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Project Client This work involved the laying of new storm water pipework and manholes and re-jigging the connection points to separate the storm water inflow from the process waste water systems. Other pipe work included cooling water lines and de-ionised water pipe work. Manholes, valve chambers, and metering chambers were also installed as part of the project. Two swale outlet drains with associated metering and valve points were included as part of the outfall work. The installation of a network of ducting to carry SCADA and fibre optic was done as part of the upgrade work. A new control building was also constructed as part of the work. |
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Project Client This project included the upgrade of the existing Linton effluent discharge point and the installation of an automated pump station within the army camp property. 1300m of DN200mm mPVC and 1000m of 225mm PE80 effluent pipeline was installed from Linton Army Camp to the Palmerston North City Council waste water treatment plant. A major part of the pipeline was the construction of a suspension span bridge to carry the effluent over the Manawatu River. This consisted of a two cable support for the pipeline from a deep rooted cylindrical tower on the Linton side of the river to a large free-standing A-frame structure on the other bank. A third cable spanning the river is utilized for the maintenance cable car. |
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Project Client This project involved renewing and reconfiguring the 150mm water main under the railway at North Street, Feilding and connecting into the existing reticulation either side. The pipe work installed consists of both PVC and MDPE with a steel pipe casing rammed under the railway line. New valves, fire hydrants and a RBX air valve in-ground chamber were also installed as part of this work. A new 300mm trunk sewer pipe was also installed under the railway parallel to the new water main. A new 300mm sewer trunk main was installed along Lethbridge Road for a distance of approximately 600m at a depth of 3-4m as part of this project. |
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Project Client Our Role Fulton Hogan carried out the roading work and Blackley Construction Ltd supplied and installed all underground services as part of the complete area wide upgrade. In addition to the power and telecom undergrounding, BCL was responsible for the supply and install of gas mains, sewer mains, approximately 400m of 900mm storm water culvert, 300mm trunk water main, 100mm water mains and rider mains etc. All valves, hydrants and manholes were renewed as part of a complete make-over. Blackley Construction Ltd also carried out live connections to the existing reticulation network. |
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Project Manawatu District Council A live sewer main renewal to increase invert depth and pipe size over existing to allow for future extensions. This project included replacing all laterals along the line at a greater depth and new manhole installations throughout. The road surface was first hot-mixed to allow prompt traffic flow return and later chip sealed over for like finish. |
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Project Client A section of sewer main required replacement due to its poor condition causing blockages and flow problems in the area. Blackley Construction Ltd are specialists in live sewer renewal work and this was another recent project where a sewer main was renewed while in operation. This project involved replacing the aged GEW pipes and up sizing to a new 375mm PVC main. All manholes and laterals were replaced as part of the work. |
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Farm Irrigation Project This project was devised to enable the consented extraction of water from the Rangitikei River to irrigate a number of large dairy farms nearby during times of low rainfall. The scope work included the construction of a special A-frame type gantry on the river bank and pipe boom arm that is lowered into the water when required. The boom is lifted clear of the water when not in use or during flood conditions to prevent damage from floating logs etc. The pipe boom included dual submersible inlet filter drums and an automated back-flushing system to clear any accumulated debris that could potentially block the filters. A large 350kW electric pump housed in a semi buried concrete bunker was installed to pump the water to approximately 35Ha of dairy paddocks. The pump controller and VSD are totally automated to match demand and irrigation timings and can be controlled and monitored remotely. Electrically actuated diverter valves can be set by remote control to irrigate various paddocks as required. An extensive network of large diameter trunk pipes, feeder branches and valves were laid throughout the farms to reach the connection points for the pod irrigators. The numerous movable pod spray unit sets are connected to in-ground hydrant type valve points located at many convenient field positions. |
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Wind Farm Cable Installation Blackley Construction Ltd were involved in the following wind farm projects: For more general information about these wind farms have a look at the New Zealand Wind Energy Association website: www.nzwea.org.nz. |
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Project: We were involved from the planning stage on the White Hills project, working with the Engineers and Meridian to create a project that was efficient both time wise and financially. This was achieved by being included from an early stage of the design and programming meaning we could optimise the choices made and ensure that no unnecessary difficulties were created. Blackley Construction Ltd worked with a specialist electrical subcontractor to deliver the client with a total package 'turn key' cable installation with all jointing, terminations and testing included with the trenching and cable laying service. We also worked under a partnered risk share contract which saved the client a substantial amount on the project. |
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Project: This project involves upgrading the treatment process to meet new more stringent resource consent conditions. The work to date has included the excavation of a new settling pond, PLC & SCADA installation throughout the plant along with up sized pipework. A new Alum dosing system is being installed along with associated chemical treatments monitoring. New upgraded pumps, splitter pipe work and a control building are all part of the replacement works in progress. |
