Soil erosion investigations, Narromine and Gilgandra – November 2024 to March 2025
Our crews will return to site on 20 January 2025 to undertake soil erosion investigations at multiple locations around Narromine and Gilgandra. Known as Erosion Threshold Velocity testing, these investigations test soil erodibility in flood-prone areas.

Work being done
Work will include:
- Superficial soil sampling and testing on site using hand tools
- Undisturbed soil sample collection involving pushing sampling frames with a small excavator through a small trench to collect samples with an ‘undisturbed’ surface for testing in a laboratory.
What can I expect?
- Site supervision vehicles, a small excavator and accompanying flatbed truck/trailer operating onsite or accessing work sites
- Nearby residents may experience some daytime noise
- At locations where sample collection will disturb the ground surface, areas will be backfilled at the completion of work (same day).
Machinery used
Small excavation equipment (5-tonne excavator or smaller), had tools, support vehicles, traffic management equipment and signage.
How we're managing impacts
- Traffic management will be in place to ensure safe access for all road users if works are required in the road corridor.
- Reduced road speeds in the vicinity of work areas if required
- Regular contact with impacted landowners to discuss site activity and any land access requirements.
Contact
For any concerns or enquiries please phone 1800 732 761 or email inlandrailnsw@inlandrail.com.au
Thank you for your patience and cooperation while we carry out these works.

What is Erosion Threshold Velocity testing?
Erosion Threshold Velocity testing is a study of soils, to determine whether they could possibly be eroded by overland water flows. This fact sheet explains how and why Inland Rail uses this form of testing and includes a step-by-step explanation of the testing process.