TL;DR: A drone volumetric survey at Olympic Dam measures the tailings storage facility lifts, run-of-mine and product stockpiles, and the borefield and infrastructure corridors of BHP's copper-uranium-gold-silver complex near Roxby Downs, 560 kilometres north-west of Adelaide. Industrial Spatial Solutions flies CASA-certified RTK UAVs with photogrammetry and LiDAR payloads to deliver 1-3% volume accuracy on the open, satellite-friendly terrain of the Gawler Craton — without putting personnel onto unstable, radiation-controlled surfaces.
Key takeaways
- A drone volumetric survey Olympic Dam campaign captures an entire pad of ROM and product stockpiles in a single morning's flying, delivering volumes to within 1-3% — tighter than the 3-5% of a GPS walkover, because the UAV records every face uniformly rather than interpolating between walked points.
- Olympic Dam's tailings storage facility is the highest-value volumetric target on site: routine UAV lift, freeboard and capacity surveys feed both production accounting and the compliance reporting that a uranium-bearing licence demands, with no one walking the deposition surface.
- ISS flies the DJI Matrice 350 RTK with the Zenmuse P1 photogrammetry payload and the Zenmuse L2 LiDAR sensor, processing in Propeller, Pix4D and Trimble Business Center against ground control reduced to GDA2020 / MGA2020 or your site grid.
- All flights run under our CASA Part 101 Remote Operator's Certificate by RePL-licensed pilots, with the controlled-airspace footprint of the Olympic Dam aerodrome and the site radiation management plan built into every Job Safety Analysis.
- Indicative drone volumetric campaigns at Olympic Dam run from around AUD 3,000-9,000 per visit for stockpile and TSF work, with remote-site mobilisation from Adelaide (6-7 hours' drive or a FIFO flight) scoped separately and transparently.
Drone volumetric survey at Olympic Dam: why aerial measurement fits this site
Olympic Dam is the world's largest known single uranium deposit and the fourth-largest copper deposit, an iron-oxide-copper-gold (IOCG) ore body that BHP works as an integrated underground mine, concentrator, smelter and refinery on one lease near Roxby Downs. Production runs to roughly 200,000 tonnes of refined copper, around 3,500 tonnes of uranium oxide, plus gold and silver each year (BHP, 2024). Every one of those tonnes passes across surfaces that have to be measured — and many of those surfaces are precisely where you do not want a person standing.
That is the case for UAV volumetric surveying at Olympic Dam in one sentence. The tailings storage facility, the run-of-mine and product stockpiles, and the waste and overburden dumps are large, open and, in the case of tailings, genuinely hazardous to walk and partly radiation-controlled. A remotely piloted aircraft captures the whole surface from a safe stand-off in minutes, where a ground crew with a GPS rover could only record the points a person can safely reach — and the steep, loose, segregated faces, exactly where volume error concentrates, are the points they cannot reach.
The Gawler Craton terrain works in the drone's favour. Unlike the gully-shadowed escarpment sites of the eastern seaboard, the country around Olympic Dam is flat, open and almost ideal for GNSS and RTK: satellite visibility is excellent, ground control is easy to observe, and a flight plan rarely fights for line of sight. What the site takes away, it takes through remoteness, heat and the uranium licence — not through topography. That combination makes survey-grade aerial volumetrics one of the highest-value, lowest-risk survey disciplines on the lease.
Key point: "Drone volumetric survey" describes a workflow, not a guaranteed number. At Olympic Dam the figure on the report is only as good as the surveyed toe of the pile, the defined base surface, and the ground control behind the model. A drone with a poorly surveyed TSF base will produce a confident, precise, wrong volume — which is exactly the kind of error a uranium-bearing licence cannot carry.
Local applications: what we measure at Olympic Dam
Olympic Dam's flowsheet generates several distinct volumetric targets, each with its own cadence, accuracy expectation and compliance angle. ISS scopes the payload and control to suit each one rather than flying every job the same way.
| Target | What it is | Volumetric requirement |
|---|---|---|
| Tailings storage facility | Tailings deposition and periodic lifts | Lift and capacity volumes, freeboard, deposition rate, compliance reporting |
| ROM stockpiles | Run-of-mine ore ahead of the concentrator | Monthly inventory and reconciliation against plant throughput |
| Product stockpiles | Concentrate and copper product holding | Booked-inventory verification at month-end |
| Waste and overburden dumps | Surface waste and development mullock | Movement tracking and dump capacity monitoring |
| Borefield and corridors | Water borefield and infrastructure routes | Earthworks volumes, corridor mapping, as-built progress |
The TSF is the standout. On a uranium-producing operation the tailings facility is a regulated structure, and survey-based monitoring of its lifts, freeboard and embankment is part of satisfying the South Australian mines safety framework. A monthly or quarterly UAV survey gives that monitoring a stable, defensible baseline — capacity and remaining airspace, deposition rate against design, and a surface comparison against the prior lift — all without a person on the deposition beach.
