Who this is for
Civil designers, survey managers, land development consultants and project engineers preparing local government or local authority asset data submissions for WA civil, land development and infrastructure projects.
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As-Built and Authority Documentation
A-Spec, D-Spec, R-Spec and O-Spec Survey Deliverables Explained
Local government asset submissions require more than coordinates. Noble Surveys helps WA project teams understand what A-Spec, D-Spec, R-Spec and O-Spec require, how to capture the right asset data and how to package deliverables that reduce avoidable review comments and rework.
Where Water Corporation water or sewer assets are included, DS-80 should be planned as a separate deliverable alongside local government requirements.
What problem it solves
A-Spec, D-Spec, R-Spec and O-Spec deliverables each have specific asset data, attribute, geometry and QA expectations. Misunderstanding them can cause rejected submissions, clarification requests and rework. This guide explains how to align the survey capture and data structure before field work begins.
When it matters
Confirm these requirements during design development, before putting survey packages to market, when coordinating as-constructed pickups and before preparing local government submission datasets. Where Water Corporation assets are involved, plan DS-80 deliverables separately.
What Noble Surveys delivers
Noble Surveys can provide survey control checks, pickup methodologies tailored to the relevant specification, asset attribute population, geometry validation, QA checks, digital files and submission-ready datasets with clear documentation.
Specification alignment checklist
Use these steps to keep every submission tight.
Adjust for each authority but keep the structure.
Understand specification intent
- A-Spec focuses on asset and attribute standards for drainage, roads and open space
- D-Spec covers drainage networks and pit structures with strict chainage rules
- R-Spec applies to road corridors, pavements and associated furniture
- O-Spec controls open space, landscaping and irrigation deliverables
- Identify separate Water Corporation DS-80 requirements early where water or sewer assets are included in the project.
Plan the survey pickup
- Confirm the tolerance requirements nominated by the relevant authority or project specification
- Reference design models and IFC drawings so pickups match authorised geometry
- Schedule pickups immediately after install to avoid buried evidence
- Capture attribute photos and notes while crews are onsite
Build submission-ready data
- Populate attributes exactly as per schema (codes, casing and units matter)
- Validate geometry, topology and snapping rules before export
- Export in the requested formats (typically DWG, LandXML, shapefile and PDF)
- Keep any DS-80 deliverables separate and cross-check coordinates, asset identifiers and dates so project records do not conflict.
Close out with authorities
- Provide QA statements outlining control, capture methods and processing
- Respond quickly to authority clarifications with traceable revisions
- Archive the same datasets internally for future operations or disputes
Common questions
Do all councils require every A-Spec family?
No. Each authority outlines the families they adopt. We confirm the exact requirements before mobilising to avoid capturing unnecessary data.
Is DS-80 part of A-Spec, D-Spec, R-Spec or O-Spec?
No. DS-80 is a Water Corporation requirement for applicable water and sewer assets. A-Spec, D-Spec, R-Spec and O-Spec are generally used for local government or local authority asset data. On projects with both local government and Water Corporation assets, the deliverables should be planned separately so the datasets remain consistent.
Who confirms which specification applies?
The relevant local government, asset owner, project specification or approval condition should confirm which specification applies. The safest approach is to confirm the required deliverables before survey pickup begins, rather than trying to retrofit attributes after construction.
What tolerances should we design for?
Tolerance requirements vary by authority, asset type and project specification. Confirm the nominated tolerances with the relevant authority and brief the site crew before pickup.
Can Noble Surveys prepare the final submission?
Yes. We collate the geometry, populate attributes, run QA checks and submit directly to the authority or provide a packaged deliverable for your internal coordinator.
Related resources
Need local government asset submissions prepared correctly?
Send through your authority requirements, design drawings, asset schedules and submission deadlines. Noble Surveys can plan the survey capture, populate the required asset data and prepare deliverables for local government review.