TL;DR: A drone inspection survey at Rosebery puts a high-resolution camera onto MMG's concentrator structures, conveyor galleries, headframes, stacks and tailings embankments without scaffold, EWPs or rope-access crews — capturing defects at 1-3 mm/pixel while the plant keeps running. For an isolated single-concentrator operation on Tasmania's wet, steep West Coast, that means a complete photographic condition record gathered in hours rather than days, in one mobilised visit across Bass Strait. Industrial Spatial Solutions delivers CASA-compliant drone visual inspection at Rosebery, classified against the relevant AS standards and integrated with our wider engineering and mechanical survey work.
Key takeaways
- A drone inspection survey Rosebery engagement removes people from height across MMG's concentrator stacks, conveyor gantries, headframes and the Bobadil and South TSF embankments — eliminating the highest-risk access tasks under the Work Health and Safety (Mines) framework rather than relying on harnesses and platforms.
- ISS captures close-range imagery at 1-3 mm/pixel ground sampling distance (GSD), resolving hairline cracking, weld-toe defects, coating breakdown and corrosion to the standard of a hands-on close visual inspection under AS 4100 and AS 3788.
- Because Rosebery runs a single on-site concentrator the whole operation depends on, drone inspection lets you assess high and live structures without standing the plant down — where an unplanned mill or conveyor outage runs well into six figures per day in lost concentrate.
- All flying is conducted under CASA CASR Part 101, with ISS holding a Remote Operator Certificate (ReOC), licensed RePL pilots, registered aircraft and aviation-endorsed public liability cover — so MMG carries no aviation compliance burden.
- The West Coast's 2,000 mm-plus annual rainfall and low cloud make weather windows the binding constraint, so ISS scopes the full inspection up front and captures everything in one Bass Strait mobilisation rather than risking a partial, weather-curtailed visit.
Why a drone inspection survey suits Rosebery
Rosebery is a working mine town built on one of Australia's longest-running underground operations — MMG's zinc-lead-copper-gold-silver mine, in continuous production since 1936 beneath Mount Black and Mount Read. The whole site funnels through a single on-site concentrator, and that concentration of value is exactly why a drone inspection survey makes sense here. The assets that matter — the concentrator structure, the crushing and grinding gantries, the conveyor runs, the headframe, the stacks and ducting, and the embankments at the Bobadil and South tailings storage facilities — are tall, live and corrosion-exposed. Inspecting them the traditional way means scaffold, elevated work platforms or rope-access technicians, every one of which is slow, costly and high-risk in steep, wet terrain.
A UAV reaches those same surfaces in minutes, flies a repeatable path at a controlled stand-off, and brings the inspector a sharper view than a person leaning out of a cherry picker. Critically, it does so without taking the concentrator offline. At a single-concentrator operation an unplanned stoppage hits the entire site's throughput at once, so any inspection method that lets you look without stopping carries outsized value at Rosebery specifically. The drone is a remote-sensing tool: the engineering judgement stays with a competent person who reviews the imagery afterwards and classifies what is found.
The West Coast environment is the other half of the case. This is one of the wettest parts of Australia, with persistent rain and low cloud across the ranges. That degrades GNSS, complicates surface access and makes timing critical for any aerial work — but it also accelerates coating breakdown and corrosion on exposed steelwork, which is precisely what a periodic drone visual inspection is built to track over time.
Key point: At Rosebery the value of a drone inspection survey is not just safety — it is the ability to gather a complete condition record of high, live, corrosion-prone assets in a single weather window, without interrupting the one concentrator the whole operation relies on.
Local applications: where drone inspection earns its place at Rosebery
The Rosebery operation and the wider West Coast resources province generate a clear set of inspection targets where UAV access beats hands-on access on safety, speed and cost.
