Botswana's mines are going underground and paying more for power. The record has to keep up.

The operations, and what each one has to measure

The underground turn

Botswana's diamond mining is moving below the pit floor, and the Regulations were written for that. The Mines, Quarries, Works and Machinery Regulations give every manager a ventilation officer to appoint and a Part on ventilation, dust and toxic gases to comply with; a separate Part covers noise and vibration, another the winding plant, and where the installed electrical load exceeds 750 kW a competent electrical engineer must be in place. The 2025 Budget Speech said it plainly: the transition to underground mining is a skills event for the country. It is also an instrumentation event. Fixed airflow and gas sensors that report continuously, vibration on fans and winders, and an electrical record that an engineer can sign off are what turn a new underground section into a set of records rather than a set of assumptions. Karowe's shafts and Jwaneng's exploration-access phase are the first of these; Khoemacau's Zone 5 is already a mechanised underground operation with an expansion to double it.

Power as a production variable

BPC sold mines 882 GWh in its last reported year, up 9%, while the utility imported 37% of what it dispatched and Morupule B's energy availability factor slipped to 52%. In December 2025 the regulator published BPC's application for a 46% average increase for 2026/27, with the mining tariff moving from P1.60 to P2.24 per kWh — 40% — and "unreliable local generation and heavy reliance on imported power" among the stated reasons. Large customers supplied at 11 kV pay a maximum-demand charge on top of energy. That makes the power interface the most valuable measurement on the property: maximum demand by section, load profile against the shift, the grid-to-genset transitions and the fuel they consume, and tonnes against all of it, so that energy per tonne becomes a number the operation manages rather than a line the finance team discovers. Our energy-per-tonne page for Zambia describes the same instrument set; the Botswana version reads BPC's tariff categories instead of ZESCO's. Page: generator and power monitoring in Botswana.

Water: dewatering, reuse and the Water Apportionment Board

The National Water Policy sets national demand at around 250 million cubic metres a year, notes that self-providers — minerals, livestock and wildlife — take more than half of it, and asks for water balances to be fully accounted for in every mining operation and for mine dewatering and effluents to be brought into the permitting system. Abstraction and discharge rights come from the Water Apportionment Board, with the Department of Water Affairs as secretariat; the Waste Management Act lets the Director restrict operations near underground water without agreed engineering works. Karowe shows what the record looks like at a deep pit: 28 active dewatering boreholes, groundwater monitored through boreholes and piezometers, deep-unit water at up to 46,000 mg/L dissolved solids, no fresh water in processing and tailings return water back to the plant. Flow on every dewatering and transfer line, level and conductivity in the monitoring boreholes, and a water balance that closes on a dashboard is the instrument set — and for any discharge, quality against BOS 93 as described on our discharge compliance page.

Tailings: the standard and the named facilities

The Global Industry Standard on Tailings Management asks for an engineering monitoring system built for the facility's potential failure modes, measurable performance indicators recorded at appropriate frequencies, analysis at the frequency the engineer of record sets, trigger-action response plans and at least annual reporting. ICMM members — Anglo American, which owns De Beers, and MMG among them — committed to it, with the highest-consequence facilities due first. Anglo American's public tailings database lists the Debswana facilities it does not manage: Jwaneng's active FRD 7 and several inactive upstream-raised facilities at Jwaneng and Orapa carry "Very High" consequence classifications, with dam-breach analyses dated 2016 to 2021. None of that is a comment on their condition; it is the reason continuous piezometric, seepage, displacement and freeboard instrumentation with telemetered trigger thresholds is now the expected record on a Botswana residue facility, whoever owns it. Our mining water compliance analysis reads the standard alongside four national regimes.

Rotating assets and the road from Johannesburg

The list is short and the spares are far away: mills, crushers, conveyor drives, slurry and dewatering pumps, ventilation fans, winders. Wireless vibration and temperature nodes on that list, trended against the same power record, give a bearing weeks of warning — enough to bring the spare up the road from Johannesburg before the failure rather than after it. The same nodes satisfy the Regulations' vibration provisions for machinery, and a belt-condition and stockpile-level record on a coal conveyor feeding a power station is, in Botswana's case, a grid-stability record as well. Regional comparison: our Africa mine monitoring map.

Safety records the inspector can ask for

The Regulations require any breach known to the manager to be reported to an inspector in writing, and carry dedicated Parts on accidents and mine rescue; Debswana's 2024 policy names tailings management, waste and mine closure inside its safety scope and holds ISO 45001 at Orapa, Letlhakane and Damtshaa. The country's published trajectory is a long one — reportable serious injuries fell from 73 in 1998 to 16 by mid-2013 in the Minister's figures of that year. Monitoring does not replace any of that; it makes the gas, airflow, vibration and electrical records the inspector asks for exist before the visit.

Obligation, parameter, instrument