Snowy Scheme, Blowering Dam and the making of modern industrial Tumut

A national project reaches the Tumut Valley

The Snowy Mountains Hydro-electric Scheme began officially in 1949 as one of postwar Australia’s largest public works projects. Its purpose was both national and regional: to generate hydro-electricity and divert water westward into the Murray and Murrumbidgee river systems for irrigation. For Tumut, this placed the town and its surrounding valley inside a vast network of dams, tunnels, power stations, roads and construction camps.

The wider Scheme was completed in 1974. Snowy Hydro records that more than 100,000 people from more than 30 countries worked on it during its construction. Many were migrants who had arrived from postwar Europe, although the surviving national figures do not show how many lived permanently in Tumut itself. What can be said with confidence is that the Snowy–Tumut Development brought an international workforce into the mountains east and south-east of the town, alongside Australian engineers, tradespeople, labourers and contractors.

Conditions on the Scheme could be severe. Workers were spread through regional townships and more than 100 temporary camps, some initially offering little more than tents and basic amenities. The work was also dangerous: Snowy Hydro commemorates 121 workers who died during construction across the entire Scheme. These national figures should not be treated as a count for the Tumut section alone, but they convey the human scale and cost of the undertaking.

Power stations beneath the mountains

The northern half of the Scheme became known as the Snowy–Tumut Development. Water was gathered and transferred through dams, tunnels and aqueducts before descending through a sequence of power stations towards the Tumut River system.

Tumut 1 Power Station was completed in 1959 and Tumut 2 in 1962. Both were built underground, making some of the district’s most important industrial structures largely invisible from the surface. Tumut 1 received water through works associated with Tumut Pond Dam and the Eucumbene–Tumut tunnel. Tumut 2 was supplied through a pressure tunnel more than 11 kilometres long.

Farther downstream, Blowering Power Station was completed in 1969. Tumut 3 Power Station followed at Talbingo in 1973. Tumut 3 was built as a pumped-hydro station, able not only to generate electricity but also to pump water back from Jounama Pondage to Talbingo Reservoir for reuse. Its completion gave the Tumut development a new role in meeting periods of high electricity demand, rather than simply producing a continuous flow of power.

Together, these works tied the Tumut district directly to the electricity systems of south-eastern Australia. The valley was no longer only an agricultural landscape and transport route. It had become part of a nationally significant machine for moving water and generating power.

Blowering Dam changes the lower valley

Blowering Dam was authorised in NSW legislation in 1951, although its final construction arrangements were shaped by later agreements between the State and the Snowy Mountains Hydro-electric Authority. The dam was completed in 1968, with its associated power station following in 1969.

The scale of the structure remains striking. Snowy Hydro lists Blowering as a 112.2-metre-high rockfill dam with a crest 807.7 metres long and a gross storage capacity of about 1.63 million megalitres. It was built across the Tumut River upstream of the town, receiving and regulating water emerging from the mountain system.

Its construction altered more than the river channel. The project required land acquisition, the relocation of services and the rebuilding of transport links. A 1966 Department of Main Roads account described a deviation of the Snowy Mountains Highway between Tumut and the foot of Talbingo Mountain, designed to avoid the waters to be impounded by Blowering and Jounama dams. Sections of the former valley route disappeared beneath the new storage, while the replacement road established the alignment through which later generations reached Talbingo and the high country.

Blowering also changed Tumut’s relationship with the river. The storage became part of the regulation of Snowy Scheme water moving into the Murrumbidgee system, while the lake and its foreshores developed a second life as a destination for boating, fishing, camping and water sports. That recreational identity became nationally visible through Ken Warby’s water-speed record runs on Blowering Dam in the 1970s, although that story deserves separate treatment and its own detailed sources.

The dam therefore mattered to Tumut in several overlapping ways: as infrastructure, as a reshaping of the valley landscape, as a regulator of river flows and as a new recreational landmark. These benefits were accompanied by lasting environmental questions about the condition and management of the Tumut River below the dam.

