de Witt Consulting

Surveying

de Witt Consulting has a long history of survey services to the property and construction industry. Our commitment to quality outcomes for our client base and their projects has fostered our evolution into becoming one of the largest surveying teams in the Hunter servicing property and construction developments, major civil infrastructure projects and large scale rail and mining projects throughout New South Wales. 

de Witt Consulting

Major Projects

de Witt Consulting have provided Survey Support to Multiple Major Projects within NSW over the last 5 years. This has included supplying survey teams to support the development and construction of mining, mining infrastructure, rail, coal terminal expansion and major highway upgrade projects.

de Witt Consulting’s range of services on such projects have included major and minor control establishment, set out, bridge set out, volumes and bill of quantities management, compliance surveys and reporting, creation of design models and assistance with machine control and longer term monitoring surveys. de Witt Consulting prides itself on having the latest in technology and software across our projects, along with a range of experienced project surveyors and Registered Surveyors to service the specific needs of the client.

Oxley Highway to Kundabung upgrade

de Witt Consulting have recently completed for Lend Lease a major control survey to install and coordinate the project survey control and to replace all affected State Survey Mark and Permanent Marks for the OH2K Project. This 23 kilometre project is the southern stage of the larger 37 kilometre Oxley Highway to Kempsey project and includes new bridges over the Hastings and Wilson Rivers and a major interchange at Blackmans Point Road.

Ulan West is the underground expansion of the existing coal mine and surface infrastrusture at Ulan, NSW. As Project Surveyors our role included the placement and verification of survey control, detail surveys of existing conveyors and structures, detail surveys to facilitate the design of new conveyor systems, set out of civil works (access roads, conveyor traces, fenced, services etc), underground portals and headings and design and redesign of civil works.

 

de Witt was engaged as the preferred surveying contractor to the Upper Hunter Valley Alliance (“UHVA”). Rail Capacity Improvements Projects to date include Hexham Holding Roads, Liverpool Ranges Duplication, South Gunnedah, Bells Gate, Burilda, Pages River and Chilcotts Creek passing loops. 

Our involvement included establishment of MGA and AHD major control networks using Static GNSS techniques, minor control using conventional total station traverse and digital levelling, track surveys, full detail and topographical, boundary definition and in-ground service location surveys. 

During construction phases of UHVA projects, de Witt provided the project surveyor for two passing loop projects (Parkville Loop Extension and Koolbury Loop), provided multiple crews across associated network possessions as well as general construction support to Leightons providing set out and conformance surveys.

Cadastral boundary surveys on these projects involved the preparation of detailed proposed plans for stakeholder negotiations and final plans for registration at the Land & Property Information including substantial acquisitions plans for the Hexham Holding Roads and Pages River Passing Loop projects, various easements and numerous lease and licence plans over private property and sections of road corridors.

de Witt Consulting have been engaged by Laing O’Rourke to provide the survey support subcontract for the Wickham Transport Interchange Project.  Currently de Witt are supplying fulltime survey resources to the project. de Witt are undertaking project control installation, set out of earthworks, drainage structures, work on roads, rail and rail infrastructure, as well as surveying and documenting the position of existing underground assets. These works will facilitate the final design process and fulfil Sydney Trains Detailed Site Survey (DSS) requirements. Currently, two full-time survey field crews support the construction of the Project and a senior surveyor manages the DSS documentation requirements for Sydney Trains on behalf of the Principal Contractor.

de Witt has provided ongoing surveying services to the Cobbora Coal Project, an extensive proposed mining project west of the Hunter Valley.  The project has a massive project application area of approximately 27,000 hectares. 

Following the approval of the project and the unsuccessful sale of the project, the NSW Government has decided to dispose of land and return it to agricultural use.  Our involvement with this project has included:

  • Extensive cadastral boundary surveys.
  • GNSS control survey to establish a survey control network for the site for the coordination of all survey and mapping.
  • Detail and topographical surveys to facilitate the design of proposed mine infrastructure.
  • Implementation of a survey based cadastral model of the site and surrounding land holdings which provides a dynamic, cost effective solution which enables cadastral constraints to be considered with appropriate accuracy.
  • Preparation of subdivision plans for acquisition of land from adjoining land holders.
  • Developing proposed road re-alignments using constraints mapping (GIS) and report preparation on the roads strategy for the Project Concept Study. 
  • Participation in stakeholder meetings with landholders, Council and other agencies.
  • Survey of exploration and geotechnical drilling programs.
  • Coordinated a detailed survey of over 40 kilometres of infrastructure routes.
  • Preparation of the mining lease plan over 8,500 ha.
  • Preparation of Easement plans over proposed service routes.
  • Land subdivisions.