| Asset | Why drone inspection suits it | Defects of interest |
|---|---|---|
| Concentrator stacks and ducting | Tall, hot, hard to scaffold | Coating breakdown, cracking, corrosion |
| Crushing / grinding gantries | Live structure, awkward geometry | Fatigue cracks at truss nodes, fastener loss |
| Conveyor galleries and transfer towers | Long runs, working at height | Structural movement, corrosion, spillage damage |
| Headframe and shaft structures | High, legacy steel | Corrosion, weld defects, member distortion |
| Bobadil / South TSF embankments | Large footprint, restricted access | Crest settlement, erosion, seepage staining, drainage |
| Conveyor / portal slopes | Steep, unstable ground | Rockfall hazard, vegetation encroachment |
These targets cover the full asset lifecycle of condition monitoring: a baseline drone inspection survey establishes the current state, and each subsequent flight is compared against it so deterioration is measured rather than guessed. The same logic extends across the West Coast — Renison Bell's tin operation, Grange Resources' Savage River magnetite mine and the Port Latta pelletising plant, and the region's headframes, bins and conveyor infrastructure all present the same height-plus-corrosion inspection problem that drone capture solves without standing down production.
Drone inspection is also the natural front end of a Rosebery shutdown. In a planned concentrator outage, a UAV captures asset condition faster than scaffold can be built — feeding the shutdown scope beforehand and verifying repairs afterwards. This pairs directly with ISS's mechanical and shutdown survey work on the mills, pinions and conveyors, so a single mobilisation can both inspect and measure.
Method and equipment
ISS flies high-stability multirotor platforms carrying mechanical-shutter RGB sensors in the 20-45 MP class. At a 5 m stand-off these resolve a GSD of roughly 1-1.5 mm/pixel — fine enough to identify hairline cracking, weld defects and early coating breakdown. Obstacle sensing and precise position hold allow safe close-range work near steelwork and around the concentrator structure. The inspection is planned as a series of controlled passes at a fixed stand-off, typically 3-10 m from the surface, using automated structure-following missions so coverage and overlap are guaranteed rather than left to the pilot's eye.
Where stand-off cannot be reduced — a hot stack, a restricted exclusion zone, energised plant — a long-range optical zoom payload captures detail from a safe distance, and a radiometric thermal sensor (better than 0.05 °C NETD) adds anomaly detection for overheating bearings and motors, blocked or wet refractory, and electrical hot spots. Where defects must be located on a 3D model or compared between inspections, ISS establishes ground control with Leica and Trimble GNSS and total station equipment, tying the data to GDA2020 and AHD so defect positions are repeatable to within 20-50 mm over time.
Before demobilising, the crew reviews imagery on site for focus, exposure, coverage and overlap against the asset map — because at a remote West Coast site, re-flying a missed face is a matter of minutes, but discovering the gap back on the mainland means another Bass Strait mobilisation. Imagery is then processed into the agreed deliverable: a geotagged image library, an orthomosaic of each face, or a textured 3D model with defects pinned in 3D.
| Parameter | ISS specification | Notes |
|---|---|---|
| Image GSD (close range) | 1-3 mm/pixel | At 3-10 m stand-off |
| Smallest resolvable defect | ~0.5 mm crack width | Subject to lighting and surface |
| Defect location (georeferenced) | 20-50 mm | With ground control to GDA2020/AHD |
| Thermal sensitivity | <0.05 °C NETD | Radiometric payload |
| Coverage completeness | 100% of nominated faces | Verified against asset map on site |
As an indicative guide only, a focused single-asset drone inspection at Rosebery — a stack, a headframe, a transfer tower — typically runs from around AUD $4,000-$8,000 inclusive of West Coast travel and the Bass Strait crossing, with multi-asset or full-site condition programmes scoped accordingly. A 3D model, thermal pass or baseline-comparison report adds to that where the asset is inspected repeatedly. Every job is quoted against a defined scope, GSD and deliverable schedule rather than a day rate alone.
Standards and compliance
A Rosebery drone inspection sits within two regulatory frames. The flying is governed by CASA under CASR Part 101 and its Manual of Standards: ISS operates under a current Remote Operator Certificate (ReOC) with licensed RePL pilots, registered aircraft and aviation-endorsed public liability insurance, and manages all airspace assessment and exclusion-zone control on your behalf. MMG carries no aviation compliance burden — the operator simply provides site access and the relevant inductions.
The inspection itself is conducted against the standard relevant to the asset — AS 4100 for structural steel on the concentrator and conveyor galleries, AS 3788 for the external condition of in-service pressure equipment, AS 1418 and AS 2550 where cranes and runways are involved, and dam-safety guidance such as ANCOLD for the TSF embankments. Underground and structural work at Rosebery operates under Tasmania's Mineral Resources Development Act 1995 and the Work Health and Safety (Mines) framework regulated by WorkSafe Tasmania, which requires monitoring of structures where there is a credible risk of failure — a duty that periodic drone condition inspection helps discharge. Where the inspection captures geometry, deliverables are referenced to GDA2020 and AHD and produced to ICSM and Tasmanian survey standards.
