Survey and Data Management

UIA provides professional utility survey services across Melbourne, Geelong, Ballarat, Bendigo, and regional Victoria, delivering accurate, survey‑grade mapping of underground assets to support safe, compliant, and efficient construction. Our utility surveys combine advanced detection technology with high‑precision spatial surveying to produce design‑ready, AS5488‑aligned utility maps that reduce risk and eliminate uncertainty during planning and excavation.

Utility surveys are essential for documenting subsurface infrastructure and ensuring construction teams understand the exact location, depth, and classification of underground utilities. This supports safer excavation, prevents costly service strikes, and ensures compliance with Victorian regulations and industry standards. 

A utility survey is the structured process of locating, recording, and mapping underground utilities using a combination of electromagnetic locating, ground penetrating radar (GPR), non‑destructive excavation, and geospatial surveying. The final output is a detailed, geo‑referenced map showing the position and quality level of all detected assets, classified in accordance with AS5488 Subsurface Utility Information (SUI). 

Utility surveys provide critical information for engineers, designers, and contractors, enabling informed decisions and reducing the risk of clashes during construction.

We deliver a complete, end‑to‑end utility survey service that integrates detection, verification, and spatial mapping into a single, cohesive workflow.

Using EMF locating and GPR, we identify both metallic and non‑metallic utilities including:

• Electrical and communications
• Water and gas
• Sewer and stormwater
• Irrigation and private services
• Unknown or abandoned assets

This multi‑sensor approach ensures comprehensive subsurface coverage. 

Where required, we expose utilities using vacuum excavation to confirm depth, alignment, and material, achieving Quality Level A accuracy. This is the highest confidence level under AS5488. 

Our surveyors capture precise horizontal and vertical coordinates using total station or RTK GPS, ensuring all utilities are accurately positioned to MGA/AHD datums. 

All field data is processed into professional, design‑ready deliverables including:

• CAD drawings
• GIS datasets
• PDF utility plans
• 3D spatial models
• AS5488‑classified SUI reports

These outputs integrate seamlessly into engineering, BIM, and construction workflows. 

A professional utility survey provides:

• Improved safety by preventing utility strikes
• Compliance with Victorian regulations and AS5488
• Reduced delays caused by unknown underground conditions
• Accurate design data for engineering and planning
• Lower project costs through risk mitigation

In Melbourne, utility mapping is considered a critical step before excavation and is often required for construction approvals.