Volumetric — Rosebery

TL;DR: A volumetric survey at Rosebery measures the cubic metres — and, with bulk density, the tonnes — sitting in MMG's ore and concentrate stockpiles, waste-rock dumps and the Bobadil and South tailings storage facilities, against a defined base surface. Industrial Spatial Solutions delivers a volumetric survey Rosebery operators can reconcile against, using CASA-certified drone photogrammetry and LiDAR to reach 1-3% volume accuracy, with every Bass Strait mobilisation scoped completely so the data lands in one visit. This page covers the local applications, the method, the accuracy and the standards that govern volumetric work on Tasmania's West Coast.

Key takeaways

• A well-controlled drone volumetric survey at Rosebery achieves 1-3% volume accuracy on stockpiles — tighter than the 3-5% of a GPS walkover — because the UAV captures every steep, loose, segregated face uniformly rather than interpolating between walked points.
• The single on-site concentrator makes volumetrics business-critical at Rosebery: ROM ore feed, zinc/lead/copper concentrate inventory before the road haul to Burnie, and waste-rock movement all need measured volumes for production reconciliation, not estimates.
• The Bobadil and South tailings storage facilities require recurring capacity and embankment volumetric survey for remaining-life planning and dam-safety compliance — work generalist cadastral firms are not equipped to deliver.
• The base surface (surveyed toe plane, prior survey, or design surface) changes the reported volume more than instrument accuracy does, so ISS states it explicitly in every Rosebery report — a confident number against the wrong base is still wrong.
• Tasmanian deliverables are referenced to GDA2020 and AHD, produced to ICSM standards, with drone flights flown under CASA CASR Part 101 — accepted by Mineral Resources Tasmania and your engineers without rework.

Volumetric surveying in Rosebery and the West Coast

Rosebery is a genuine mine town — around 700 people built on, and sustained by, a single deep underground operation in the steep, forested ranges beneath Mount Black and Mount Read. MMG's Rosebery mine has worked a volcanogenic massive sulphide orebody since 1936, producing zinc, lead and copper concentrates with gold and silver credits, which puts it among the longest-lived underground operations anywhere in Australia. Everything the mine extracts converges on one on-site concentrator and then on a small number of stockpiles and tailings facilities — and that concentration is exactly what makes a volumetric survey Rosebery so valuable.

Volumetric surveying answers a simple, expensive question: how much material is actually there? It measures the cubic metres held in a run-of-mine ore stockpile, a concentrate shed or pad, a waste-rock dump or a tailings cell, by capturing the full three-dimensional surface and calculating the space enclosed between that surface and a defined base. Multiply by a known bulk density and the answer becomes tonnes — the figure your reconciliation, your inventory valuation and your dam-capacity planning all depend on. At a single-concentrator operation feeding one export supply chain, the gap between an estimated stockpile and a measured one is a gap that flows straight through to reported production.

This page covers how ISS delivers a volumetric survey at Rosebery specifically: the local stockpiles and facilities we measure, the method and equipment we use, the accuracy and deliverables you receive, and the standards and island logistics that govern the work. For the underlying discipline see our volumetric surveying guide, and for the full picture of survey support across the operation see surveyors Rosebery.

Local applications: what we measure at Rosebery

Because the whole operation feeds one concentrator and one export chain, volumetric work at Rosebery concentrates on the assets that determine reported production and remaining facility life. A single drone mobilisation can sweep every surface stockpile and the tailings facilities in a morning's flying, weather permitting, so the same campaign serves inventory, reconciliation and compliance at once.

Key volumetric applications at Rosebery

The common thread is reconciliation. A concentrate stockpile measured to 2% rather than estimated to 10% changes the number you report, value and ship. A tailings cell surveyed every quarter gives a real deposition rate and a defensible remaining-life figure, rather than a guess that compounds toward an unplanned lift. A waste dump measured against its prior surface tells you exactly how much rock moved between periods. And because Rosebery's steep, high-rainfall ground makes walking a loose ore pile both slow and hazardous, capturing the surface from the air is a safety gain as much as an accuracy one.

Key point: At a single-concentrator operation, a volumetric error does not average out across many circuits — it flows straight into site-wide production and inventory figures. A measured volumetric survey at Rosebery replaces estimate with evidence on the numbers that matter most.