Pacific Highway

Oxley Highway to Kundabung upgrade

de Witt Consulting have recently completed for Lend Lease a major control survey to install and coordinate the project survey control and to replace all affected State Survey Mark and Permanent Marks for the OH2K Project. This 23 kilometre project is the southern stage of the larger 37 kilometre Oxley Highway to Kempsey project and includes new bridges over the Hastings and Wilson Rivers and a major interchange at Blackmans Point Road.

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Ulan West Project - Stage 2

Ulan West is the underground expansion of the existing coal mine and surface infrastrusture at Ulan, NSW. As Project Surveyors our role included the placement and verification of survey control, detail surveys of existing conveyors and structures, detail surveys to facilitate the design of new conveyor systems, set out of civil works (access roads, conveyor traces, fenced, services etc), underground portals and headings and design and redesign of civil works.

 

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Upper Hunter Valley Rail Capacity Improvements

de Witt was engaged as the preferred surveying contractor to the Upper Hunter Valley Alliance (“UHVA”). Rail Capacity Improvements Projects to date include Hexham Holding Roads, Liverpool Ranges Duplication, South Gunnedah, Bells Gate, Burilda, Pages River and Chilcotts Creek passing loops. 

Our involvement included establishment of MGA and AHD major control networks using Static GNSS techniques, minor control using conventional total station traverse and digital levelling, track surveys, full detail and topographical, boundary definition and in-ground service location surveys. 

During construction phases of UHVA projects, de Witt provided the project surveyor for two passing loop projects (Parkville Loop Extension and Koolbury Loop), provided multiple crews across associated network possessions as well as general construction support to Leightons providing set out and conformance surveys.

Cadastral boundary surveys on these projects involved the preparation of detailed proposed plans for stakeholder negotiations and final plans for registration at the Land & Property Information including substantial acquisitions plans for the Hexham Holding Roads and Pages River Passing Loop projects, various easements and numerous lease and licence plans over private property and sections of road corridors.

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Wickham interchange project

de Witt Consulting have been engaged by Laing O’Rourke to provide the survey support subcontract for the Wickham Transport Interchange Project.  Currently de Witt are supplying fulltime survey resources to the project. de Witt are undertaking project control installation, set out of earthworks, drainage structures, work on roads, rail and rail infrastructure, as well as surveying and documenting the position of existing underground assets. These works will facilitate the final design process and fulfil Sydney Trains Detailed Site Survey (DSS) requirements. Currently, two full-time survey field crews support the construction of the Project and a senior surveyor manages the DSS documentation requirements for Sydney Trains on behalf of the Principal Contractor.

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Cobbora Coal Project

de Witt has provided ongoing surveying services to the Cobbora Coal Project, an extensive proposed mining project west of the Hunter Valley.  The project has a massive project application area of approximately 27,000 hectares. 

Following the approval of the project and the unsuccessful sale of the project, the NSW Government has decided to dispose of land and return it to agricultural use.  Our involvement with this project has included:

  • Extensive cadastral boundary surveys.
  • GNSS control survey to establish a survey control network for the site for the coordination of all survey and mapping.
  • Detail and topographical surveys to facilitate the design of proposed mine infrastructure.
  • Implementation of a survey based cadastral model of the site and surrounding land holdings which provides a dynamic, cost effective solution which enables cadastral constraints to be considered with appropriate accuracy.
  • Preparation of subdivision plans for acquisition of land from adjoining land holders.
  • Developing proposed road re-alignments using constraints mapping (GIS) and report preparation on the roads strategy for the Project Concept Study. 
  • Participation in stakeholder meetings with landholders, Council and other agencies.
  • Survey of exploration and geotechnical drilling programs.
  • Coordinated a detailed survey of over 40 kilometres of infrastructure routes.
  • Preparation of the mining lease plan over 8,500 ha.
  • Preparation of Easement plans over proposed service routes.
  • Land subdivisions.

