Engaged to assist in flood recovery efforts for a regional council area, we set out to clean debris from 9 x 825mm pipes, including their inlets and outlets. Services provided: Kaiser Water Recycling Unit to allow for continuous cleaning operations, despite there being no onsite water An excavator and tipper to remove excess debris Traffic […]
The project’s main goal was to conduct lateral lining installations within wastewater connections, a task requiring a high degree of expertise and precision. Our team met this challenge with remarkable proficiency, delivering outstanding results that surpassed expectations.
TDG was engaged for assessment and rectification of 4.5 kilometers of Stormwater conduit and maintenance holes, utilising CCTV inspections or physical traversing methods, followed by necessary rectification works.
TDG was engaged to pressure clean and record data from pressure drains at the base of the Dam wall and spillway. The drains provide important pressure release role in operation of the dam to mitigate destabilising pressure in the structure.
This project aimed to assess silt levels within a 2.4km, 1200mm ocean outfall from the primary wastewater treatment plant to the ocean discharge using a sonar-equipped, neutrally buoyant sub from the MSI toolkit. A specially trained 5-person crew traveled from Auckland to Timaru over two days for the inspection, as the outfall, initially inspected in […]
TDG delivered a comprehensive and organised solution to fulfill the client’s specified works scope, involving coordination with various contractors such as locators, traffic management, and surveyors, while navigating through multiple jurisdictions and permits including those from local government, Department of Transport, and resident notifications.
The client engaged TDG to carry out smoke testing as a proactive measure to identify and address leaks and defects in sewer systems. The local pump station for council has recorded more water going through then what is scheduled capacity. Through the implementation of smoke testing, TDG successfully pinpointed areas of concern within their sewer […]
The client engaged TDG to conduct an investigation into a pipeline connected to a drainage tank for a Community Centre, which experienced surcharge and flooding during heavy rainfall. Through CCTV investigation, we identified the pipeline obstruction caused by large tap roots and masses. Subsequently, TDG was tasked with restoring the pipeline to its full structural […]
The project in Wellington involved TDG Environmental using Multi-Sensor Inspections (MSI) to profile interceptor corrosion, resulting in the discovery of rapid degradation, demonstrated through a comparison report spanning 2013 to 2020, highlighting the need for ongoing inspections and leading to client satisfaction and pipeline relining.
TDG was tasked by the client to conduct comprehensive data collection within the project’s catchment area to evaluate network conditions and renewal needs. This involved employing various techniques, including CCTV inspections, laser profiling, and GPS surveying.
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Australia 1300 330 294
AU 1300 330 294 
info@tdg.com.au 