Method and equipment

ISS selects the volumetric method to suit the asset, the terrain and the West Coast weather rather than flying everything the same way. The aim is uniform surface coverage, a defensible base surface and a stated accuracy — not a confident number with no error budget behind it.

Drone photogrammetry and LiDAR. For most Rosebery stockpiles and the TSFs, UAV capture is the right tool. ISS flies RTK/PPK-enabled aircraft — DJI Matrice 350 RTK platforms with P1 photogrammetry payloads, and the Zenmuse L2 LiDAR sensor where light vegetation or steep portal ground needs the laser to see through cover and remove dependence on surface texture. A single flight captures every face of a pile uniformly in minutes, with no one climbing loose material and no plant interaction. All flying is conducted under CASA CASR Part 101 by appropriately licensed remote pilots, with weather windows planned around the West Coast's frequent rain and low cloud.

Ground control and georeferencing. Survey-grade ground control points are placed and observed by RTK GNSS against established control, tying the surface model to GDA2020 and AHD. On a stockpile, the toe of the pile is where volume error concentrates, so toe definition and control placement are planned, not improvised — a poorly surveyed toe plane produces a precise, confident, wrong volume.

Ground methods where flying is impractical. Inside congested plant, under cover, or where weather closes the air window, ISS captures volumes by total station or terrestrial laser scanning instead, registering to the same control. Underground mullock and bin volumes draw on scan data tied to control transferred by total station and gyro-theodolite traverse.

Processing and reporting. Photogrammetric and scan data are processed in Pix4D, Propeller and Trimble Business Center into a digital surface model, with the volume calculated against the agreed base — surveyed toe plane, prior survey, or design surface. The base is stated on every report, alongside cubic metres, applied bulk density, derived tonnage and a quality statement.

Accuracy, deliverables and cost

For Rosebery stockpiles, concentrate inventory and tailings facilities, a well-controlled ISS volumetric survey delivers 1-3% volume accuracy. That figure is not a property of the drone — it is a property of the ground control, the base-surface definition and the edge handling at the toe of the pile. ISS plans control and toe capture to hold the budget, and documents the result so the number is defensible against reconciliation. Where bulk density is supplied or sampled, volumes convert to tonnage; where it is not, volumes are reported in cubic metres against the stated base.

Deliverables are matched to use. An inventory team may need only a volume report and a period-on-period change figure; a reconciliation needs the digital surface model and the applied density; a TSF assessment needs a stage-storage capacity curve, embankment volumes and cross-sections; an earthworks claim needs cut/fill against design. ISS scopes the output before mobilising so you are not paying for modelling you do not need.

As an indicative guide only, a contained single-site volumetric survey — a set of stockpiles flown and reported — generally runs AUD $2,500-$8,000 depending on site area, pile count and reporting, inclusive of the Bass Strait crossing for equipment. A combined campaign covering the surface stockpiles plus the Bobadil and South TSFs in one mobilisation, with stage-storage capacity modelling, sits higher — AUD $10,000-$18,000+ for a multi-day scope. Field data is typically returned within 24-48 hours, with processed volume reports usually complete within a few days. Recurring monthly or quarterly programmes attract lower per-survey rates because travel is shared across the scope.

Standards and compliance in Tasmania

Mining at Rosebery operates under Tasmania's Mineral Resources Development Act 1995, administered by Mineral Resources Tasmania, alongside the Work Health and Safety Act 2012 (Tas) and its mines regulations, overseen by WorkSafe Tasmania. Volumetric survey underpins several compliance obligations directly: accurate measurement of tailings deposition and remaining capacity for dam-safety management, quantification of waste and rehabilitation earthworks, and the reconciliation that feeds royalty and production reporting.

Key survey-related points for volumetric work include:

• Datum and standards: ISS surface models and volumes are referenced to GDA2020 and AHD and produced to ICSM standards, so they are accepted by Mineral Resources Tasmania and your engineers without rework.
• CASA CASR Part 101: all ISS drone volumetric flights are conducted under the relevant remote-pilot licence (RePL) and operator certification (ReOC).
• Tailings and dam safety: TSF capacity and embankment volumetrics support remaining-life planning and dam-safety obligations for the Bobadil and South facilities, in line with ANCOLD guidance where it applies.
• Reconciliation integrity: the base surface and bulk density are stated on every report so volumes are auditable and comparable period-on-period.
• Instrument traceability: GNSS, scanning and total-station instruments are calibrated to traceable ISO standards.