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Land and Property Development

The land development team at de Witt Consulting include Registered Surveyors and Towner Planners with a wealth of experience and know how across residential, industrial and commercial developments. Our people are experts in providing advice and services from the initial concept stage right through to the registration of the final plan. Please see below our services relating to the surveying components of these services.

SUBDIVISION
de Witt Consulting have been involved with large scale greenfield subdivisions through to small Torrens Title dual occupancy  developments on behalf of our clients since the start of the company. de Witt’s experienced team can offer advice and provide solutions from the concept stage by investigating site constraints, the development application stage, preparing draft plans and the relevant documents for sales purposes, undertaking the required survey works, plan preparation and electronic lodgement with Land and Property Information (LPI).  

STRATA SUBDIVISION
de Witt Consulting have been involved with strata subdivision of dual occupancies through to complex staged strata schemes and stratum subdivisions involving a number of separate strata schemes. Working with developers, builders, architects, strata managers, solicitors, certifiers, Councils, estate agents and development managers our surveyors can assist and add value to a project from inception through to registration of the final plan at the LPI.

COMMUNITY TITLE
The Community Title legislation was created in 1973 to fill the void between traditional methods of subdivision and strata subdivision (previously the only methods of subdividing land in NSW). The effect of the legislation enabled shared or community property to be created within conventional subdivisions. Community Title legislation allows for the provision of common facilities and common areas to attract home owners into particular developments for facilities that they may otherwise not be able to afford, it can also provide a path forward for developers to develop otherwise undevelopable projects due to site restraints or the need for the provision of particular shared infrastructure that will not be provided by local Councils or authorities.

de Witt Consulting have been involved with several Community Title projects from conception where this title system allowed the successful development of strong communities for the developer and the incoming owners. Our planners and surveyors are able to offer expert advice on the options available to developers within the community title legislation and to complete all aspects of the planning and surveying of such developments.

Subdivisions

de Witt Consulting were engaged to undertake a detail survey, subsequent preparation of a draft plan of subdivision for DA purposes and have recently completed the 42 lot final plan of subdivision for the developer being Stevens Group. The preparation of the final plan involved undertaking the necessary field and office work by our survey and drafting teams to ensure all of the relevant requirements for the Subdivision Certificate and registration were met.

Admirals Garden Estate is a 43 lot residential subdivision at Warners Bay. Our surveyors have been involved with all aspects of the survey associated with the development of this land including detail and topographical surveys, infrastructure lead in surveys, surround cadastral boundary survey, layout design, set out of the civil works for the contractor (Woodbury’s Haulage & Earthmoving), work-as-executed surveys and preparing the final plan of subdivision. In addition our Registered Surveyors supervised the construction and coordination of the the subdivision works and approvals with service authorities. This development was managed by de Witt Consulting from rezoning through to registration of the residential land.

Survey services undertaken by de Witt Consulting for this project included the preparation of sales plans for the greater project, establishment of survey control for civil works and upon completion of construction the preparation of the final plans for lodgement with the Land and Property Information. This project was undertaken by our survey and drafting teams in close contact with the development company McCloy Group. 

de Witt Consulting were involved from the early concept stages through to the final plan of subdivision providing both town planning and survey services.  The development of the site involved excising the development site from a larger land holding and the development planning of the proposed industrial subdivision through an extensive approval process which de Witt prepared and managed. Through the subdivision phase our Registered Surveyors prepared the works as executed surveys, provided specialist advice and prepared and lodged the final plan of subdivision with both Council and the LPI. 

Ridgeview Estate

de Witt Consulting were engaged to undertake a detail survey, subsequent preparation of a draft plan of subdivision for DA purposes and have recently completed the 42 lot final plan of subdivision for the developer being Stevens Group. The preparation of the final plan involved undertaking the necessary field and office work by our survey and drafting teams to ensure all of the relevant requirements for the Subdivision Certificate and registration were met.

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Admirals Garden Estate

Admirals Garden Estate is a 43 lot residential subdivision at Warners Bay. Our surveyors have been involved with all aspects of the survey associated with the development of this land including detail and topographical surveys, infrastructure lead in surveys, surround cadastral boundary survey, layout design, set out of the civil works for the contractor (Woodbury’s Haulage & Earthmoving), work-as-executed surveys and preparing the final plan of subdivision. In addition our Registered Surveyors supervised the construction and coordination of the the subdivision works and approvals with service authorities. This development was managed by de Witt Consulting from rezoning through to registration of the residential land.

