Thirty kilometres east of Windhoek lies the Otjihase Mine — a name synonymous with both Namibia’s industrial past and its quiet resilience in the face of global commodity cycles.
Alongside Matchless, Otjihase forms one of the twin anchors of the Khomas Copper Belt, a region that has supplied Namibia with ore, jobs, and experience stretching back nearly six decades.
The story of Otjihase begins in the early 1960s, when Tsumeb Corporation Limited (TCL), already renowned for its world-class polymetallic mine in northern Namibia, turned its attention to the copper-bearing horizons east of Windhoek.
Geophysical surveys conducted between 1962 and 1965 delineated a series of stratabound sulphide lenses hosted in schists and amphibolites — the same Kuiseb Formation rocks that carry mineralisation westward toward Matchless.
Drilling soon confirmed what prospectors had long suspected: Otjihase was a major copper system waiting to be mined.
According to TCL’s internal geological bulletins (1968–1972), the deposit consisted of several parallel ore zones containing chalcopyrite, pyrite, and pyrrhotite.
The main orebody stretched over two kilometres in strike length, dipping gently northward, with high-grade shoots of 2–3% copper at depth.
The company began development in 1970, sinking declines and constructing a processing plant designed to produce copper concentrate for export through Walvis Bay.
Mining began in 1973, with production stabilising at 30,000 to 40,000 tonnes of concentrate per year, according to archival mine reports held by the Geological Survey of Namibia.
Ore was hauled by truck and rail to Tsumeb, where it was smelted into blister copper for international markets. Otjihase quickly became one of central Namibia’s largest employers, drawing workers from Windhoek’s eastern settlements and surrounding farms.
By the 1980s, the Otjihase operation had matured into a cornerstone of TCL’s copper portfolio. The mine’s underground workings extended several hundred metres below surface, with longhole stoping and backfilling employed to manage the narrow but continuous ore zones. However, as global copper prices weakened and groundwater inflows increased, operations became uneconomical. TCL closed Otjihase in 1983, placing it under care and maintenance.
The mine remained idle for more than a decade until Ongopolo Mining & Processing Ltd, a Namibian successor to TCL, reactivated it in the late 1990s. Production resumed modestly, but the genuine revival came in 2006, when Weatherly International plc acquired Ongopolo and consolidated Otjihase with Matchless under its “Central Operations.”
Between 2011 and 2015, Weatherly operated both mines concurrently, with ore from Otjihase being fed into a refurbished concentrator.
The 2015 Weatherly Annual Report recorded that Otjihase contributed the majority of the combined output of 172,000 tonnes of ore, containing 1.9% copper, mined from the two operations before the final suspension in September 2015. Weatherly cited persistent water inflows, power interruptions, and a depressed copper price below US$5,000 per tonne as the main factors behind the shutdown.
The National Archives of Namibia and former TCL records estimate that since its commissioning, Otjihase has produced over 30,000 tonnes of contained copper metal, making it one of Namibia’s most productive inland copper mines outside Tsumeb.
Ownership passed to Consolidated Copper Corp. (CCC) in 2023, along with Matchless, under a transaction approved by Namibia’s Competition Commission. According to CCC’s 2023 technical statement, the combined Mineral Resource for Otjihase and Matchless stands at 4.5 million tonnes grading 2.25% copper, containing approximately 101,000 tonnes of copper metal. The company’s updated feasibility studies, filed with the Ministry of Mines and Energy in 2024, propose a phased restart beginning with Otjihase due to its easier access, intact infrastructure, and proximity to Windhoek.
Otjihase’s geology is classic volcanogenic massive sulphide (VMS), with lenses of sulphide ore sandwiched between metamorphosed volcanic layers. The host rocks are part of the Damara Orogenic Belt, formed over 500 million years ago during the collision of ancient continental plates. The deposit remains open at depth, and CCC geologists believe there are extensions yet to be explored through drilling.
As of 2025, Otjihase remains on care and maintenance, with CCC completing environmental audits, shaft inspections, and updated mine designs for future underground operations.
The company plans to utilise energy-efficient pumping and ventilation systems, powered in part by solar installations near Windhoek. Discussions are also underway to employ Namibian contractors for the rehabilitation phase, creating local jobs and ensuring compliance with Namibia’s local participation requirements.
Like Matchless, Otjihase carries layers of history that go beyond geology. Archival correspondence from the 1960s shows that Nama and Baster families from the Windhoek-Rehoboth corridor supplied the early workforce, building settlements that later evolved into the peri-urban communities east of the capital. Their contribution to the mine’s development — as builders, truck drivers, and smelter attendants — laid the foundation for Windhoek’s early industrial growth.
Today, the shafts of Otjihase are quiet, yet beneath them lies one of Namibia’s most enduring copper resources, a reminder of how the country’s capital grew in the shadow of the ore body that helped define its industrial identity.
As Namibia positions itself within the global energy transition, the eastern hills of Windhoek may once again echo with the sound of copper.
The metal that once left Otjihase by rail to Tsumeb could yet flow again — this time to power grids, electric vehicles, and the green technologies of the future.