Key point: A volume figure is only as defensible as its base surface and its control. ISS ties every Rosebery volumetric to GDA2020/AHD control and states the base and density explicitly, so the number stands up in reconciliation, dam-capacity planning and royalty reporting alike.

Why ISS for volumetric surveying in Rosebery

Tasmania's West Coast is a smaller, remote market, but a single-concentrator operation rewards a volumetric provider who plans around isolation rather than fighting it.

• Complete, scoped mobilisations — Rosebery is roughly 300 km from Hobart and around 130 km of winding road south of Burnie, with gear crossing Bass Strait by freight or ferry. We define every stockpile, control point, base surface and deliverable before travelling, so the full scope is captured in one visit rather than discovered as missing after demobilisation.
• Weather-aware flight planning — The West Coast receives well over 2,000 mm of rain a year, so we plan flying around realistic weather windows and carry ground-survey fallbacks when the air closes, rather than burning a mobilisation waiting for cloud to lift.
• Defensible numbers — We plan toe definition and ground control to hold the 1-3% budget, and state the base surface and applied density on every report, so the volume survives reconciliation rather than starting an argument.
• One campaign, many assets — Stockpiles, concentrate pads, waste dumps and the TSFs captured in a single planned mobilisation, sharing travel cost across the scope.
• Deliverables that fit your workflow — Surface models, volume reports, capacity curves and cut/fill in the formats your team actually uses — AutoCAD, Civil 3D, Surpac, Deswik or 12d — scoped to the job.

Frequently asked questions

How accurate is a drone volumetric survey at Rosebery?

A well-controlled ISS drone volumetric survey delivers 1-3% volume accuracy on stockpiles and tailings surfaces, tighter than the 3-5% typical of a GPS walkover, because the UAV captures every steep and segregated face uniformly. The accuracy is driven by ground control density, the base-surface definition and toe handling — not by the drone alone — so we plan and document those rather than quoting a headline number with nothing behind it.

Can ISS measure the Bobadil and South tailings facilities, not just stockpiles?

Yes. We capture TSF surfaces by UAV LiDAR and build stage-storage capacity curves, embankment volumes and deposition comparisons against prior surveys, so you have a defensible remaining-life figure and dam-capacity data rather than an estimate. The same mobilisation that flies the ore and concentrate stockpiles can cover both tailings facilities, sharing the Bass Strait travel cost across the whole scope.

Why does the base surface matter so much in a volumetric report?

Because it changes the reported volume more than instrument accuracy does. A stockpile volume measured against a surveyed toe plane, a prior survey, or a design surface will give three different numbers — all correct for their base. ISS states the base surface and the applied bulk density on every Rosebery report, so volumes are auditable and comparable period-on-period rather than quietly inconsistent.

How quickly can ISS mobilise a volumetric survey to Rosebery?

Because Rosebery is on Tasmania's isolated West Coast and equipment crosses Bass Strait, we plan around freight and ferry timing and the region's weather rather than a same-day drive — typically a few days to a week of lead time for scheduled work. We scope completely up front so a single well-planned mobilisation delivers the full capture; for recurring monthly or quarterly volumetric programmes we coordinate visits in advance and share travel cost across the scope.

Request a quote

If you need measured volumes — ore and concentrate stockpiles, waste-rock movement, or remaining capacity at the Bobadil and South TSFs — at Rosebery or across the West Coast minerals province, talk to ISS about a scoped, fixed-price volumetric survey.

1. Call us on 0407 057 015 — Speak with a surveyor who understands stockpile reconciliation, tailings capacity and remote West Coast logistics.
2. Receive a detailed proposal — We set out the method, base surface, accuracy specification, deliverable scope and a fixed-price quotation, with mobilisation to the West Coast laid out clearly.
3. Mobilise to site — We coordinate access, inductions, ferry, freight and equipment to align with your timing in one efficient visit.

For recurring Rosebery programmes — monthly stockpile inventory or quarterly TSF capacity survey — ISS offers service agreements that bundle multiple tasks into planned mobilisations and share travel cost across the scope. Call 0407 057 015 to request a quote.

Industrial Spatial Solutions — measured volumes, defensible numbers, and planned around Tasmania's island logistics.

Related reading: Volumetric surveying guide, Surveyors Rosebery