From construction centre to forestry town

The Snowy Scheme’s main construction phase could not provide permanent work at its earlier intensity. As projects were completed and workforces dispersed, Tumut’s economy continued to depend on agriculture and local services while developing a much stronger connection with plantation forestry, timber harvesting and wood processing.

By the end of the twentieth century, radiata pine plantations across the South West Slopes supported an industrial network of forest management, haulage, sawmilling and manufacturing. Tumut’s location near this timber resource made it a logical processing centre. The opening of the Visy Tumut Kraft Mill in 2001 marked a further step from harvesting and sawmilling into large-scale pulp and paper production.

The mill, situated between Tumut and Adelong, was designed to use plantation pulp logs and sawmill chips to produce kraft paper. Its feedstock linked it closely to other parts of the regional timber industry: material not suited to sawn timber, together with residues from sawmills, could become an industrial raw material rather than waste. Visy later expanded the operation, but the original 2001 mill already represented a major private industrial investment and a new source of direct and indirect employment.

Census figures help show the prominence of timber work, though they cannot measure the Snowy Scheme’s influence by themselves. In 2006, the Australian Bureau of Statistics recorded 5,925 people in the Tumut Urban Centre and Locality. Log sawmilling and timber dressing was the largest listed industry of employment, accounting for 6 per cent of employed residents, while forestry and logging accounted for another 4.6 per cent. Other wood-product manufacturing was also among the leading local industries.

By the 2021 Census, the same broad ABS geography recorded 6,518 residents. This modest increase should be interpreted cautiously because census boundaries and classifications can change, and population growth cannot be attributed to one project or industry. The figures nevertheless confirm that Tumut remained a substantial regional centre after the Snowy construction era. The 2021 count also included 508 Aboriginal and Torres Strait Islander residents, or 7.8 per cent of the recorded population.

The Dunns Road fire exposes an industrial vulnerability

The 2019–20 bushfire season revealed the risks created when much of a regional economy depends on a long-lived plantation resource. The Dunns Road fire burned through extensive forests and plantations across the South West Slopes, threatening communities and damaging timber that had taken decades to grow.

An official sustainable-yield review found that nearly 60 per cent of the harvestable area in the Tumut forestry sub-region experienced moderate-to-high-severity fire. The report said the effects were concentrated in the Bago–Maragle timber zone and attributed the sub-region’s recorded impacts to the Dunns Road fire. A separate Forestry Corporation annual report estimated that close to one-third of approximately 100,000 hectares of plantations around Tumut had been affected.

The immediate response included large-scale salvage harvesting. Fire-damaged logs had to be recovered before deterioration made them unusable, placing pressure on harvesting crews, processors, roads and storage areas. Visy reported using burnt wood to maintain mill operations while helping forest growers clear sites for replanting.

The fire demonstrated that Tumut’s industrial strength was also a point of exposure. The district had acquired major employers, specialised skills and nationally important production, but these depended on secure timber supplies, transport access and effective fire management across a very large plantation estate. The effects would extend well beyond the fire season because destroyed trees could not simply be replaced in the following year; plantation recovery would take decades.

The making of modern Tumut

Between 1949 and 2021, Tumut was reshaped by two connected forms of large-scale development. The Snowy Scheme brought dams, tunnels, power stations, road deviations and an international construction workforce into the district. Plantation forestry and the Visy Tumut Kraft Mill later gave the town an enduring manufacturing base after the great hydro-electric building program had ended.

Neither transformation erased Tumut’s older agricultural and commercial roles. Instead, they added new layers to them. By 2021, the town served farms, forests, factories, energy infrastructure and visitors to Blowering Dam and the mountains beyond.

Important details remain to be recovered from local records and personal collections: where particular Snowy workers lived, which Tumut businesses supplied the construction camps, how families experienced the workforce’s arrival and departure, and how landholders adjusted to the creation of Blowering Reservoir. Those local stories should be added when supported by council records, newspapers, photographs, oral histories or family documents. The documentary record already establishes the larger conclusion: the Snowy Scheme and the plantation economy made modern industrial Tumut, while also leaving the town closely dependent on the management of water, forests and fire.