Underground utility locating insights

Why utility locating matters before infrastructure design

Fri, 31 Jul 2026 01:22:16 GMT

Infrastructure design decisions are often made long before excavation begins, but those decisions still depend on what is already beneath the site. Existing power, water, gas, communications, drainage, and other underground assets can influence alignments, levels, access points, construction methods, and project staging.

Utility locating during the design stage helps engineers, consultants, councils, and project teams develop plans around real site conditions rather than relying only on available records. This guide explains what pre-design locating involves, why it matters, and how to prepare for a useful site investigation.

What is infrastructure design locating?

Infrastructure design locating is the process of identifying and documenting underground services before detailed design work is finalised. It can support road upgrades, drainage projects, subdivisions, utility renewals, public infrastructure, and other civil works where existing services may affect the proposed design.

The work may involve reviewing available service information, locating assets in the field, marking their position on the ground, and collecting site data that can be incorporated into project plans. The required level of detail depends on the project, the design stage, and the risks associated with the proposed works.

WA Mapping provides infrastructure design locating for councils, shires, utility providers, civil design consultants, and project teams across Western Australia.

Why plans and records may not be enough

Existing plans are an important starting point, but they may not always show the exact position, depth, alignment, or current status of every underground service. Site changes, older installations, undocumented works, and differences between design drawings and completed construction can all affect the reliability of available information.

Field investigation helps the design team compare records with actual site conditions. This can identify potential conflicts early enough for the project team to consider design changes, additional investigation, or alternative construction methods before work reaches site.

For broader site investigations, underground utility and service locating can help establish the location of buried infrastructure across the proposed work area.

How GPR supports pre-design investigations

Ground penetrating radar can be used to investigate subsurface features where conditions are suitable. It may help identify service alignments, changes in materials, voids, or other features that are not visible from the surface.

GPR is often most useful when it forms part of a broader locating approach. Site access, ground conditions, surface materials, service type, and the information available before the investigation can all influence the method used.

Learn more about ground penetrating radar scanning and how it can support underground service investigations.

When should locating happen in the design process?

Locating is generally most useful when it occurs early enough for the findings to influence the design. If investigation is left until construction planning or mobilisation, the project team may have fewer practical options for responding to conflicts.

Early locating can support concept design, route selection, preliminary layouts, detailed design, and constructability reviews. Additional locating may still be required later if the project scope changes, the work area expands, or more detailed verification is needed.

For projects that also require field data capture, set-out support, or coordinated survey information, subcontracted surveying services can be integrated with the locating work.

Information to provide before the site visit

A clear project brief helps the locating team focus on the areas that matter most to the design. Useful information may include:

the proposed work area and design corridor
current drawings, plans, or service records
the intended construction or infrastructure works
known access restrictions or site hazards
the required deliverables and preferred data format
the project program and design milestones

It is also helpful to explain which assets or design conflicts are the highest priority. This allows the investigation to be planned around the decisions the project team needs to make.

What should the design team do with the findings?

Locating information should be reviewed alongside the project drawings, available records, survey data, and design assumptions. The findings may help the team adjust alignments, identify areas requiring further verification, plan protection measures, or refine the construction methodology.

Utility locating does not replace project-specific engineering, survey, or excavation controls. It provides practical site information that can strengthen those processes and help the project team make better-informed decisions.

Plan around underground services earlier

Pre-design locating gives infrastructure teams more time to understand underground constraints and respond before construction begins. The earlier accurate site information is available, the easier it is to incorporate it into design development and project planning.

Explore WA Mapping's infrastructure design locating services for civil and public infrastructure projects across Western Australia.

To discuss the proposed work area, available plans, and required deliverables, contact our team and provide the key project details.

When subcontracted surveying support benefits civil projects

Fri, 31 Jul 2026 01:20:45 GMT

Civil projects often need accurate field information at specific stages, but not every contractor, consultant, or project team requires a permanent in-house surveying resource. Subcontracted surveying support can provide additional field capacity when workloads increase, specialist equipment is needed, or a project requires coordinated data capture alongside underground service locating.

The right arrangement can help project teams maintain progress, improve communication between field and design personnel, and obtain the site information needed for planning and delivery. This article explains when subcontracted surveying support may be useful and what to consider before engaging a field team.

What is subcontracted surveying support?