The stockpile case is reconciliation. The concentrator's plant throughput is compared against surveyed mined and stockpiled volume; persistent gaps point to fragmentation problems, ore loss, dilution, or simply bad measurement. A repeatable monthly drone volumetric of the ROM and product pads turns that comparison from an argument into a number. On a continuous copper circuit feeding a smelter on the same lease, that number protects production accounting at every handover.
Beyond the mine, the same UAV capability supports the borefield and the town, power and water corridors that make Olympic Dam a self-contained industrial city — earthworks volumes for civil projects, corridor mapping for new tie-ins, and progress measurement against design for any expansion works. BHP has studied major smelter and refinery expansion of Olympic Dam for over a decade; any such project would generate sustained earthworks-volume and cut-and-fill demand on top of the recurring inventory cycle.
Method and equipment for a remote, controlled-airspace site
A drone volumetric survey is only as good as the sensor and the control behind it. At Olympic Dam, method selection is shaped by three site realities: the airspace around the aerodrome is controlled, the heat is extreme, and the nearest replacement instrument is hours away in Adelaide.
- DJI Matrice 350 RTK — our primary industrial airframe, IP55-sealed with around 55 minutes' endurance and onboard RTK that georeferences each capture to a few centimetres. One airframe carries either payload, so a single mobilisation covers most volumetric scopes.
- Zenmuse P1 photogrammetry payload (45 MP full-frame) — the cost-effective route to 1-3% volume accuracy on open, well-textured ROM and product stockpiles, producing a true-colour orthomosaic of the pad as a by-product.
- Zenmuse L2 LiDAR payload — used where the TSF surface is wet, dusty, low-contrast or partly vegetated on rehabilitated areas, because it measures range directly and returns bare-earth points where photogrammetry would smear the surface.
- Leica GNSS and total stations — for observing ground control points and independent check points, reduced to GDA2020 / MGA2020 or the Olympic Dam site grid. As a rule, control is held 2-3 times more accurate than the survey tolerance.
- Propeller Aero, Pix4Dmapper, Trimble Business Center and 12d Model — for surface reconstruction, classification and surface-to-surface volume computation, with check points used to report residuals rather than assert accuracy.
The workflow is the disciplined sequence we run across every resource site: scope and flight plan at 70-80% overlap and a ground sample distance of 1.5-3 cm/pixel; establish and observe ground control; fly the planned grid autonomously; capture the toe and base surface so the boundary between pile and pad is measured, not assumed; process to a dense surface model; and compute volume against the defined base before QA against withheld check points. The toe is where volume error lives, and on a TSF with a feathered or wet edge it must be surveyed explicitly — otherwise the footprint, and the volume, is a guess.
Two adaptations are specific to Olympic Dam. First, the controlled airspace of the Olympic Dam aerodrome is checked and coordinated before mobilisation, and exclusion zones are built into the flight plan under CASA conditions. Second, in 45-degree summer heat we verify instrument behaviour on site rather than trusting temperate-climate calibration intervals, and we carry redundant control gear because a same-day swap from Adelaide is not possible.
Key point: RTK reduces but does not eliminate ground control on a survey-grade volumetric. We always retain independent check points, because RTK can produce a precise model that is systematically shifted in the vertical — and on a regulated TSF volume, a vertical bias is the one error you cannot afford to publish.
Standards and compliance in South Australia
Aerial volumetric work at Olympic Dam sits under a heavier regulatory load than most Australian sites, because uranium is part of the product mix and the surveys feed regulated structures.
- CASA Part 101 / Civil Aviation Safety Regulations: All UAV operations are conducted under the ISS CASA Remote Operator's Certificate (ReOC) by pilots holding a Remote Pilot Licence (RePL), with the controlled airspace around the Olympic Dam aerodrome managed in the flight authorisation.
- Work Health and Safety (Mines) Regulations (SA): Mandate monitoring of structures where failure is a risk; UAV-based volumetric and surface monitoring of the tailings storage facility and waste dumps supports those obligations without placing personnel on unstable surfaces.
- SA Radiation Protection and Control Act 2021 and ARPANSA codes: Govern work in and around the radiation-controlled areas of the mine and TSF. ISS pilots complete the site's radiation safety inductions and operate to BHP's radiation management plan.
- Surveying Act 1992 (SA) and ICSM SP1 standards: Set the datum, accuracy and competency framework. Deliverables are referenced to GDA2020 / MGA2020 and, where the work feeds statutory mine survey records, provided in a form a registered mine surveyor can certify.
