We successfully installed OPGW on over 300 towers near Bathurst, NSW for Transgrid.
This involved stringing OPGW on TL72 330kV/132kV Tower Line of 67 Structures, and the Installation of OPGW on TL949 132kV Pole Line of 270 Structures including Earth peak upgrades.
This project faced a few challenges such as difficult terrain and bad weather which caused significant delays and disruption to the program. To combat this, alternative sections were prepared in advance to allow for quick access to out of order sequence when required. We also proposed an Accelerated program with additional plant and resources to maximise efficiency and maintain cost.
Key Challenges:
Stringing OPGW on TL72 330kV/132kV Tower Line of 67 Structures
Installation of OPGW on TL949 132kV Pole Line of 270 Structures including Earth peak upgrades
The scope of the Vales Point project was Tower Refurbishment on the Vales Point to Lake Munmorah 330kv Transmission Line for Transgrid.
This project involved the assessment of 11 Transmission Towers and then doing Bolt replacements, surface preparation and paint application to refurbish those towers.
Due to the nature of tower refurbishment, there was significant consideration put into the protection of the surrounding environment from lingering spray from the blasting unit. We looked at the weather conditions multiple times daily, changed our blasting units to the Torbo brand and worked with the most environmentally friendly products for the blasting and painting of towers making sure to use water-based environmental controls.
The Boggabri 11kV relocation project was an expansion project for the Boggabri Coal Mine. Completed under very strict mining rules this project was undertaken to expand the mine’s capacity of coal from 1.6Mtpa to 6.5Mtpa. This involved the upgrading, relocating, and building of new power lines.
This project included a new 132kV Transmission line expanded mine infrastructure and supply, construct, testing and commissioning of approximately 8km of 11kv overhead lines and associated underground lines.
The Dubbo to Narromine project was a 132kV Overhead Transmission Line construction project between Dubbo West Zone Substation and Narromine, where the existing 66kV feeder (designation 808N) from Dubbo West Zone Substation to Narromine was upgraded to 132kV by removing the old line and replacing it with the new construction in the same easement.
The works included 29 kilometres of dismantling and removing existing 66kV line infrastructure, and then the rebuild of the existing 66kV Transmission Line to a 132kV Overhead Transmission line. This included the installation of approximately 120 concrete poles. This involved a lot of hurdles to protect existing power lines and needed to be put up under outage conditions.
This project included road crossings and crossings over existing powerline feeders, as well as many heritage areas, all of which were successfully negotiated and any obstacles were crossed without incident.
This project was successfully completed delivered to specification and within time constraints.
Key Challenges:
29 kms of dismantling and removing existing 66kV line infrastructure
Rebuild of existing 66kV Transmission Line to a 132kV Overhead Transmission line and construction of 120 concrete poles
Road crossings over existing powerline feeders, as well as many heritage areas
The scope of this project is to install OHEW, OPGW conductor and replace Insulators near Dapto, NSW.
The Works on this project Include TL10 and TL11 330kV Twin Conductor Insulator Replacement on 36 Strain Towers, TL11 OHEW Replacement from Str. 0 Dapto Substation to Sydney South Substation Str. 156, incl. Earth Peak upgrades and TL10 OHEW and OPGW from Str. 2 Dapto Substation to Str. 26 West of Dombarton Substation, incl. Earth Peak upgrades.
On this project, we have had to design new earth peak OHEW/ OPGW brackets with 2 attachment points for maintenance purposes.
We have also designed and engineered rated insulator lifting cradles with single point lift at 500kg SWL.
The 132kV Yass to Wagga Line Upgrade project was to replace the existing wooden H 132kV structures with new concrete monopole structures, replace the old 115km Banana conductor with a new Lemon conductor.
The activities for the project were to demolish and rebuild the existing power line, to the new standards. To do this we needed to assess the access routes and roads to each structure location, building roads and pads to facilitate the upgrade works. It included stakeholder engagement and liaising with landowners to access their properties.
The terrain from Yass to Wagga Wagga is mountainous and the route included ranges that had to be crossed. This meant building pads and accessing site with large construction plant was difficult at certain locations.
Key Challenges:
Dismantling and removing existing wooden poles and replacing with new concrete monopoles
Silverton Wind Farm in NSW comprises of 200MW (58 wind turbines) of energy into the network at Broken Hill. It was developed by AGL and constructed in 2018.
The power generated by this wind farm connects to the Transgrid 220kV network (Broken Hill) which is 25km from the wind farm substation.
CPP designed and constructed the 220kV substation and constructed the transmission line required to connect the wind farm to the TransGrid network.
KEY CHALLENGES
The project has presented a considerable challenge with hard rock being found in most foundation locations. This has required us to redesign and certify foundations at short notice and use a variety of means to excavate foundations.
The remote location of this project has presented challenges in terms of logistic support. This led to the development of plans that considered the long lead times to deliver items as well as the capacity limitations of local suppliers.
Powerline Design and Review
Clearing and Access Track Preparation
25km of 220kV Transmission Line Construction on steel monopole structures
Our team completed the Richlands to Sumner Tee Transmission Line Refit for Powerlink in five months. This involved undertaking the refurbishment of 15 x 110kV Double Circuit Lattice Steel Transmission Line Towers for Powerlink in the Brisbane Western Suburbs, QLD.
The project scope included minor clearing and earthworks, the installation of ground earthing systems, strengthening of foundations, design and replacement of steel members and bolts, installation of anti-climb devices and signage, surface preparation and painting of the tower, and removal of previously applied hazardous paints (including asbestos infused and lead-based) including disposal.
The tower locations had a variety of challenges including; located within the rail corridor, located within busy highway median, located adjacent to residential homes and commercial businesses. Our environmental strategy included property owner liaison, weed management, soil water management and monitoring of compliance with the project environmental plan.
Planning of the works required significant planning and consultation of a large group of stakeholders.
This work was delivered to the satisfaction of Powerlink Queensland with no environmental incidents, no quality non-conformances and no lost-time injuries.
Key Challenges:
Environmental management
Minor clearing and earthworks
Ground earthing systems
Refurbishment: strengthening of foundations, design and replacement of steel members and bolts, installation of anti-climb devices and signage, surface preparation and painting of the tower, and removal of previously applied hazardous paints (including asbestos infused and lead-based) including disposal.
Bodangora Wind Farm near Wellington, NSW comprises of 113MW (33 wind turbines) developed by Infigen Energy. The power generated by this wind farm connects to the Transgrid 132kV network via the Wellington to Beryl Transmission line and the Wind Farm Substation.
CPP designed and constructed the 33/132kV substation and delivered the line construction work, required to connect the wind farm to the Transgrid network.
KEY CHALLENGES
The project has presented considerable challenge with hard rock being found in most foundation locations. This has required us to redesign and certify foundations at short notice and use a variety of means to excavate foundations.
The remote location of this project has presented challenges in terms of logistic support. This led to the development of plans that considered the long lead times to deliver items as well as the capacity limitations of local suppliers.
Clearing and Access Track Preparation
8km of 132kV Transmission Line Construction on concrete structures