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Project: The Almadale Road WTP works included upgrading the river intake pipework, settling pond, and control systems including radio telemetry to the control room at the treatment plant. At the treatment plant the clarifier tanks were upgraded, a rapid sand filter was installed to replace the original filters, chemical storage and dosing was installed and pipe work and pumping was installed to fit with the new set up. Computer monitoring and control systems were added to upgrade and update the plants operation. A pump shed and filter control building were also constructed, alterations to existing buildings and maintenance work was carried out on one of the reservoir tanks. Blackley Construction Ltd was the head contractor on this project, working with six main subcontractors bringing together a wide range of skills and specialist knowledge to deliver a successful outcome, upgrading the treatment plant while keeping the water supply live to Feilding and the surrounding area. |
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Sports Field Construction We have been involved in sports field development for many years. Initially we installed subsoil drainage, then we got involved with earthworks and finally our ability to be innovative won us the contract to construct the playing surface at the WestpacTrust Stadium in Wellington. This was a major contract for the company using a design philosophy that had not been constructed on a project of this size before in New Zealand. We were able to work closely with the consultant (NZ Sports Turf Institute) and the head contractor (Fletcher Construction Ltd) to produce a sand over gravel profile to International Standards with an end result we could be (and are) very proud of. Many staff put in long hours and hard work to produce the results. |
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Project: To carry on from our Wellington Stadium success, we successfully tendered the construction of the turf areas for the Manawatu Athletics Track at Massey University. We once again were able to work closely with the Consultant (NZ Sports Turf Institute) and Head Contractor (Higgins Contractors Ltd) to produce an all soil profile to International Standards and are again very proud of the result. |
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Sports Field Construction We have also completed a number of smaller projects for councils and school playing fields, such as:
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Project: The client required a new ring feed water main installed under the main trunk railway lines in Armstrong St linking to an existing water main and increasing the flow capacity to meet the needs of an expanding industrial subdivision.
In conjunction with Palmerston North City Council, Blackley Construction Ltd evaluated the route design and the work required and went about completing a design that suited both the Palmerston North City Council and Trans Rail. As conventional open cut methods of installation were not viable because of the main trunk railway lines, a trenchless methodology installing a 355mm OD pipe was required.
The pipe was approximately 200m long. Blackley Construction Ltd was able to offer a solution that involved ramming two large steel casings under the railway track prior to drilling. From there drilling between the two tracks in separate directions through the casings and out to connect to the existing water main. |
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Project: Complete replacement of the existing water main including all lateral connections and inline fittings. In conjunction with Palmerston North City Council, Blackley Construction Ltd evaluated the route design and work required and prepared a methodology for Palmerston North City Council's approval. Conventional open cut methods of installation were not viable because of protected trees over the existing water main. A trenchless methodology by way of pipe bursting was used to install a 100mm OD PE pipe replacing the cast iron 125mm OD pipe. |
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Project: Due to the storm water easement passing under several houses, replacement of the existing storm water line using conventional methods within the same easements was not possible. The method employed by the Wanganui City Council engineers was to use directional drilling to install a new 400mm OD PE pipe under the affected houses. The 75m pipeline was installed on a grade of 7.4%. Further to the large 400mm OD PE pipe installed, Blackley Construction Ltd also completed a horizontal directional drill installing a 40m x 100mm OD restrain joint PVC sewer lateral and a 120m x 100mm OD restrain joint PVC pipe burst replacing an existing sewer lateral under an additional two houses to the south of the main pipe line. |
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Project: Due to the storm water easement passing under several houses, replacement of the existing storm water line using conventional methods within the same easements was not possible. The method employed by the Wanganui City Council engineers was to use directional drilling to install a new 355mm OD PE pipe under the affected houses. The 70m pipeline was installed successfully despite the difficulties with grade and surrounding environmental and physical limitations. |
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Project: Sections of an aging water main along the banks of the Manawatu River were not able to be replaced using conventional open cut methods due to the environmental impact. Blackley Construction Ltd was approached to complete the water main by way of trenchless technology. Blackley Construction Ltd installed 105m of 450mm OD PE pipe under several large existing tree groupings and existing 33kVa power cables located in the path of the proposed water main. All work completed was within budget and to the client's complete satisfaction. All concerned environmental groups within the regional council were most impressed with how little the work affected the surrounding area. |
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Project: East Coast Utilities are undertaking this project which involves open trenching and drilling to install seven ducts in the required configuration in the road and footpath. There are 6 x 150mm ducts and 1 x 100mm duct approximately 1100m long to install. The trenched section is 1.5m deep by 1.2m wide. Drilled sections consist of 1 x 150mm duct 270m long up a side street and a 75m section of mainline (ie all seven ducts plus one spare) to be drilled under the railway line |
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