A MAJOR MISHAP AT THE MILL

SUGAR BIN COLLAPSES

Fifty years ago, on Monday, November 3 1975, just after 3 pm, word raced through the town that the ninety foot, 3000 ton sugar bin at the Proserpine Sugar Mill (PSM) had collapsed. This shocking news was followed quickly by a wave of relief when residents learned that no one was injured in this disaster. By nightfall, thousands of sightseers, most armed with cameras, had inspected the damage. The disaster attracted media attention nationwide.

The sugar bin was the largest sugar storage container in the Australian industry apart from bulk terminals and represented an important step forward for the mill which was the most isolated of all mills in terms of proximity to bulk terminals. Designed and constructed by NQEA, it was commissioned for use at the start of the 1975 crushing, but until that fateful day had not been filled to anywhere near its capacity.

To make up for previous lost crushing time, the mill had continued through the weekend and by Monday morning the bin was nearing capacity for the first time. After lunch, Queensland Government Railway (QGR) sugar wagons were shunted into the rail sidings under the bin. Loading had just commenced when some startling noises were heard from the structure. Workmen loading sugar from the huge hopper received a warning when bolts began to fly apart like pistol shots. They immediately fled from the site and the area was evacuated as the gigantic bin began to buckle and crumple downwards. It was estimated that from the first snapping of the bolts and buckling, ten minutes elapsed before the collapse was complete. Fortunately, the bin fell towards the river otherwise it would have been extremely difficult to construct the temporary facilities which allowed crushing to recommence the very next day.

What followed was a marathon effort by all. Within an hour, salvage work had commenced. Mill employees worked throughout the night construct facilities to load sugar to rail - some being on duty for more than 24 hours. The tramway department laid rails around the collapse to rejoin the existing siding. Fitters, boilermakers, electricians, and trades assistants built a ramp and small hopper to load the rail wagons and diverted and constructed belt conveyors and bunkers within the mill. The two mobile cranes were unable to keep pace with requirements and as a result, a lot of the material had to be moved by hand – even large heavy steel girders some fifteen metres long were man handled from the backyard into the mill. These were placed on their side and supported to allow end loaders carrying sugar from a bunker inside the mill to be driven up to a small loading hopper erected over the boxes on QGR sugar wagons.

Plant operators from the mill and the Proserpine Shire Council performed this non-stop and extremely arduous task for several weeks until a vessel intended to be the new mud and fly ash bin was erected with its own conveyor system. Thanks to the steady and capable action of mill officials and workers, almost all of the sugar from the collapsed bin was reclaimed. Thankfully, too, the weather remained fine. The spilt sugar was open to the elements and rain would have been a calamity.

A new bin was commissioned and built. None of the steel work from the original structure could be used in this new bin as every component was distorted. The new bin was put into service twelve months later in November 1976 and is still in use today.

Story and photo courtesy Proserpine Historical Museum. Information also sourced from Frank Doolan (PSM Engineer 1978 - 1990) and “Proserpine Guardian”.

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A collapsed sugar bin engulfed two rakes of rail wagons. Photo supplied.

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