E n g i n E E r i n g Wo r k s o f t h E g u n d i t j m a r a at L a k E C o n da h ( ta E r a k ) a n d t y r E n da r r a nomination undEr hEritagE rECognition Program of EnginEEring hEritagE austraLia Prepared for Engineering heritage australia (newcastle) nomination under heritage recognition Program of Engineering heritage australia Cover photo: the south–western corner of Lake Condah where most of the structures are located following the floods of 2010/2011 1 EnginEEring Works of thE gunditjmara at LakE Condah (taE rak) and tyrEndarra nomination undEr hEritagE rECognition Program of EnginEEring hEritagE austraLia 1 IntroductIon this proposal has been prepared by Bill jordan (Engineering heritage australia (newcastle) and members of gunditj mirring traditional owners aboriginal Corporation. for the first charter of the institution of civil engineers in 1828, thomas tredgold provided the definition “… the profession of a civil engineer, being the art of directing the great sources of power in nature for the use and convenience of man.” Well before the formation of the institution of Civil Engineers and similar bodies in the 19th century and before any thought was given to a formal technical education for engineers, many examples of works conforming to that definition of civil engineering had been built over many centuries: these ranged from roman aqueducts and mesopotamian irrigation works to the early European canal builders of the 18th century. it is useful to keep the above definition in mind as it distinguishes works of civil engineering from those purely intended to provide shelter, although in many cases the two are inextricably mixed. 1.1 Background the history of the aborigines of the western district of Victoria and details of the settlements they lived in prior to European settlement, whilst it is at times an interesting story, adding to the total cultural significance of the place, it has only passing relevance to this nomination, suffice it to say that few attempts were made by settlers, the colonial government and the state government, right up until the 1960s, to understand or preserve the culture which existed previously. it has only been since the 1970s that a serious attempt has been made to recognize the culture and investigate its scope. Burnum Burnum has written1 “…the traditional aboriginal economy was much more complex and varied than most textbooks have described it, some white explorers and early administrators described villages of finely constructed huts, methods of harvesting and storing grass seeds to prolong the season by many months, as well as complicated fish and game traps. some of the fish traps, as at Brewarrina, still exist, though damaged by time and vandals. in Victoria, a vast network of canals and ponds, which brought eels across a mountain range to be stored and harvested at will, has been discovered and partly excavated, gradually it is dawning on the outside world that life in the traditional aboriginal way involved a great deal of knowledge and skill.” in the definitive monograph published in 1978 , Coutts et al2 suggest that “…by the time Europeans arrived in western Victoria the aboriginal inhabitants of the region had developed a diverse technologically-oriented economy, the Lake Condah structures provide further evidence for specialised and large-scale technological adaptation in the district …”. the structures at and near Lake Condah “comprise the remains of semi-circular stone-walled houses, cairns, free standing rock walls, stone-walled channels, and fish-traps and canals excavated into fractured and weathered basalt”. as further mentioned by Coutts, “nor were they all small structures – some were more than 450 m long, greater than 0.5 m deep and around 0.5 m wide”; it is also mentioned that dawson in 18813 described the construction of races and channels with clay embankments 0.6 – 1 m high and 250 – 300 m long. it is these structures which led to an assessment of the whole infrastructure and led to this nomination for recognition as engineering heritage. 1 Burnum Burnum’s Aboriginal Australia - A Traveller’s Guide, edited David Stewart, Angus & Robertson,1988. 2 Aboriginal Engineers of the Western District, Victoria, Coutts PFJ, Frank RK & Hughes P, Records of the Victorian Archaeological Survey, Number 7, June 1978 3 Australian Aborigines: the languages and customs of several tribes of Aborigines in the Western District of Victoria, Australia, George Robertson, Melbourne, 1881 April 2011 Lake Condah and Tyrendarra Nomination for Engineering Heritage Recognition 2 p a m y alit oc L 1: e r u g Fi Lake Condah and Tyrendarra April 2011 Nomination for Engineering Heritage Recognition 3 Figure 2: A recent aerial photo of a section of Lake Condah, filled by the 2010/11 floods. The sites of two traps are indicated by arrow and the path of a channel is marked. Different systems are found relating to different water levels. Figure 3: A dam is shown by red arrow and a trap by yellow arrow. Figure 4: Photo taken in 2001 when Lake Condah was dry showing a weir built to form a pond with an opening for a fish trap. April 2011 Lake Condah and Tyrendarra Nomination for Engineering Heritage Recognition 4 Figure 5: The first accurate mapping of the works at Lake Condah, drawn by surveyor Alexander Ingram in 