Isis Central Mill

Isis Central Mill
Isis Central Mill. Early 1990's. Unknown author.
Location
Coordinates	25.19471° S, 152.20780° E
State	Queensland
Region	Southern Region
LGA	Bundaberg Regional Council
Details
Established	1897 (129 years ago)
Owner	Isis Sugar
Gauge	610 mm (2 ft)
Annual Crush	1,250,000 tonnes season average

Isis Central Sugar Mill

Isis Central Sugar Mill is a raw sugar factory located in the locality of Isis Central, approximately 8 kilometres northwest of Childers, Queensland. Established in 1897, it is the only remaining sugar mill in the Childers district and one of the few remaining locally-owned milling cooperatives in Australia (Isis Central Sugar Mill Company Limited). The mill processes cane from the Childers, Cordalba, and Coringa districts, and recently expanded its supply area to include the Maryborough region.

Origins and Establishment

The development of the Isis Central Mill was driven by local cane growers who were dissatisfied with the prices offered by the Colonial Sugar Refining Company (CSR), which operated the nearby Childers Mill. In 1896, growers formed the Isis Central Sugar Mill Company Limited and utilised the Queensland Government's Sugar Works Guarantee Act 1893 to secure funding for their own facility.

Construction began on a site chosen for its proximity to the Isis Scrub cane lands and water supply. The mill commenced its first crushing season in 1897. It was an immediate success, fostering a strong cooperative spirit among the local farming community that persists to this day.

Expansion and Consolidation

Throughout the early 20th century, the Isis district was serviced by several smaller mills, including CSR's Childers Mill, Goodwood Mill, and Doolbi Mill. Over time, Isis Central expanded its capacity and efficiency, gradually becoming the dominant processor in the region.

• 1932: The mill became fully grower-owned after the government debt was repaid.
• 1933: CSR closed the Childers Mill, and its cane supply was transferred to Isis Central, significantly boosting the cooperative's throughput.

Modern Era

The mill has continued to modernise to remain competitive in the global market.

• Network Expansion: In 2012, the company completed a major railway extension to the Wallaville district, allowing it to compete for cane that was previously crushed by Bundaberg Sugar's Bingera Mill.
• Maryborough Expansion (2020): Following the closure of MSF Sugar's Maryborough Mill in 2020, Isis Central Sugar Mill secured the cane supply contracts for the Maryborough region. To facilitate this, the mill invested in logistics to transport cane from Maryborough to the Isis factory, effectively doubling its catchment area and securing its long-term viability.

Seasonal Crush

Isis Central is a high-capacity factory relative to its size.

• Average Crush: The mill typically processes between 1.1 million and 1.4 million tonnes of cane per season.
• Record: In the 2016 season, the mill crushed over 1.35 million tonnes. With the addition of the Maryborough cane, the mill targets a throughput of over 1.2 million tonnes annually, depending on seasonal rainfall.

Tramway Network

The mill operates an extensive 610 mm gauge tramway network of approximately 160 kilometres.

• Geography: The network traverses the steep and undulating terrain of the Isis Scrub, requiring high-powered locomotives.
• Fleet: The mill is renowned for its fleet of rebuilt DH diesel-hydraulic locomotives (originally ex-Queensland Rail) and Clyde locomotives. It features some of the heaviest grades in the Australian sugar industry, necessitating the use of "brake wagons" (weighted wagons) on cane trains to ensure safe braking on the steep descents.

Location

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Rollingstock

Name	Builder	Model	Serial	Year	Current Mill	Notes
D1	Walkers	GH500	602	1969	Isis Central Mill	Last rebuild by Isis - 1994
D2	Walkers	GH500	598	1968	Isis Central Mill	Rebuilt by Walkers - 1994
D3	Walkers	GH500	600	1968	Isis Central Mill	Rebuilt by Walkers - 1994
D4	Walkers	GH500	656	1970	Isis Central Mill	Rebuilt by Walkers - 1994
D5	Walkers	GH500	617	1969	Isis Central Mill	Rebuilt by Isis Mill - 1999
D6	Walkers	GH500	617	1969	Isis Central Mill	Rebuilt by Isis Mill - 2002
D9	Clyde Queensland	HG-3R	75-812	1975	Isis Central Mill	Stored. 2022.
D10	E.M. Baldwin	DH24B	7267-1-6-77	1977	Isis Central Mill	Navvy duties.
D11	E.M. Baldwin	DH28B	10130-1-6-82	1982	Isis Central Mill
1	John Fowler		20776	1935	Out of service	Unknown location
2	John Fowler		4110019	1950	Out of service	Unknown location
3	Clyde	DHI-71	55-66	1955	Out of service	Unknown location
4	Clyde	DHI-71	56-113	1956	Out of service	Unknown location
5	Clyde	DHI-71	58-191	1958	Out of service	Unknown location
6	Clyde	DHI-71	59-204	1959	Out of service	Unknown location
7	Clyde	DHI-71	61-220	1961	Out of service	Unknown location
8	Clyde	DHI-71	64-385	1964	Out of service	Unknown location
9	Stewart Sharp & Co		4619	1900	Out of service	Preserved 1979
Brake Van 1	Walkers	GH500	654	1970	Isis Central Mill	Converted by Isis Mill - 1995
D7	Walkers	GH500	TBA-4	2024	Isis Central Mill	Newly rebuilt 2025. No further information.