Watpac, Noble Consulting Surveyors and the DeGrussa Tailings Facility
Noble Consulting Surveyors were recently contracted by Watpac Civil & Mining to provide the Engineering Survey Services for the construction of the Tailings Storage Dam at the DeGrussa Copper –Gold mine, located 150km North of Meekatharra in Western Australia.
While the project is still a few weeks away from completion, we are pleased to announce that Watpac has once again found our service to be of benefit to their operations and we look forward to continuing our well established relationship in Western Australia by providing Engineering & Construction Surveys of the highest possible standard. When asked by our team on how he found our service Project Manager Mr Jake Preston said that he was “very happy with the results”, and the feedback from the rest of the team has been to a similar tune. Thanks to Matthew Clarke, Sandy Koch, Corin Heath and Mike Savage for being a pleasure to work with and your outstanding professionalism.
The task required of Noble Consulting Surveyors for this project was of a varied scope, from measuring the existing surface, amending design parameters, calculating quantities and providing as-constructed documents.
The project has been undertaken during the course of some of the most diverse environmental conditions found in the Mid-West Gascoyne region of Western Australia, ranging from extremes of heat, passing cyclonic systems and
lightning storms. The team from Watpac need to be commended for their skill in overcoming adverse circumstances and delivering the product to the client.
With regard to survey, upon first arrival to site, NCS were presented with the task of measuring the existing surface to see how the base material that had been previously prepared would fit in with design specifications. The TSF basin is an enormous circular figure, with the diameter being close to 500m and walls nearing 10m in height, in the middle of this was a huge clay stockpile consisting of hundreds of “truck dumps”, which NCS traversed and measured with significant detail. In temperatures climbing above 40°C, the survey of over 2000 points was completed by Noble Consulting Surveyors in a little less than 2 days, this is good progress by anyone’s standard.
After completing this initial survey, it was necessary to compare the results with the design drawings in order to report to Watpac what modifications to design parameters would be required to minimize cartage of materials. Both excess spoil out of, and imported materials into the dam.
Quantities of various materials were also calculated for the client for the purposes of logistics, costing and planning. Once these quantities had been provided, the team from Watpac assessed the results and requested some minor design alterations be made. NCS gladly obliged and final design parameters were finalized.
NCS then went about creating Digital models for use on the GPS machine control fitted to the Watpac machinery, these were uploaded to the earthmovers and production commenced. There were several separate surfaces required for construction of the basin, one each for stripping and key trenches, the clay lined walls and the clay lined floor. Each of these addressed a different element of construction, and with construction being completed without pegs in the ground it was critical that these models were accurate, clear and concise.
Our job on this stage of our adventure up north had been completed. Once construction of the clay surfaces was completed, NCS was required to pay another visit to site. This time we had the pleasure of completing the As-constructed survey.
The as-constructed survey for this project was similar to the initial pick up, or feature survey. The task itself required NCS to traverse the entire basin yet again measuring the surface levels and batters that had been constructed, a total walked distance near to 20km and another 1800 surveyed points to complete it. The weather was much milder this time, and the absence of the original clay stockpile made the task a great deal easier.
After completion of the data collection, the results of the As-constructed survey were plotted for the client, and then compared to the design surfaces. The result was a resounding success, with very little wastage of materials and a very satisfying degree of conformance to specifications. Overall, the team from Watpac had produced excellent results using the information captured, calculated and provided by Noble Consulting Surveyors.
It is with great pleasure that once more, NCS can humbly say that with another project completed, there is another satisfied client. Providing a service that meets and exceeds the requirements of our client is the driving force behind Noble Consulting Surveyors, and will always be our focal point. Please visit our services page to see some of the ways that Noble Consulting Surveyors can assist you on your next project or you could reach us on any of the avenues listed on our contact page.
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