Cocks Pioneer Gold & Tin Mines NL sluicing works, open cut hydraulic mine. Cocks Pioneer Electric Gold & Tin Mine Company was formed in 1899. The company's first power station, located at the eastern end of the valley began operating with its 340 Kilowatt steam-powered generator. By 1909, from 2,500,000 cubic yards worked, reported recovery was 17,284 ounces of gold and 224 tons of tin ore. By 1909, Cocks Pioneer’s power plant had become inadequate and uneconomical. The barge was floated downstream about a mile, but lost time caused the operations to cease. Following testing, a new mine was established by diverting Reid's Creek at a cost of £25,000. Settling dams were built, one of which held 1,935,900 cubic feet. Sold earth banks, built against a wall of stringy bark saplings constructed and laced with vertical props, were built. In 1914, the company was reformed as Cock’s Pioneer Gold and Tin Mines NL, another power station was constructed at the western end of the township, near the junction of Clear and Reid's Creeks. From 6,800,000 cubic yards of material processed, the returns were 64,397 ounces of gold and 855 ton of tin. Cocks Pioneer mine then moved the barge downs stream and continued sluicing. In 1929 Cocks Pioneer Electric Gold and Tin Mining Company ceased operations due to a drop in values. Cock’s Pioneer Gold and Tin Mines NL carried on large-scale hydraulic sluicing operations until 1941. mines, mining, gold, tin, gold mining, tin mining, sluicing, men, cocks pioneer, el dorado, eldorado

Diamond Creek Bridge (Bridge Street Bridge) Downstream cylinder pier No. 1 showing concrete slurry and rock fault. Paul Krafeznk 27th July 1956Record of various Shire of Eltham infrastructure works undertaken during the period of 1952-1962 involving bridge and road reconstruction projects, sometimes with Eltham Shire Council Project Reference numbers quoted. It was during this period that a number of significant improvements were made to roads and new bridges constructed within the shire that remain in place as of present day (2022). In many situations, the photos provide a tangible visible record of infrastructure that existed throughout the early days of the Shire. The album was put together by or under the direction of the Shire Engineer, J.A. McDonald.infrastructure, road construction, shire of eltham, bridge construction, bridge street bridge, eltham, eltham-greensborough road, 1956-07-26, paul krafeznk

Taken between circa 1920 - 1950 this photograph depicts the open mine in the Three Mile Mine at Barramutha. The mine was an important gold resource and was typically mined using a method known as hydraulic sluicing whereby high powered water jets are used to dislodge rock or move sediment. The remaining water sediment slurry is directed through sluice boxes to remove the gold. The Beechworth mining district was one of six mining districts established by the governor-in-council on 4th of January 1858 under the provisions of An Act for Amending the Laws Relating to the Goldfields (21 Vic no. 32).This photograph shows cultural and research value into the historical methods of hydraulic sluicing in the Beechworth mining disctrict. It also shows the evolution of the mining methods and has potential for understanding future engineering endeavors in the context of victorian mine goldfields.Black and White rectangular photograph printed on matte photographic paper.Reverse: Copied from original on loan from Webb (QLD)/ Donated Nov 2009/ Barnawatha Three Mile Mine c1920-1950 Minehead & Slicing/ Managed by John Weir, Peter Jensen, Jack Cox/ Owned by/ the Plain Bros then Parkinsons/ John worked for Pqarkinsons. three mile creek, three mile goldfields, three mile beechworth, goldfields, #beechworth, hydraulic mining, hydraulic sluice, burke museum

Taken between circa 1920 - 1950 this photograph depicts a man dressed in dark trousers, a white long sleeved shirt and broad-brimmed workers hat digging around in the Three Mile Mine at Barramutha. The mine was an important gold resource and was typically mined using a method known as hydraulic sluicing whereby high powered water jets are used to dislodge rock or move sediment. The remaining water sediment slurry is directed through sluice boxes to remove the gold. The Beechworth mining district was one of six mining districts established by the governor-in-council on 4th of January 1858 under the provisions of An Act for Amending the Laws Relating to the Goldfields (21 Vic no. 32). This photograph shows historic and research value into the historical methods of hydraulic sluicing in the Beechworth mining disctrict. It also shows the evolution of the mining methods and has potential for understanding future engineering endeavors in the context of victorian mine goldfields. Black and white rectangular photograph printed on matte photographic paper.Reverse: 7597.3/ Copied from original on loan from Webb (QLD)/ Donated Nov 2009/ Barnawatha Three Mile Mine 1920-1950/ Owned by Plain Bros then Parkinsons/ Managed by John Weir, Peter Jenson, Jack Cox/ Slicing. three mile creek, three mile goldfields, three mile beechworth, goldfields, #beechworth, hydraulic mining, hydraulic sluice, burke museum

