Mining Camp Planning: Layout, Amenity Ratios & Compliance

Mining camp planning is the engineering discipline of scoping, sizing, and laying out a remote-site workforce accommodation facility so it meets operator standards, regional compliance, and logistical constraints before a single donga leaves the factory. The output of a planning exercise is a camp-design package covering headcount model, amenity ratio schedule, services load, site plan, and a compliance matrix against Standards Australia and operator-specific benchmarks. Planning is distinct from procurement; procurement selects suppliers and places orders while planning defines what the camp needs to be. A camp scoped in isolation from the resource plan, rotation pattern, and operator standard will almost always trigger rework after deployment, which on SCS-deployed projects runs at roughly a six-times cost multiplier versus the design-stage fit-out (SCS Global project records, 2019 to 2026, anonymised). Running the planning exercise properly compresses commissioning timelines and removes the most common cause of operator-audit rework.

Start from the resource plan: how many workers live on site during peak operation, and what proportion are rotating. A "200-person camp" typically means 200 simultaneous beds, sized against the operator standard the client is working to. Fly-in fly-out (FIFO) rotations generally assume 1.1 to 1.15 times beds to heads, which covers the transition days where outgoing and incoming crews overlap; drive-in drive-out (DIDO) operations usually run one-to-one. Add 5 to 10 per cent contingency beds to absorb visiting auditors, contractors, and short-term scope changes without forcing emergency accommodation orders. Bed count drives every downstream number: BHP GLD-21 and the Rio Tinto WA accommodation standard both size amenity schedules directly from the peak-rotation bed figure (BHP GLD-21 Accommodation Standard). Under-sizing is the most common mining-camp planning mistake, because remedial accommodation runs at roughly six times design-stage cost.

Tier-1 mining operators publish amenity ratios that suppliers must meet, and an SCS planning package benchmarks the design against the highest-common-factor ratio across all named operators on the project. Typical targets are 1 shower per 4 beds, 1 toilet per 4 beds, 1 laundry machine per 20 beds, 1.5 kitchen covers per bed per sitting, and 1 mess seat per 2 beds. Over-supply is always cheaper than under-supply, because under-spec on amenity ratio is the single most common reason a camp design is returned for revision at operator audit. BHP GLD-21, Rio Tinto WA-Accom-STD, and Fortescue Metals Group drive the Australian benchmark, while MOM Singapore and FEDA UAE drive the equivalent across Southeast Asia and the Middle East. The standard also sets the upper bound on donga-to-ablution travel distance at 60 metres (BHP GLD-21 Accommodation Standard), which becomes the primary constraint on row length.

Every bed adds measurable services load. The industry-average planning numbers for a full-amenity rotation camp are 250 litres per bed per day of fresh water (Australian Mining Camp Utilities Report 2024), 15 kilowatt-hours per bed per day of electrical (AusIMM Energy Benchmarking 2023), and 200 litres per bed per day of sewage (Queensland Mining Sustainability Report 2024). A 200-bed camp therefore needs 50 kilolitres per day of water, 3 megawatt-hours per day of electrical with a peak draw around 250 kilowatts once kitchen and laundry load is included, and 40 kilolitres per day of sewage treatment. These numbers drive plant sizing, on-site storage, trucking schedule, and genset redundancy more than any other single planning decision. AS/NZS 3500 governs the plumbing systems that move water and sewage between bedrooms, kitchens, and the treatment plant, and is the reference any operator will audit against.

Plan donga rows no longer than 12 units to keep ablution-block travel distance under 60 metres, per the BHP GLD-21 operator benchmark (BHP GLD-21 Accommodation Standard). Keep mess and kitchen adjacent, because the mess is the highest-traffic building during service windows, and an inefficient kitchen-to-mess connection multiplies the labour hours required to run it. Separate the mess from sleeping zones by at least 50 metres to reduce noise transfer during night-shift sleeping hours. Emergency egress paths must be continuous, illuminated, and signposted as a state mining regulator requirement in most Australian jurisdictions, and explicit in MOM Singapore worker-accommodation code. Laundry, gym, and recreation buildings should cluster opposite the mess; separating them from sleeping zones prevents 24-hour traffic past bedroom dongas. Layout compliance tests egress distances, amenity ratios, accessibility, and service redundancy against the published operator standard.

Compliance-ready means the camp can be presented to an operator auditor or state mining regulator without modification. Every donga carries a certification envelope: AS/NZS 3000 electrical, AS/NZS 3500 plumbing, regional cyclone rating where applicable (C1, C2, C3, or C4 per AS/NZS 1170.2), and the operator-specific accommodation standard (BHP GLD-21, Rio Tinto WA-Accom-STD, Fortescue, or regional equivalent). Layout compliance tests fire egress distances, amenity ratios, accessibility (DDA or equivalent), and service redundancy. A compliance-ready package also carries an operations handover pack covering services schematic, equipment schedule, maintenance intervals, and operator-training handover for kitchen, laundry, and water treatment plant. Missing handover documentation is the most common reason a camp commissioning date slips past plan, and the industry benchmark for rework on running-site scope changes is approximately six times design-stage fit-out cost (SCS Global project records, 2019 to 2026).