Outage Surveys — Alice Springs

TL;DR: An outage survey is precision dimensional control delivered inside the fixed window when a Central Australian plant is taken offline for overhaul — and in the Centre, every survey-driven hour lost is doubly expensive because crews, parts and instruments all arrive after a 135-to-550-kilometre haul from Alice Springs. Industrial Spatial Solutions plans the shutdown survey to the hour, holds alignment to ±0.3–1.0 mm and as-built scans to 2–6 mm at 50 m, and engineers the work to stay off your critical path for processing plant shutdowns at sites such as Newmont's Tanami operation and Arafura's Nolans Project. A well-scoped shutdown survey Alice Springs operators can rely on protects the window rather than blowing it.

Key takeaways

• Remote outages magnify the cost of overrun: a generating-unit or processing shutdown loses $50,000–200,000 per hour offline, and in Central Australia a slipped window also strands flown-in fitters and freighted components on remote-area day rates — so the outage survey must never sit on the critical path.
• ISS delivers outage alignment to ±0.3–1.0 mm, coupling coaxiality to ±0.02–0.05 mm with a FARO tracker, and registered as-built point clouds at 2–6 mm at 50 m using Leica MS60 MultiStation, TS16 total stations and RTC360 scanners, all calibrated to ISO 17025.
• Tanami's mill, crusher and shaft-infrastructure overhauls and Nolans' processing-plant change-outs are the high-value shutdown targets around Alice Springs — both hundreds of kilometres out, both demanding single-trip, redundancy-equipped mobilisation.
• The work splits into pre-outage baseline capture, control establishment, in-outage alignment and fit-check, and post-outage as-built verification before recommissioning — scoped 4–6 weeks ahead so scope is resourced, not discovered mid-window.
• Deliverables are produced to ICSM SP1 and assessed against AS 1418.18 (crane runways), AS 4100 (steel) and OEM tolerances, with drone fit-check work flown under CASA Part 101 — all supplied in your mine grid or GDA2020 ready for recommissioning sign-off.

Outage surveys in Central Australia: the window is the project

An outage survey is the alignment, fit-check and as-built measurement work carried out while an industrial asset is shut down for a defined maintenance outage. The term comes from power generation — a unit outage on a coal-fired set — but it applies equally to a mineral-processing shutdown, a SAG or ball mill reline, a crusher rebuild or a calciner change-out. Wherever a line is deliberately taken out of service and must be put back within tolerance, the outage survey proves each step before the next one starts.

Around Alice Springs that discipline collides with the defining feature of the Centre: distance. There is no port and no heavy manufacturing here — the survey market is built on mining and critical-minerals processing spread across hundreds of thousands of square kilometres of the Tanami Desert and the Arunta province. Newmont's Tanami gold operation sits over 550 kilometres north-west of town; Arafura Rare Earths' Nolans Project is 135 kilometres north on the Stuart Highway. When one of these plants schedules a shutdown, the maintenance crew, the replacement rotor or mill liner, and the survey team all converge on a site a full day's logistics from the nearest depot.

That is why a generic alignment provider rarely works in the Centre. A method that is "more accurate" but two hours slower can cost more than it saves when the window is fixed and the next mobilisation is a week away. A failed instrument 600 kilometres from base does not mean a quick trip back to the office — it can end the survey and extend the outage. The shutdown survey Alice Springs projects demand is therefore one engineered around the schedule, equipped with full redundancy, and executed by surveyors who plan for heat, dust and travel rather than treating the site like a metro call-out.

Key point: An outage survey is not a routine alignment job that happens to fall during a shutdown. The defining constraint is the window — and in Central Australia the window is wrapped in logistics. Methodology, crew size and instrument selection are all chosen to finish the work in one trip, off the critical path.

Where outage surveys happen around Alice Springs

The Centre's outage demand is concentrated in a handful of high-value operations. Each runs rotating and fixed plant that can only be measured cold and open, which is exactly when an outage survey earns its place.