Taken between circa 1920 - 1930 this photograph depicts a Hydraulic water jet in the foreground and a man dressed in dark trousers, a white long sleeved shirt and broad-brimmed workers hat digging around in the Three Mile Mine at Barramutha. The mine was an important gold resource and was typically mined using a method known as hydraulic sluicing whereby high powered water jets are used to dislodge rock or move sediment. The remaining water sediment slurry is directed through sluice boxes to remove the gold. The Beechworth mining district was one of six mining districts established by the governor-in-council on 4th of January 1858 under the provisions of An Act for Amending the Laws Relating to the Goldfields (21 Vic no. 32).This photograph shows cultural and research value into the historical methods of hydraulic sluicing in the Beechworth mining disctrict. It also shows the evolution of the mining methods and has potential for understanding future engineering endeavors in the context of victorian mine goldfields.Black and White rectangular photograph printed on matte photographic paper. Reverse: Copied from original on loan from Webb (QLD)/ Donated Nov 2009/ Barnawatha Three Mile Mine c1920-1950/ Owned by Plain Bros then Parkinsons/ Managed by John Weir, Peter Jenson, Jack Cox/ Slicing. three mile creek, three mile goldfields, three mile beechworth, goldfields, #beechworth, hydraulic mining, hydraulic sluice, burke museum

This photo shows the large mining cavity with a hydraulic sluicing machine in operation at Baarmutha Three Mile Mine, Beechworth . The Beechworth Mining District was one of six mining districts established by the Governor-in-Council on 4 January 1858 under the provisions of An Act for Amending the Laws Relating to the Goldfields (21 Vic no.32). The District was further divided into seven divisions: Spring Creek, Snake Valley, Three Mile Creek, Buckland, Woolshed, Yackandandah and Omeo. The boundaries of each of these divisions and of the whole district are described in the Governor-in-Council's proclamation printed in the Government Gazette, 5 January 1858, pages 3-5. Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment. In the placer mining of gold or tin, the resulting water-sediment slurry is directed through sluice boxes to remove the gold. It is also used in mining kaolin and coal.This photograph shows the impact the gold rush era had on Australia and the earth.A black and white rectangular photograph printed on photographic paperCopied from original on loan film (WEBB QLD) / Donated 2009 NOV/ Baarmutha Three Mile Mine c1920-1950/ Managed by John Weir Peter Jereen Jack Cox / Owned by Plain Bros then Parkinsons Sluicing.mining, gold fields, beechworth, gold rush, burke museum, photograph, mining cavity, hydraulic mining, hydraulic sluicing, baarmutha

This image shows the approach to Beechworth from the south-west via the Newtown Bridge. Numerous early buildings line the road as it bifurcates to become Ford and High Streets on the ridge above Spring Creek and Newtown Falls. The sloping, rocky terrain and water course along the gorge show evidence of the intense mining activity that occurred at the site. The Ovens Gold Rush at Beechworth started when gold was found at Spring Creek in February 1852, prompting an influx of miners from around the world. The population grew over 20,000 by 1857. While the earliest mining at Beechworth was similar to that in other Victorian goldfields like Ballarat and Bendigo, Beechworth is notable for its use of hydraulic sluicing as a major method of removing wash-dirt. Hydraulic sluicing employs high pressure jets of water to blast away large areas of earth and wash it down to be run through a sluice box. Gold gets caught in the sluice and the remaining slurry is washed away. This method of mining is extremely effective but causes significant environmental impacts and damage to waterways. Large water quantities were required for large-scale sluicing, and the long water races and deep tailraces that were constructed in the Beechworth area in the nineteenth century are nonetheless considered feats of engineering. The site in the photograph is associated with the Rocky Mountain Mining Company who constructed an eight hundred meter tunnel under the township between 1876-1880 to reduce water levels at Spring Creek, which had been subject to diversions since the earliest days of alluvial mining. Over four million ounces of gold (115 tones) were found at Beechworth between 1852 and 1868, and the wealth from the gold rushes built Beechworth and the nationally significant buildings that remain standing today.This image shows the early development of the Beechworth township above Spring Creek, where gold was discovered in 1852. Evidence of hydraulic sluicing, a uniquely predominant method at Beechworth, and water-works engineering are present in the landscape. By the 1870s, alluvial gold deposits were depleted and increasingly complex engineering was required so deeper shafts could reach bedrock. This image is significant for understanding changes to the landscape and the evolution of mining methods and engineering practices related to the extensive construction, manipulation and management of water networks. The shift from smaller scale alluvial mining to larger company dominance in the mining industry has implications for understanding wider social, economic, political and industrial changes in the region of Beechworth and within the context of the Victorian Gold Rush more broadly. A black and white rectangular reproduction photograph printed on photographic paper. burke museum, beechworth museum, beechworth, gold fields, gold rush, victorian gold rush, hydraulic sluicing, rocky mountain mining company, spring creek, netwown falls, mining tunnels, water races, tailraces, colonial australia, australian gold rushes, mining technology, beechworth historic district, indigo gold trail, migration, indigo shire, gold mining, gold mining history

