Volumetric Uav — Rosebery

TL;DR: A drone volumetric survey at Rosebery measures ore and concentrate stockpiles, tailings storage facilities and waste-rock dumps from the air, calculating enclosed volume to within 1-3% without putting personnel onto loose, rain-soaked slopes. Industrial Spatial Solutions flies CASA-certified RTK UAVs into MMG's remote West Coast operation on a scoped, single-mobilisation basis — capturing every pile and surface in one weather window and reporting to your datum within 24-48 hours of demobilisation.

Key takeaways

• A drone volumetric survey Rosebery captures the full surface of a stockpile or TSF uniformly, achieving 1-3% volume accuracy against a surveyed base surface — tighter than the 3-5% of a GPS walkover, and without anyone climbing wet, segregated faces above the concentrator.
• Rosebery's relevant volumes are concentrate and ROM stockpiles feeding the on-site concentrator, plus the Bobadil and South tailings storage facilities, where freeboard and capacity must be quantified accurately under Tasmania's mines safety framework.
• The West Coast's 2,000 mm-plus annual rainfall and persistent low cloud make weather windows the binding constraint, so ISS scopes the whole flight plan before crossing Bass Strait and captures all targets in a single mobilisation.
• ISS flies the DJI Matrice 350 RTK with the Zenmuse P1 (photogrammetry) or Zenmuse L2 (LiDAR for vegetated, dusty or low-light ground), tying every survey to GDA2020/MGA2020 with independent check points under CASA CASR Part 101.
• Indicative cost for a scoped Rosebery drone volumetric mobilisation runs from around AUD 4,000-8,000 for a focused stockpile or TSF task inclusive of the Bass Strait crossing, with recurring-programme rates lower per visit.

Table of contents

• Drone volumetric surveying at Rosebery
• What gets measured at Rosebery
• Why drone volumetrics suit this site
• Method, equipment and accuracy
• Standards and compliance in Tasmania
• Why ISS for volumetrics on the West Coast
• Frequently asked questions
• Request a quote

Drone volumetric surveying at Rosebery

Rosebery is a single-operator mining town on Tasmania's West Coast, built around MMG's underground zinc-lead-copper-gold-silver mine — one of the longest-running underground operations in Australia, in continuous production since 1936. The orebody is a volcanogenic massive sulphide deposit hosted in the Mount Read Volcanics, mined through decline and shaft access and fed to an on-site concentrator that produces separate zinc, lead and copper concentrates. That concentrate is trucked north to the Port of Burnie for export. Wherever ore, concentrate, waste rock or tailings sits in bulk on the surface here, somebody needs to know how much there is — and that is exactly what a drone volumetric survey delivers.

A drone volumetric survey uses a remotely piloted aircraft to record the three-dimensional surface of a pile or excavation, either as overlapping high-resolution photographs (photogrammetry) or as a direct laser point cloud (LiDAR). That surface is processed into a digital surface model, and the volume is the space enclosed between the model and a defined base surface, reported in cubic metres and — where bulk density is known — tonnes. At a remote, single-concentrator operation like Rosebery, where every tonne of concentrate carries serious export value and inventory has to reconcile against plant throughput, getting that number right is not a nicety.

The reason a drone volumetric survey Rosebery makes sense over a ground walkover comes down to coverage and safety. A surveyor with a GPS rover can only record points where a person can safely stand; the steep, loose, segregated faces of a stockpile — precisely where volume error concentrates — are hazardous to climb, especially after rain. A UAV captures every face uniformly in minutes, from a safe stand-off, with no plant interaction and no one on the pile.

Key point: "Drone volumetric survey" describes a workflow, not a guaranteed number. At Rosebery the accuracy comes from the ground control, the base-surface definition and clean handling of each pile's toe — a confident, precise volume built on a guessed toe plane is still wrong.

What gets measured at Rosebery

The volumes that matter at Rosebery cluster around the concentrator feed, the export chain and the site's tailings and waste landform. Each has its own measurement purpose and reporting cadence.

Key volumetric targets around Rosebery

Stockpile reconciliation is the workhorse application: mines compare surveyed mined volume against what the concentrator actually processes, and persistent gaps point to blast fragmentation, ore loss, dilution or simply bad measurement. A repeatable drone volumetric gives that comparison a stable, defensible baseline — far better than a number interpolated between a handful of walked points.

The tailings storage facilities are the higher-stakes target. The Bobadil and South TSFs need accurate surface mapping for remaining-capacity calculations and freeboard verification, both of which feed directly into dam-safety and compliance obligations. A UAV maps the whole impoundment surface and the embankment crests in a single flight, producing a surface model that can be differenced against the previous epoch to show settlement, deposition and capacity used — without sending personnel walking embankments in the rain. The wider West Coast adds further demand: Renison's tin operation near Zeehan and Grange Resources' Savage River magnetite mine and Port Latta pelletising plant all generate pit-progress and stockpile volumetric work on the same drive-in mobilisation logic.