Key shutdown and overhaul sites in the region

Tanami is the most survey-intensive of these. Newmont's expansion includes a 1,460-metre production shaft — one of the deepest in Australia — and the processing circuit that feeds it runs SAG and ball mills, crushers and rotary equipment that all come due for periodic relines and rebuilds. A mill reline window inside a shutdown is short and unforgiving: girth-gear and pinion alignment, trunnion and bearing positions, and baseplate flatness must be measured, corrected and verified before the mill is closed up and the circuit restarted. Get it wrong and the operator either reworks mid-window or restarts a mill that sheds throughput and bearing life.

Nolans, as a circa $1.7 billion neodymium-praseodymium development, transitions from construction set-out into a recurring operational outage cycle. Once the processing plant and tailings facility are running, change-outs of pumps, crushers and rotary kilns or dryers all become time-bound outage work — fit-checked before the lift, aligned during the rebuild, and captured as-built before recommissioning.

$50,000–200,000        550 km
Cost per hour of        Distance, Alice Springs
plant downtime          to Tanami
(industry, 2024)        (Newmont, 2024)

Method and equipment for a remote outage

ISS runs outage surveys to a five-phase protocol refined across power, refining and mineral-processing turnarounds. The sequence holds whether the window is two days or three weeks; in the Centre, the planning phases simply carry more weight because there is no margin to recover a missed mobilisation.

Scope and methodology (4–6 weeks out). ISS reviews the outage work list, isolates every survey-dependent activity and maps a measurement methodology against the schedule. For remote sites a pre-outage site visit confirms access tracks, hazards, control requirements and line of sight — and confirms that a flooded road will not strand a crew 600 kilometres from base.

Control establishment (1–2 weeks out). A stable 3D control network is set out around the work area with a Leica TS16 or MS60 MultiStation, using monumented or semi-permanent references positioned to survive scaffolding, crane movements and demolition. Establishing control before the area is congested is the single biggest time-saver during the outage itself.

Pre-outage baseline. As-found geometry is captured while the plant still runs or immediately after stop — rotating-equipment centrelines, tyre and roller positions, bearing elevations, removal clearances and structural references for reassembly.

In-outage execution. The core of the shutdown survey. ISS measures in sequence with mechanical activity: dimensional verification after removal, alignment setting during rebuild, fit-check and clearance survey before installation, and level and flatness on cleaned foundations. Automatic Target Recognition and reflectorless measurement keep technicians clear of live lifts.

Post-outage verification. A final pass confirms every adjusted component is in tolerance and captures the as-built condition before recommissioning.

The instrument is matched to the task, not used by default. The Leica MS60 MultiStation (±1 mm + 1.5 ppm, 1″ angle) combines angle, distance and scanning in one setup — valuable when setup time is the constraint. The Leica RTC360 captures dense point clouds at 2–6 mm accuracy at 50 m, with a full setup in under two minutes, making it the fastest route to comprehensive as-built and fit-check capture. For the tightest work — turbine couplings, large bearing bores, machined seating faces — a FARO laser tracker delivers ±0.015–0.025 mm. Open Central Australian skies also make this strong drone country: pit and stockpile fit-check volumetrics fly under CASA Part 101 when an outage touches materials-handling.

Key point: Scanning and total-station work are complementary on an outage. The scanner captures the whole condition for as-built and fit-check; the MultiStation and tracker deliver the sub-millimetre numbers the mechanical team signs against. Every crew mobilising to the Centre carries redundant instrumentation so a single failure never stops the line.

Accuracy, tolerances and standards

Outage survey accuracy is matched to the engineering tolerance of the task, then verified against the relevant standard. ISS supplies measurement uncertainty statements with alignment deliverables, and all instruments are ISO 17025 calibrated and traceable to national standards.

Where the work touches crane runways, results are assessed against AS 1418.18; structural steel against AS 4100; and OEM or project tolerances apply where they are tighter than the code. Deliverables are produced to ICSM SP1 and supplied in your required datum and mine grid, ready for direct use in recommissioning records and statutory plans without rework or reformatting.

What you receive — and when

ISS scopes deliverables during planning so there are no surprises at handover. A typical outage survey package includes a pre-outage baseline report; in-outage alignment reports with deviation tables and tolerance compliance issued as each activity completes; fit-check and clearance go/no-go advice ahead of lifts; as-built survey plans; registered laser-scan data (E57, RCP or native); a recommissioning compliance summary issued before restart; and a consolidated full report within 5–10 business days.