Subcontracted surveying support involves engaging an external field team to complete defined surveying or data capture tasks as part of a broader project. The work is usually delivered under an agreed scope, with the subcontractor supporting the project’s existing surveyors, engineers, designers, or construction personnel.

Depending on the project, the work may include site data capture, GPS observations, feature pickups, utility-related field information, or coordinated surveying assistance. The required deliverables should be agreed before mobilisation so the collected information can be used by the project team.

WA Mapping provides subcontracted surveying services for civil, infrastructure, mining, and utility-related projects across Western Australia.

When additional surveying capacity can help

Project teams may require additional field support when:

internal survey resources are committed to other projects
the project program requires several work areas to be covered
field data is needed within a limited construction window
remote or regional work requires a mobile subcontractor
utility locating and survey information need to be coordinated
the scope is too limited to justify a permanent resource
design teams need current site information before progressing

Subcontracting can be particularly useful when the requirement is clearly defined and the project team needs reliable support without expanding its permanent workforce.

Supporting civil design and construction teams

Civil designers and construction teams rely on consistent site information. When field data is delayed or incomplete, decisions may be based on assumptions that later require revision.

Surveying support can help capture relevant site features, align field findings with design requirements, and provide information for project coordination. It is most effective when the field team understands why the data is required and how it will be used.

For projects where buried infrastructure may influence the proposed works, infrastructure design locating can be completed alongside surveying support.

Combining surveying with underground service locating

Underground service locating identifies buried assets and other subsurface features, while surveying can help capture and organise relevant field positions. Coordinating the two activities can reduce repeated site visits and help the project team receive more consistent information.

This approach may be useful for road upgrades, drainage works, utility projects, subdivisions, and other civil developments where existing underground services must be considered during design or construction.

WA Mapping's underground utility and service locating can support field investigations where buried infrastructure forms part of the project scope.

How GPR findings can be incorporated into field data

Ground penetrating radar may be used to investigate subsurface features where site conditions are suitable. When relevant findings are marked or captured in a coordinated way, they can be reviewed alongside other survey and design information.

The usefulness of GPR depends on ground conditions, target materials, surface access, depth, and the wider locating method. It should not be treated as a standalone answer for every site.

Learn more about ground penetrating radar scanning and its role in underground service investigations.

What to include in the subcontract scope

A clear scope helps prevent gaps, duplicated effort, and misunderstandings about deliverables. Before engaging a subcontracted surveying team, confirm:

the work area and project boundaries
the features or assets to be captured
the required coordinate system or project controls
the expected accuracy and level of detail
the required files, plans, or data format
site access, induction, and safety requirements
who will review and approve the field information
the program, hold points, and delivery dates

The project team should also provide relevant drawings, background information, and contact details for the people responsible for field coordination.

Why communication matters between field and design teams

Accurate fieldwork is only valuable when the project team understands what was captured, how it was collected, and whether any limitations were identified. Clear communication helps designers and engineers interpret the information correctly and decide whether further investigation is required.

Field personnel should be able to raise access issues, unexpected site conditions, or areas that fall outside the agreed scope. These details can affect the reliability and completeness of the final deliverables.

For active construction projects, civil construction locating can also help project teams assess underground constraints before excavation or roadworks begin.

Benefits of using an experienced subcontract field team

An experienced subcontract team can integrate more easily with existing project systems and site requirements. Practical benefits may include:

additional capacity during peak workloads
reduced delays while waiting for field resources
coordinated locating and surveying support
clearer communication with engineers and contractors
access to relevant field equipment
support for metropolitan and regional projects

The value comes from matching the field capability to the project requirement rather than adding resources without a clearly defined purpose.

Plan the fieldwork around the required decision

Before work begins, identify the decision the field information needs to support. The project may need data for concept design, detailed design, construction planning, verification, or future asset records. Each purpose may require a different scope and level of detail.

Starting with the intended outcome makes it easier to determine the work area, field methods, deliverables, and internal review process.

Add flexible field support to your project

Subcontracted surveying support can strengthen project delivery when teams need additional capacity, coordinated utility information, or current site data. A well-defined scope and clear communication help ensure the fieldwork provides practical value.

Explore WA Mapping's subcontracted surveying services for civil, infrastructure, mining, and utility projects across Western Australia.

To discuss the work area, project controls, and required deliverables, contact our team with the key project information.