⚠️ Watch out: A drone inspection does not by itself satisfy every mandated regime. Some pressure-equipment and crane standards still require hands-on or NDT inspection at defined intervals. Used well at Rosebery, a drone survey extends the interval between intrusive inspections and targets them where they are needed — it does not blindly replace them. ISS confirms the regime that applies to your asset during scoping.
Why ISS for drone inspection at Rosebery
ISS is an independent industrial surveying firm — not tied to any aircraft brand or maintenance contractor — so the inspection serves your asset, not an upstream agenda. More importantly for a remote single-operator field, the same team that flies the UAV and aerial surveys also runs our engineering and mechanical survey work at Rosebery. When a drone inspection finds something that needs measuring — a distorted member, a misaligned conveyor, a settling embankment — we can bring a total station, laser scanner or photogrammetric capability to bear in the same mobilisation, without re-engaging a new contractor across Bass Strait.
That integration is the whole point at an isolated site. The defining logistical fact about Rosebery is distance: roughly 300 km from Hobart, around 130 km of winding road south of Burnie, with heavy equipment crossing Bass Strait by sea freight or vehicle ferry. The ISS model is built around making each mobilisation count — scoping the complete inspection up front, capturing it in one weather-aware visit, and turning the report around quickly after demobilisation. Our surveyors hold current generic and site-specific mine inductions and the tickets needed to work on Rosebery's underground and processing operations.
Frequently asked questions
Can a drone inspection be done while the Rosebery concentrator is running?
Usually, yes. The capture is non-contact, and most live assets — stacks, conveyor galleries, headframes — can be inspected without standing down the concentrator, provided an exclusion zone can be maintained around people and operating plant. That is a significant advantage at a single-concentrator operation where any stoppage hits the whole site. Energised and very hot surfaces are flown from a safe stand-off using an optical zoom or thermal payload.
How does ISS handle Rosebery's high rainfall and low cloud?
Weather windows are the binding constraint on the West Coast, so ISS plans the flying around them and scopes the full inspection before mobilising — every face, every asset, every deliverable — so a single weather window captures the complete record. On-site QA against the asset map before demobilising means a missed face is re-flown in minutes rather than triggering another Bass Strait trip.
What accuracy and detail does a Rosebery drone inspection achieve?
For condition assessment, ISS captures imagery at 1-3 mm/pixel GSD on close-range work, resolving hairline cracking, weld defects and early coating breakdown — comparable to a hands-on close visual inspection under AS 4100 and AS 3788. Where geometry is required, ground control tied to GDA2020/AHD locates defects to within 20-50 mm on a 3D model for repeat monitoring.
Does MMG need its own CASA approval for the drone work?
No. As the operator, ISS holds the Remote Operator Certificate and manages all CASR Part 101 compliance, airspace approvals and aviation insurance. The site simply provides access and the relevant Rosebery inductions while ISS handles every part of the aviation compliance.
Request a quote
If access, height or downtime is making your structural and asset inspections at Rosebery slow, expensive or hazardous, a drone inspection survey is very likely the safer and cheaper path — and on tall, live concentrator and conveyor assets the payback usually lands on the first inspection. Tell us the asset, the defects you care about and your shutdown or weather window, and ISS will scope a fixed-price drone inspection, recommend the right payload and deliverables, and manage every part of the CASA compliance and West Coast logistics.
- Call 0407 057 015 — Speak with a surveyor who understands remote mining inspection, concentrator structures and West Coast mobilisation.
- Receive a detailed proposal — We scope methodology, GSD, applicable standards, schedule, safety and deliverables for your Rosebery assets.
- Mobilise to site — We coordinate inductions, ferry, freight and weather windows to capture the complete inspection in one efficient visit.
For recurring condition programmes we bundle multiple Rosebery inspections into planned mobilisations and share travel cost across the scope. Contact Industrial Spatial Solutions to request a quote.
Related reading: Surveyors Rosebery, drone inspection survey services.