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Aquilo Stage 2 – Residential Subdivision

Survey services undertaken by de Witt Consulting for this project included the preparation of sales plans for the greater project, establishment of survey control for civil works and upon completion of construction the preparation of the final plans for lodgement with the Land and Property Information. This project was undertaken by our survey and drafting teams in close contact with the development company McCloy Group. 

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Templar Place - Industrial Subdivision

de Witt Consulting were involved from the early concept stages through to the final plan of subdivision providing both town planning and survey services.  The development of the site involved excising the development site from a larger land holding and the development planning of the proposed industrial subdivision through an extensive approval process which de Witt prepared and managed. Through the subdivision phase our Registered Surveyors prepared the works as executed surveys, provided specialist advice and prepared and lodged the final plan of subdivision with both Council and the LPI. 

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Strata

de Witt Consulting worked closely with the devloper to facilitate the registration of this 16 lot mixed use strata development. Our Registered Surveyors were involved in project meetings relating to bylaws particularly exclusive use bylaws, certification of the strata plan and the process through to registration with the LPI. Our team completed all of the related setout works for the construction of the project and prepared a plan of redefinition and the final strata plan to faciliate registration and settlement of the strata lots.

The Sky Central Development Charlestown included the Stratum Subdivision of two buildings and creation of 4 separate Strata Schemes for the various residential and commercial premises. Our Registered Surveyors provided advice to the project team, prepared the required Stratum and Strata Plans, preparation of Building Management Statement Plans for shared facilities (including lifts, car parking and access, ventilation, foyers, loading docks and fire stairs), creation of easements and sites of exclusive use of common property for the by-laws. Our Registered Surveyors were also instrumental in the creation of a stratum for lease of airspace above the Pacific Highway to provide for pedestrian walkway and the construction set out of the development.

de Witt Consulting provided survey services to the project from construction set out works and compliance surveys to management and preparation of the 2 Lot Stratum development and subsequent 49 Lot residential and 3 Lot Commercial Strata Subdivisions.

Darby Street Apartments

de Witt Consulting worked closely with the devloper to facilitate the registration of this 16 lot mixed use strata development. Our Registered Surveyors were involved in project meetings relating to bylaws particularly exclusive use bylaws, certification of the strata plan and the process through to registration with the LPI. Our team completed all of the related setout works for the construction of the project and prepared a plan of redefinition and the final strata plan to faciliate registration and settlement of the strata lots.

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Sky Central - Stratum & Strata Subdivision

The Sky Central Development Charlestown included the Stratum Subdivision of two buildings and creation of 4 separate Strata Schemes for the various residential and commercial premises. Our Registered Surveyors provided advice to the project team, prepared the required Stratum and Strata Plans, preparation of Building Management Statement Plans for shared facilities (including lifts, car parking and access, ventilation, foyers, loading docks and fire stairs), creation of easements and sites of exclusive use of common property for the by-laws. Our Registered Surveyors were also instrumental in the creation of a stratum for lease of airspace above the Pacific Highway to provide for pedestrian walkway and the construction set out of the development.

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Throsby Street Development - Stratum & Strata Subdivision

de Witt Consulting provided survey services to the project from construction set out works and compliance surveys to management and preparation of the 2 Lot Stratum development and subsequent 49 Lot residential and 3 Lot Commercial Strata Subdivisions.

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Land Community

de Witt Consulting provided professional planning services in the planning stages for a number of proposed projects considered on this site.  The approved development involved a 24 small lot housing development completed in 3 stages through a Community Title Scheme for which de Witt was responsible for the development application and management of the project through the design and civil construction phases. Our surveying services included the set out and compliance surveys for the civil works, dwelling set out and the preparation of the final Community Title plans for each stage.  

de Witt Consulting provided full planning and surveying services which realised the development of this long vacant site in Kotara. The site being a former private rail corridor was narrow and further constrained by a high pressure gas main. Community Title in this instance provided for a narrower shared community road and shared servicing of lots enabling the site to be developed into prime vacant residential lots.  

Glenrock Grove - Community Title Subdivision

de Witt Consulting provided professional planning services in the planning stages for a number of proposed projects considered on this site.  The approved development involved a 24 small lot housing development completed in 3 stages through a Community Title Scheme for which de Witt was responsible for the development application and management of the project through the design and civil construction phases. Our surveying services included the set out and compliance surveys for the civil works, dwelling set out and the preparation of the final Community Title plans for each stage.  