How underground service locating supports mining projects

Fri, 31 Jul 2026 01:18:12 GMT

Mining projects depend on reliable information about what lies beneath active work areas, haul roads, processing facilities, camps, and supporting infrastructure. Buried power, communications, water, fuel, drainage, and other services can affect excavation planning, maintenance work, shutdown activities, and future development.

Underground service locating helps mining teams understand existing site conditions before ground disturbance begins. It can reduce uncertainty, support safer planning, and give engineers, supervisors, and contractors better information when coordinating work across complex sites.

Why mining sites require careful underground service locating

Mine sites often contain a combination of permanent infrastructure, temporary services, legacy installations, and equipment added over different stages of operation. Records may be available, but they may not always reflect every site change or the exact position of buried assets.

Underground service locating allows field conditions to be compared with existing drawings and site knowledge. This can help identify potential conflicts before excavation, trenching, drilling, roadworks, or construction begins.

WA Mapping provides mining service locating for operational sites, project teams, contractors, and infrastructure works across Western Australia.

Common mining areas where locating may be required

Locating work may be needed across many parts of a mining operation, including:

haul roads and access tracks
processing and workshop areas
camp and accommodation infrastructure
power, water, and communications corridors
planned excavation or trenching zones
new building and facility footprints
shutdown and maintenance work areas
civil upgrades and drainage projects

The scope should be tailored to the proposed work and the risks associated with each area. A focused investigation helps ensure the right sections of the site are assessed before work proceeds.

How ground penetrating radar can assist

Ground penetrating radar can support subsurface investigation where ground and surface conditions are suitable. It may help identify buried services, changes in materials, voids, or other features that are not visible from the surface.

GPR should be selected and interpreted within the context of the site. Soil conditions, rock content, surface access, service materials, and the depth of potential targets can all influence results.

For suitable sites, ground penetrating radar scanning can form part of a broader underground locating approach.

Why existing drawings should be supported by field investigation

Site plans, as-built drawings, and asset records remain important sources of information, but mining environments can change frequently. Temporary services may be installed, relocated, or removed, while older records may not capture every modification.

Field locating provides current site information that can be reviewed alongside available records. This helps project teams identify discrepancies, clarify uncertain areas, and decide whether further verification is required.

For broader site investigations, underground utility and service locating can support projects outside dedicated mining work areas as well.

Locating before excavation and civil works

Ground disturbance is often one of the highest-risk stages of mining and civil work. Excavation, trenching, grading, and road construction can all interact with buried assets if their position is not clearly understood.

Locating before work begins can help teams plan excavation zones, adjust alignments, stage activities, and identify areas that need more detailed verification. This information should be incorporated into the site’s existing excavation permits, engineering controls, and safety procedures.

Where civil work is the primary focus, WA Mapping also provides civil construction locating for roadworks, drainage, subdivisions, and associated infrastructure projects.

Supporting project design and future mine development

Underground service locating is not limited to immediate excavation work. It can also support planned expansions, new facilities, route design, utility upgrades, and mine infrastructure development.

Identifying underground constraints early gives designers and engineers more opportunity to account for existing services before plans are finalised. This can reduce redesign, avoid unnecessary delays, and improve coordination between field and design teams.

For early project planning, infrastructure design locating can help establish the site information required for design development.

Information to provide before a mining site visit

A clear brief allows the locating work to be planned around the mine’s operational and project requirements. Useful information may include:

the exact work area and proposed ground disturbance
available service drawings or asset records
site induction, escort, and access requirements
known hazards and operational restrictions
required deliverables and reporting format
the project program and relevant shutdown dates

Where possible, project and site representatives should identify the services or conflicts of greatest concern. This helps the locating team prioritise the areas that matter most.

Use locating information as part of the site control process

Underground service locating supports decision-making, but it does not replace the mine’s engineering, permit, survey, or excavation control procedures. Findings should be reviewed with existing site documentation and incorporated into the project’s formal risk management processes.

When locating information is gathered early and communicated clearly, it can strengthen planning across maintenance, construction, shutdown, and expansion activities.

Plan mining work with better site information

Mining service locating helps teams identify buried infrastructure before work reaches the ground disturbance stage. It provides practical field information that can support safer planning and more effective project coordination.

Explore WA Mapping's mining service locating services for projects across Western Australia.

To discuss site access, proposed works, and the required deliverables, contact our team with the key project details.