1893 from observations made in 1883 in preparation for the first drainage scheme for Condah Swamp. The background and authenticity of this map are discussed in the paper “A Late-Nineteenth-Century Map of an Australian Aboriginal Fishery at Lake Condah” by Thomas Richards, Programme for Australian Indigenous Archaeology. School of Geography and Environmental Science, Monash University, Clayton, Victoria 3800, Australia and Aboriginal Affairs Victoria, Department for Victorian Communities, Melbourne, Victoria 3001, prepared for publication as part of a PhD thesis. Lake Condah and Tyrendarra April 2011 Nomination for Engineering Heritage Recognition 5 Figure 6: Photo, also taken in 2001, showing the remains of a channel at one of the higher levels which took water, an d fish, from the lake in the background to a reservoir behind the photographer. Figure 7: Remains of another channel (from 2001) with the ranger standing at the mouth of the fish trap. fish traps are known from throughout australia. the big difference at Lake Condah and tyrendarra in western Victoria, which involved what we would call engineering, is that dams, stone races and canals were built to manipulate the water levels in the various basins of the lake and divert water from the creek at tyrendarra into the engineered trap system. Coutts defines stone races as “above-ground structures for directing water” and canals as “channels dug into the ground”, though observations on site suggest a blurring of this distinction. stone races appear to have been built to force fish (mainly eels) into fish traps as lake waters rose or fell. Canals appear to have been formed to force water into various basins of the lake where natural flows were not reaching: in some cases it appears that these artificially filled basins were used as holding ponds to keep fish fresh until they were needed. stone walls also appear to have been used to artificially define ponds. the different systems of channels, races and ponds in Lake Condah were used at different lake levels, with transfer of activities from one to another as the lake level changed with seasons. at tyrendarra the single system was associated with darlot Creek and could be described as an off–stream facility into which the water of darlot Creek was diverted as required by a stone weir. fish were caught in traditional woven traps placed in the channels, either supported by stone structures for single traps or by timber palisade–like structures across wider channels holding multiple traps. April 2011 Lake Condah and Tyrendarra Nomination for Engineering Heritage Recognition 6 Figure 8: Darlot Creek runs through Lake Condah and joins the Fitzroy River just before its mouth in the Southern Ocean. The creek had a dam upstream of this location (away from photographer) from which water was diverted into the Tyrendarra trap system in the land to the left. in the only known instance in australia, the gunditjmara built stone and wattle–and–daub type huts for permanent settlement. Eels (mainly) and other fish were smoked in “smoking trees” and traded as well as being stored and consumed locally. Figure 9: A smoking tree remaining near Lake Condah the most recent description of the area and the aquaculture enterprise is contained in the 2010 book “the people of Budj Bim”, a copy of which is available in conjunction with this nomination. this book gives good illustrations of the complex building forms found in the villages with groups of interconnecting circular stone houses for family groups. 1.2 Present Situation Lake Condah was drained for grazing, starting in the 19th century with more “successful” and extensive work being undertaken in the early 20th century. until recently, water could only be seen in the channel systems during very high floods. figure 10 taken from the paper by Coutts et al, shows the operation of one of the channels during such a period. Lake Condah and Tyrendarra April 2011 Nomination for Engineering Heritage Recognition 7 Figure 10: This picture, taken from the referenced paper by Coutts, shows the beginnings of the understanding of the system at lake Condah in the 1970s. in recent years there has been a significant change in the circumstances at Lake Condah and surrounding areas. native title has been granted to the community and archaeological investigations have begun again under a continuing Figure 11: At Tyrendarra, an interpretation track has been established with descriptive signposting such as this at the remains of a weir and trap location. Figure 12: At Tyrendarra, there are also reconstructions of earlier structures such as this timber palisade placed in a wide channel and holding a number of fish traps April 2011 Lake Condah and Tyrendarra Nomination for Engineering Heritage Recognition 8 program led by dr ian mcniven of monash university. in 2006 a new weir was built to block the European–constructed drainage channel. at the time of preparing this nomination, water (with eels) has been restored to the Lake Condah system and investigations are continuing to map and date the various parts of a very complex system. of particular significance is that the two sites at Lake Condah and tyrendarra have been included on the national heritage List. Lake Condah and Tyrendarra April 2011 Nomination for Engineering Heritage Recognition