As Constructed Survey Gold Coast
- Records installed assets as built
- ADAC data where the recipient requires it
- Requirements confirmed per asset owner
- Measured record, not engineering certification
Recording what was built, for whoever takes it over
An as-constructed survey measures infrastructure after it has been installed, so the asset owner has a record of what is actually in the ground. On a Gold Coast development that might include stormwater pipes and pits, water and sewer mains, kerbs, roads and other assets that will be handed over to an authority or another owner.
It is the reverse of a construction set-out, which puts design positions on the ground before work starts. An as-constructed survey records the finished positions and levels, which may differ from the design. Before the survey is scoped, confirm the data format the receiving authority requires, so you can check that it can be supplied and agree it in the quote.
ADAC and other data requirements
ADAC, short for Asset Design and As Constructed, is a digital format many Queensland authorities use to receive information about new assets. Whether ADAC applies, and which version and attributes are needed, depends on who is receiving the asset and what type of asset it is.
On the Gold Coast, water and sewer assets sit under South East Queensland asset information requirements, which are updated from time to time. Other City assets can have their own attribute requirements, and some asset types are not delivered in ADAC at all. Rather than assuming a format, confirm the current specification with the receiving authority or the project's consulting engineer before the survey begins.
Earlier in the job, a construction set-out survey marks the design positions for the works that are later recorded as built.
Information to gather first
As-constructed work goes more smoothly when these are settled before anyone is on site.
- Asset owner and approval
- Who will take over each asset, and the approval or development reference it relates to.
- Design plans
- The approved engineering drawings and any changes made during construction.
- Data specification
- The receiving authority's required format, version and attribute list for each asset type.
- Stage and extent
- Which stage or area is complete and ready to record, and what is still under construction.
For building work rather than civil assets, a certifier may instead ask for a Form 12 survey covering a specific surveyed aspect.
Before the trench is backfilled
Some features are easiest to record while they are still visible, such as pipe inverts, junctions and fittings. Talk with the surveyor early about which items need to be picked up during construction and which can be measured at the end. Leaving everything until completion can mean returning to expose work or relying on less direct information.
If you are unsure what earlier works left under the site, underground service locating is a separate task that looks for existing services rather than recording new ones.
Where existing services may conflict with new works, underground service locating can be scoped to look for them before construction.
What the survey does and does not cover
The survey provides measured positions, levels and attributes for the agreed assets, prepared in the agreed format. It does not certify that the works meet the design, replace the consulting engineer's certification, or guarantee acceptance by the authority. Those steps rest with the engineer, the contractor and the receiving authority.
If an authority returns comments, the data may need correction or further information. Ask how revisions are handled when the job is quoted.
Request an as constructed survey quote
Send the approved engineering plans, the asset types, the receiving authority's data requirements and the stage that is ready. The quote can then reflect the assets to record, the format needed and any visits during construction.
Is ADAC always required?
No. It depends on the receiving authority and the asset type. Confirm the requirement for each asset before the survey is scoped.
Which ADAC version will be used?
The version the receiving authority currently requires for your project. Requirements change over time, so check the current specification rather than relying on what an older project used.
Can as-constructed data be captured after everything is finished?
Some can, but buried features are often easier to record during construction. Plan the capture points with the surveyor early.
Does the survey mean the works are approved?
No. It records what was built. Engineering certification and authority acceptance are separate steps.