Critical results — anything a lift or coupling decision depends on — are reported verbally and in writing on the spot. The formal report never holds up the outage. On a remote site where the next crane window may be days away, that on-the-spot reporting cadence is the difference between a clean restart and a costly hold.

Why ISS for outage surveys in the Centre

The Northern Territory's surveyor shortage is real — the national profession faces a shortfall of nearly 1,400 specialists, and the NT is among the hardest-hit jurisdictions. Dependable, mining-specialised outage survey capacity that can self-supply for a remote deployment is genuinely scarce in Central Australia, which is exactly the capability ISS brings.

• Single-trip, self-sufficient mobilisation — remote outages are scheduled with travel and weather buffers, and crews carry full equipment redundancy and consumables so the survey finishes in one mobilisation.
• Outage discipline — scope locked 4–6 weeks out, control set before congestion, attendance scheduled against the work list so measurement is ready the moment an area is, never holding the critical path.
• Mining and processing specialisation — mill, crusher, rotary-equipment and structural alignment, not generalist cadastral work that happens to own a total station.
• OEM independence — we align and verify equipment from any manufacturer with consistent methodology.
• Mine-ready data — deliverables in Surpac, Vulcan, Deswik, AutoCAD or your preferred format, in your mine grid or GDA2020, to ICSM SP1.

This page sits within our wider Alice Springs surveying coverage, and draws on the full ISS outage survey methodology developed across power, refining and mineral-processing turnarounds nationally.

Frequently asked questions

How quickly can ISS mobilise an outage crew to Alice Springs sites?

Remote outage work is planned, not instant — and that is its strength. Because the costliest failure is a wasted long-haul mobilisation, we lock scope 4–6 weeks before the window, complete a pre-outage site visit, and schedule crews so they arrive with the right instruments and supplies to finish in one trip. For Alice Springs town and near-region work we coordinate quickly; for Tanami or far-field sites we build travel and weather buffers into the plan.

What accuracy do you hold during a Central Australian shutdown?

Mill and rotating-equipment alignment is typically ±0.3–1.0 mm with total station and MultiStation, and ±0.02–0.05 mm for coaxiality and concentricity using a FARO laser tracker. Baseplate flatness is ±0.2–0.5 mm, fit-check ±1–2 mm, and as-built scanning 2–6 mm at 50 m. All instruments are ISO 17025 calibrated, deliverables are produced to ICSM SP1, and uncertainty statements accompany alignment results.

Can the outage survey be done without extending our window?

Yes — that is the entire point. Well-planned shutdown survey work runs parallel to mechanical activity and stays off the critical path. ISS measures when an area is ready and reports the result before the next activity needs it. Overruns come from late scope and missing control, both of which planning eliminates — and on a remote Central Australian site, that planning matters more, not less.

What outage work do you support around Alice Springs?

Primarily mineral-processing and gold-plant shutdowns — SAG and ball mill relines, girth-gear and pinion alignment, crusher rebuilds and gaping, conveyor alignment, and rotary-equipment change-outs — at operations such as Tanami and the processing circuits being built and run at Nolans. We also provide pre-outage fit-check scanning and post-install as-built verification for any component change-out where the new part must fit existing structure.

Request a quote

If you have a mill reline, crusher rebuild, plant tie-in or processing shutdown coming up at an operation around Alice Springs or anywhere in Central Australia, talk to ISS early — the further out we scope, the tighter and cheaper the outage survey.

1. Call us on 0407 057 015 — speak with a surveyor who understands both sub-millimetre outage alignment and the logistics of the Centre.
2. Receive a detailed proposal — methodology, schedule, safety plan and fixed-price quotation mapped to your outage window.
3. Mobilise to site — we coordinate access, travel, equipment and attendance around your shutdown timeline and the season.

Outage windows do not wait. Contact ISS to scope your shutdown survey Alice Springs project and request a fixed-price quote.

Industrial Spatial Solutions — outage specialised, remote capable, Central Australia ready.