This image taken between 1920-1930 depicts open-cut hydraulic sluicing at the Three Mile Mine, located about five kilometres south of Beechworth. Alluvial, or surface, mining began on this site in the 1850s, but was soon replaced by hydraulic sluicing methods. By the start of 1880 it is estimated that nine hundred miles of water races had been cut though soil and rock in the Beechworth district. Hydraulic sluicing employs high pressure jets of water to blast away large areas of earth and wash it down to be run through a sluice box. Gold gets caught in the sluice and the remaining slurry is washed away. Large water quantities were required for hydraulic sluicing, and the long water races and deep tailraces that were constructed were considered great engineering feats. This method of mining is extremely effective, but causes significant environmental damage and impacts to waterways and agricultural operations. Miners at Beechworth built extensive networks of races and dams to secure reliable supplies of water on a scale far greater than elsewhere in Victoria. By the 1880s Beechworth's water barons continued to hold more than half of all the water right licences on issue and undertook sluicing operations on a massive scale. The manipulation of surface and ground water via race networks was well planned and recorded in detail by local mining surveyors. The maps that were created, combined with modern geo-spatial technologies, provide a vital key in understanding the great lengths to which miners went to capture and control critical water resources. Today, Three Mile mine is called Baarmutha. The Three Mile Mine was unproductive until 1865 when John Pund and three other miners secured a fifteen year license and constructed a water race from Upper Nine Mile Creek to Three Mile Creek. In the early twentieth century Pund & Co. averaged over one thousand ounces of gold per year from the mine. After Pund's death in 1915, GSG Amalgamated Co operated the site, continuing sluicing until 1950. This image of hydraulic sluicing methods shows the extent of water-works engineering in the landscape. This photograph has historic and research potential for understanding changes to the landscape, the evolution of mining methods, and the extensive construction, manipulation and management of water networks in the Beechworth district. Black and white rectangular photograph on matte paperReverse: 7597-1 / Sluice Mining / Copied from original on loan from Webb (Qld) / Donated Nov 2009 / Baarmutha Three Mile Mine c1920-1950 / Managed by the Plain Bros then Parkinsons / Current Location is: Beechworth Animal Shelter / used for Baarmuthaburke museum, beechworth museum, beechworth, gold fields, gold rush, victorian gold rush, hydraulic sluicing, spring creek, netwown falls, mining tunnels, water races, tailraces, gold ming history, colonial australia, australian gold rushes, mining technology, beechworth historic district, indigo gold trail, indigo shire, john pund, water manipulation, water engineering, three mile creek, three mile mine, water race, large-scale mining methods, historical mining construction, alluvial mining, mining environmental impacts, baarmutha, water barons

Wooden model of a cyanide plant. A cyanide plant was used for dissolving gold from finely divided ores by means of dilute solutions of sodium or potassium cyanides. The model has five metal bins, there is some rust on the bins and scorch mark on the wooden base.mining, equipment, cyanide plant, gold cyanidation (also known as the cyanide process or the macarthur-forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. it is the most commonly used leaching process for gold extraction. the ore is comminuted using grinding machinery. depending on the ore, it is sometimes further concentrated by froth flotation or by centrifugal (gravity) concentration. water is added to produce a slurry or pulp. the basic ore slurry can be combined with a solution of sodium cyanide or potassium cyanide, however many operations utilize calcium cyanide, which is more cost effective. to prevent the creation of toxic hydrogen cyanide during processing, slaked lime (calcium hydroxide) or soda (sodium hydroxide) is added to the extracting solution to ensure that the acidity during cyanidation is maintained over ph 10.5 - strongly basic. lead nitrate can improve gold leaching speed and quantity recovered, particularly in processing partially oxidized ores.

Cast iron mercury bucket, used to hold mercury, potentially in the process of recovering minute pieces of gold mixed in soil and sediments. See research page for description of one process of using mercury to extract gold.gold mines, mining equipment, mercury bucket, miners used mercury in a number of ways to amalgamate gold, with each mill or battery operator having their preferred method depending on the nature of the ore. by the late 1850s the most common way of crushing goldbearing quartz ores or consolidated alluvial cements was in a stamp battery. the battery featured heavy iron stamp heads held in a frame, with each head often weighing up to 500 pounds (226 kg) or more (see msv 1880, page 45) (birrell 2005). stamp heads were lifted and dropped by a rotating overhead cam shaft driven by a steam engine or water wheel. ore was fed into a large cast-iron battery box, mixed with a steady stream of water, and pulverised by the stamp heads. in some batteries, mercury was placed in the base of the boxes to amalgamate with freed gold. the violent agitation of the mercury in the mortar box, however, could cause the mercury to break into myriad tiny globules that were carried away by the water with the tailings, thus losing a certain amount of gold in the process (thompson 1867; ritchie & hooker 1997). the water and sand slurry was splashed by the falling stamps from the box through fine mesh screens and onto inclined wooden tables below the mortar box (figure 2). the tables were covered with copper sheets or plates coated with mercury, which caught and amalgamated with a portion of the gold. the grey putty-like amalgam was periodically scraped off the sheets and retorted in a furnace to collect the gold and recover the mercury for reuse. mercury was inevitably lost from the plates, while poor maintenance resulted in further losses of gold and mercury in the tailings. mercury use and loss from gold mining in 19th century victoria. peter davies1, susan lawrence, and jodi turnbull, department of archaeology and history, la trobe university.