Why drone volumetrics suit this site

Rosebery's environment is the argument for flying rather than walking. The West Coast is one of the wettest parts of Australia — Rosebery and nearby Tullah receive well over 2,000 mm of rain a year, with frequent low cloud draped across Mount Black and Mount Read. Steep, saturated ground makes stockpile faces genuinely dangerous to climb, and that is exactly where a walkover loses accuracy. A UAV removes the person from the slope entirely, capturing the full surface from a safe stand-off in the minutes between weather windows.

The flip side is that the same weather is the chief constraint on the method. Photogrammetry needs reasonable light and dry surfaces; rain and gusts degrade data and ground a flight on safety grounds. ISS plans around this in two ways. First, by scoping the entire volumetric programme — every stockpile, TSF surface and waste area — into one flight plan so a single open window can clear the whole site rather than half of it. Second, by selecting LiDAR over photogrammetry where overcast skies, dust or vegetation would smear an image-based surface, because the Zenmuse L2 measures range directly and returns bare-earth points through light cover and poor light.

Then there is the cost of getting volume wrong at a remote single-concentrator operation. A measurement error scales directly with the value of the material: a few per cent on a concentrate stockpile bound for Burnie is a real misstatement in an export inventory position, and a capacity error on a TSF is a compliance and safety exposure, not just an accounting one. Because Rosebery sits hours from anywhere by road with Bass Strait between the site and most mainland suppliers, the practical premium on getting the right data in one trip is high — a re-fly is not a same-week proposition here.

Key point: At Rosebery the binding constraint is completeness within a weather window, not raw instrument accuracy. ISS scopes the whole flight programme up front so one mobilisation and one good window capture every pile, TSF and waste surface — there is no cheap second crossing.

Method, equipment and accuracy

ISS selects the payload to suit Rosebery's wet, steep, often low-light conditions rather than forcing one tool onto every flight. Every survey is flown under our CASA Remote Operator's Certificate (ReOC) by a licensed remote pilot (RePL), with a Job Safety Analysis and site induction completed before launch.

The primary platform is the DJI Matrice 350 RTK — IP55 weather-sealed, around 55 minutes endurance, with onboard RTK that georeferences each capture to a few centimetres. On open, well-textured stockpiles in workable light, the Zenmuse P1 (45 MP full-frame) photogrammetry payload is the most cost-effective route to 1-3% volume accuracy and produces a true-colour orthomosaic as a by-product. Where surfaces are vegetated, dusty, dark or low-contrast — rehabilitation areas, scrubby waste dumps, overcast TSFs — the Zenmuse L2 LiDAR payload measures range directly and penetrates light vegetation to return bare-earth points where photogrammetry would struggle.

Control is what makes the number defensible. Ground control points and independent check points are observed with Leica GNSS or total station and reduced to MGA2020 or site grid; for RTK/PPK flights, control is reduced but check points are always retained to verify the model, not just constrain it. The most error-prone part of any volume is the toe — the boundary between pile and pad — so where a surveyed toe plane is required, ISS observes the ground beneath and around each pile rather than assuming it. Processing runs in Pix4D, Propeller or Trimble Business Center, with volumes finalised against the agreed base surface and residuals reported from withheld check points.

As an indicative guide only, a scoped Rosebery drone volumetric mobilisation typically runs from around AUD 4,000-8,000 for a focused stockpile or TSF task — inclusive of travel and the Bass Strait crossing for equipment — rising for multi-target programmes that combine ore and concentrate stockpiles, both TSFs and waste landform in one visit. Recurring monthly or quarterly programmes carry lower per-visit rates because the setup and travel are amortised. Every job is quoted against a defined scope, accuracy specification and deliverable schedule rather than a day rate alone.

Standards and compliance in Tasmania

Mining at Rosebery operates under Tasmania's Mineral Resources Development Act 1995, administered by Mineral Resources Tasmania, together with the Work Health and Safety Act 2012 (Tas) and the associated mines safety framework regulated by WorkSafe Tasmania. Volumetric survey supports compliance directly — tailings and rehabilitation works must be accurately quantified, and ground-stability risks monitored where there is a credible risk of failure.