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Raspberry Grove - Community Title Subdivision

de Witt Consulting provided full planning and surveying services which realised the development of this long vacant site in Kotara. The site being a former private rail corridor was narrow and further constrained by a high pressure gas main. Community Title in this instance provided for a narrower shared community road and shared servicing of lots enabling the site to be developed into prime vacant residential lots.  

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Building and Construction

de Witt Consulting has been undertaking construction related surveying projects since the company’s establishment in 2003.  de Witt Consulting provides construction set out on projects of all size and scale for project home builders, building contractors and major construction companies.  de Witt Consulting prides itself on being able to supply to the construction industry in dynamic environments.  Combined, our survey offices at Charlestown and Gulgong have the capability of 17 survey crews, with experienced surveyors who use the latest in survey technology to ensure innovative and best practise solutions are utilised to deliver quality project results for our clients.

de Witt Consulting have supplied Richard Crooks Constructions with all surveying services associated with the construction of the residential Arena Project on Newcastle Beach. Initially de Witt Consulting were engaged to undertake the installation of site control and project establishment, bulk earthworks and structure set outs, and the necessary compliance surveys for the South Tower. Based on successful outcomes and supply of services on the South Tower de Witt have been subsequently engaged to undertake the same scope of works to complete the Arena North Tower.

de Witt Consulting were engaged by John Holland Group (JHG) to supply all surveying services associated with the construction of the John Hunter Hospital Southern carpark extension. The scope of the survey included the establishment and installation of site control which involved aligning the proposed design with the existing carpark structure to the north, set out of all piles and concrete columns, set out for the carpark landings and the ramps connecting the various levels of the structure as well as the completion of the compliance documentation required by JHG to allow the project handover.

de Witt provided ongoing survey services to the Hunter Sporting Venues Authority involving the redevelopment of Hunter Stadium over a number years.  This included the preparation of extensive detail survey plans and service locations that have been used as the basis for the redevelopment of Hunter Stadium. de Witt Consulting have also prepared a plan of subdivision for the management of long term leases. de Witt completed the construction set out survey of the Western Grandstand for construction firm John Holland.

de Witt Consulting's involvement in the solar field of the CSIRO’s Energy Research Facility in Newcastle has included detail surveys to facilitate the layout and design of the solar field and the construction set out of the various components including a tower and hundreds of mirrors. de Witt's Surveying team still regularly attend the site to assist with alignment of the various solar infrastructure.

Arena - North & South Towers

de Witt Consulting have supplied Richard Crooks Constructions with all surveying services associated with the construction of the residential Arena Project on Newcastle Beach. Initially de Witt Consulting were engaged to undertake the installation of site control and project establishment, bulk earthworks and structure set outs, and the necessary compliance surveys for the South Tower. Based on successful outcomes and supply of services on the South Tower de Witt have been subsequently engaged to undertake the same scope of works to complete the Arena North Tower.

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John Hunter Hospital Southern Carpark Extension

de Witt Consulting were engaged by John Holland Group (JHG) to supply all surveying services associated with the construction of the John Hunter Hospital Southern carpark extension. The scope of the survey included the establishment and installation of site control which involved aligning the proposed design with the existing carpark structure to the north, set out of all piles and concrete columns, set out for the carpark landings and the ramps connecting the various levels of the structure as well as the completion of the compliance documentation required by JHG to allow the project handover.

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Hunter Stadium - Newcastle

de Witt provided ongoing survey services to the Hunter Sporting Venues Authority involving the redevelopment of Hunter Stadium over a number years.  This included the preparation of extensive detail survey plans and service locations that have been used as the basis for the redevelopment of Hunter Stadium. de Witt Consulting have also prepared a plan of subdivision for the management of long term leases. de Witt completed the construction set out survey of the Western Grandstand for construction firm John Holland.

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CSIRO, Energy Research Facility, Newcastle

de Witt Consulting's involvement in the solar field of the CSIRO’s Energy Research Facility in Newcastle has included detail surveys to facilitate the layout and design of the solar field and the construction set out of the various components including a tower and hundreds of mirrors. de Witt's Surveying team still regularly attend the site to assist with alignment of the various solar infrastructure.