Indicative commercial ranges help operators budget. A drone volumetric campaign covering the TSF and the main stockpile pads commonly sits in the AUD 3,000-9,000 range per visit, with repeat-contract monthly monitoring rates 20-40% lower as setup amortises across the cycle. LiDAR capture carries a 20-40% premium over photogrammetry where the surface demands it. Remote-site mobilisation, travel and accommodation from Adelaide are scoped separately and transparently. Against a single corrected reconciliation error on a multi-million-dollar product stockpile, a full year of monthly volumetrics is rarely the cost question — the unmeasured tonnes are.
Key point: ISS drone volumetric deliverables comply with ICSM SP1 accuracy standards and are produced by pilots inducted to BHP's site, safety and radiation requirements, so the volumes drop into statutory, compliance and engineering processes without rework.
Why operators choose ISS for volumetrics at Olympic Dam
South Australia's resources sector is smaller than Western Australia's or Queensland's but is defined by high-value, technically demanding assets, and Olympic Dam is the most demanding of them all. A general drone operator can produce a point cloud; a survey firm produces a defensible volume. The difference matters most on a regulated TSF and a continuous copper circuit, where the number has to withstand audit, reconciliation and a uranium licence.
ISS observes and reduces its own ground control, retains independent check points, references everything to MGA2020 or your site grid, and reports accuracy and bulk density transparently — with density stated and sourced, because it is the largest single error in any volume-to-tonnes conversion. We arrive self-sufficient, radiation-inducted and certified, fly photogrammetry or LiDAR on its merits, and hand back data in the format your production-accounting and mine-planning teams already use. Crucially, the volumetric need not be a standalone visit: ISS also delivers mechanical, underground and 3D laser scanning surveys across Olympic Dam, so a drone volumetric campaign can be coordinated into a single mobilisation alongside shutdown and underground work — one trip up the Stuart Highway, not three.
Frequently asked questions
How accurate is a drone volumetric survey at Olympic Dam?
With surveyed ground control, independent check points and a clean, measured toe, ISS achieves 1-3% volume accuracy on the ROM, product and waste stockpiles, and on TSF lifts. The open Gawler Craton terrain gives excellent GNSS and RTK conditions, so control is reliable. Accuracy is reported against withheld check points in the deliverable, not assumed — which is what makes a regulated TSF volume defensible.
Can you fly the tailings storage facility safely given it is radiation-controlled?
Yes — that is precisely where UAV volumetrics earn their place. The aircraft captures the whole TSF surface from a safe stand-off with no one on the deposition beach. Our pilots complete the site's general, mine and radiation safety inductions and operate to BHP's radiation management plan within controlled areas, consistent with ARPANSA codes and the SA Radiation Protection and Control Act 2021.
How does the Olympic Dam aerodrome affect drone operations?
The aerodrome sits within the site footprint, so the surrounding airspace is managed in every flight authorisation. All work is conducted under our CASA Part 101 ReOC by RePL-licensed pilots, with exclusion zones, airspace coordination and the controlled-airspace footprint built into the Job Safety Analysis before mobilisation.
How quickly can ISS mobilise a drone crew to Olympic Dam?
For scheduled work, crews drive the 6-7 hours up the Stuart Highway from Adelaide with a fully equipped vehicle, or fly into the Olympic Dam aerodrome for FIFO rotations and integrate with your roster and inductions. A pad of stockpiles and the TSF can typically be flown in a single morning, with QA'd volume reporting back within 24-48 hours. For ongoing inventory and compliance monitoring we offer service agreements with priority scheduling and consistent crews.
Request a quote
If you operate or contract at Olympic Dam and need stockpiles, tailings or earthworks measured quickly, safely and to a number you can defend, talk to a surveyor who understands both UAV volumetrics and remote, radiation-controlled South Australian work.
- Call 0407 057 015 — Discuss your TSF, stockpile or earthworks scope with a surveyor who knows Olympic Dam and the Gawler Craton.
- Receive a detailed proposal — Payload choice, control plan, accuracy specification, safety and radiation plan, and a fixed-price quotation tailored to your cadence or project.
- Mobilise to site — We coordinate aerodrome airspace, access, inductions, travel and accommodation to fit your timeline.
For ongoing volumetric monitoring across Olympic Dam, and for combined scopes alongside mechanical, underground and laser scanning work, ask about an annual service agreement with priority scheduling and dedicated crews. Contact ISS to get started.
Industrial Spatial Solutions — every cubic metre measured, every tonne defensible.
Related reading: Surveyors Olympic Dam, drone volumetric surveys, UAV aerial surveys overview.