Track Record
Parata has built hundreds of kilometres of forestry roads across the East Coast and Northland. We work with major forestry companies including PF Olsen, Ernslaw One, and others to deliver roads that perform year after year.
Our local knowledge is a genuine advantage — we understand the soils, the weather patterns, and the terrain in ways that only come from decades of working in these environments.
Get in Touch
If you have a forestry road project coming up, talk to us early. Good planning leads to better outcomes and lower costs over the life of the road.
Learn more about our forestry services or see our forestry road construction projects in action.
Contact our team to discuss your forestry road construction needs.