• CASA CASR Part 101: all ISS UAV operations are conducted under the relevant remote-pilot licence (RePL) and operator certificate (ReOC), with airspace, exclusion zones and site conditions cleared before each flight.
• ICSM SP1 and GDA2020/MGA2020: survey deliverables are referenced to the correct national datum and reduced consistent with the ICSM Standards for the Australian Survey Control Network, so volumes drop straight into your site grid.
• Work Health and Safety (Mines) framework: TSF freeboard and embankment monitoring by repeat volumetric survey supports the obligation to monitor structures and ground conditions where failure is a credible risk.
• Statutory mine survey records: where a volumetric feeds the statutory record, results are provided in a form a registered mine surveyor can certify.
• Bulk density transparency: every volume-to-tonnes conversion states the density applied and its source — the single largest error term in reported tonnage.

Key point: ISS volumetric deliverables are produced to ICSM and Tasmanian survey standards, referenced to the correct datum and verified against independent check points, so they are accepted into your reconciliation, dam-safety and compliance workflows without rework.

Why ISS for volumetrics on the West Coast

A general drone operator can produce a point cloud; a survey firm produces a volume you can defend in an audit, a reconciliation or a dam-safety review. ISS observes and reduces its own ground control, retains independent check points, references everything to MGA2020, and reports accuracy and bulk density transparently — that combination is what separates a survey-grade drone volumetric survey from aerial imagery with a volume tool bolted on.

For Rosebery specifically, the difference is the mobilisation model. ISS services the West Coast on a scoped, single-mobilisation basis built around the realities of isolation and the Bass Strait crossing — roughly 300 km from Hobart, around 130 km of winding road south of Burnie, with equipment travelling by sea freight or vehicle ferry. We define the complete flight programme before travelling, coordinate against ferry schedules, your shutdown or reporting calendar, site induction lead times and the weather, and capture every target in one efficient visit. Surveyors hold current generic and site-specific mine inductions for Rosebery's surface and processing operations, and deliverables are issued in AutoCAD, Civil 3D, Surpac, Deswik or 12d Model with point clouds and reports turned around quickly after demobilisation.

For operators running recurring inventory or TSF programmes, ISS offers service agreements that bundle multiple Rosebery volumetric tasks into planned visits — sharing the travel cost across the scope and giving you a survey partner who already knows the site, the access and the weather. The volumetric becomes one coordinated part of your survey programme rather than a standalone trip across the strait.

Frequently asked questions

How accurate is a drone volumetric survey at Rosebery?

With surveyed ground control, independent check points and a clean toe, ISS achieves 1-3% volume accuracy on typical Rosebery stockpiles — better than the 3-5% of a GPS walkover, because the UAV captures the whole surface uniformly instead of interpolating between walked points. The accuracy is reported against withheld check points, not asserted, and the base surface and bulk density used are stated explicitly in every report.

Can you fly volumetrics given Rosebery's rain and low cloud?

Yes, but timing is everything on the West Coast. We do not fly in rain or high wind — both degrade data and breach safety conditions — so we plan around weather windows and scope the entire programme into one flight plan, allowing a single open window to clear the whole site. Where overcast light or dust would smear a photogrammetric surface, we switch to the Zenmuse L2 LiDAR payload, which measures range directly and is far less sensitive to lighting.

Can you survey the TSFs and stockpiles in the same mobilisation?

Yes, and that is the efficient way to do it. Because the Bass Strait crossing dominates the logistics, we deliberately combine ore and concentrate stockpiles, the Bobadil and South TSFs and any waste-landform targets into one scoped visit. A single mobilisation captures the lot in cubic metres against surveyed base surfaces, with TSF surfaces differenced against the prior epoch for capacity and freeboard.

How soon do we get results after the flight?

For a standard scope, processing, QA and reporting take 24-48 hours after demobilisation, with the volume report, digital surface model, point cloud, orthomosaic and per-pile volumes delivered in your required format. Where a result is needed for month-end inventory or a pre-shipment valuation, rapid turnaround can be arranged as part of the scope.

Request a quote

If you operate at Rosebery and need stockpiles, tailings storage facilities or waste landform measured quickly, safely and to a number you can defend, ISS delivers survey-grade drone volumetric surveys into the West Coast on a scoped, fixed mobilisation.

1. Call 0407 057 015 — Speak with a surveyor who understands stockpile reconciliation, TSF capacity survey and remote West Coast logistics.
2. Receive a detailed proposal — We scope the flight programme, payload, accuracy specification, schedule, safety and deliverables for your Rosebery site.
3. Mobilise to site — We coordinate inductions, ferry, freight and equipment to hit your reporting or shutdown window in one efficient visit, weather permitting.

For recurring Rosebery volumetric programmes we offer service agreements that bundle multiple tasks into planned mobilisations and share travel cost across the scope. Talk to ISS in Rosebery about a drone volumetric survey, and contact Industrial Spatial Solutions to request a quote.

Industrial Spatial Solutions — every cubic metre measured, every tonne defensible.

Related reading: Surveyors Rosebery, volumetric UAV surveys, UAV aerial surveys overview.