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Rail

de Witt Consulting have been providing surveying services to the rail industry over the past 7 years.  Our capabilities and recent projects are listed below:

Capabilities

  • Surveys for set out of new track, turnouts and track realignment.
  • Construction surveys for set out of civil works & structures.
  • Track Control Marks placement for reconditioning and resurfacing.
  • Track realignments and regradings.
  • Level crossing upgrades.
  • Detail surveys for bridge renewals.
  • Survey for track possession works.
  • Platform and clearance surveys.
  • Tunnel, structure and embankment monitoring.
  • Track and infrastructure surveys for design purposes.
  • Detailed and topographical surveys.
  • Rail corridor cadastral boundary surveys.
  • Acquisition, lease and easement and right of carriageway plans.
  • In and above ground Services and Utilities Plans.
  • 3D Terrestrial Laser Scanning / point cloud surveys.
  • Control and verification surveys for LIDAR surveys.
  • Control surveys including for the establishment of MGA & AHD alignments.
  • Survey Support for Rail Possessions.

de Witt Consulting was engaged by Robson Civil, Lend Lease, Downer  and Laing O’Rourke separately as their surveyors for the “NCIG Rail Flyover Project”. The project scope was the provision of additional arrival roads into the Coal Terminal in order to relieve congestion at the Newcastle Coal Infrastructure Group and Port Waratah Coal terminals. The project involved constructing 1,500m of rail embankments, the rail bridge, rail lines and rail signalling services. de Witt Consulting have provided fulltime survey support to Robson Civil for the earthworks component of the project, ongoing rail construction survey support for Laing O’Rourke for all rail construction activities, full time survey support to Lend Lease for the rail flyover bridge itself which was completed to RMS G71 specification and survey when required for the pickup of signalling works for Downer Infrastructure. Our involvement as project surveyors has utilised up to 4 survey parties at any one time servicing the requirements of our multiple clients on this project.

de Witt was engaged as the preferred surveying contractor to the Upper Hunter Valley Alliance (“UHVA”). Rail Capacity Improvements Projects to date include Hexham Holding Roads, Liverpool Ranges Duplication, South Gunnedah, Bells Gate, Burilda, Pages River and Chilcotts Creek passing loops. 

Our involvement included establishment of MGA and AHD major control networks using Static GNSS techniques, minor control using conventional total station traverse and digital levelling, track surveys, full detail and topographical, boundary definition and in-ground service location surveys. 

During construction phases of UHVA projects, de Witt provided the project surveyor for two passing loop projects (Parkville Loop Extension and Koolbury Loop), provided multiple crews across associated network possessions as well as general construction support to Leightons providing set out and conformance surveys.

Cadastral boundary surveys on these projects involved the preparation of detailed proposed plans for stakeholder negotiations and final plans for registration at the Land & Property Information including substantial acquisitions plans for the Hexham Holding Roads and Pages River Passing Loop projects, various easements and numerous lease and licence plans over private property and sections of road corridors.

de Witt Consulting have been engaged by Laing O’Rourke to provide the survey support subcontract for the Wickham Transport Interchange Project.  Currently de Witt are supplying fulltime survey resources to the project. de Witt are undertaking project control installation, set out of earthworks, drainage structures, work on roads, rail and rail infrastructure, as well as surveying and documenting the position of existing underground assets. These works will facilitate the final design process and fulfil Sydney Trains Detailed Site Survey (DSS) requirements. Currently, two full-time survey field crews support the construction of the Project and a senior surveyor manages the DSS documentation requirements for Sydney Trains on behalf of the Principal Contractor.

This project involved the establishment of MGA and AHD (Major Survey Control Marks) in a region of the state where there is very limited survey control. Using CORSNET static datasets and traditional fast static the de Witt survey team designed, surveyed and adjusted a major control network suitable for the coordination, survey and design of the rail asset over the 87km section of track. The control survey was completed to SP1 standards. The experience of the de Witt team and approach allowed the project to proceed past milestones with minimum consultation with the client representative, as well as provide solutions to irregularities in adjoining MGA rail survey control networks. With track design required on 23 curves (approx.20km) spread over the 87km project; minor survey control was established using Total Station and Digital Level observations coordinated from the overarching static major control network.  Track surveys were completed using established methods and following the completion of the horizontal and vertical design by Parsons Brinkerhoff, the design alignment of the curves were marked with track control marks in accordance with John Holland Rail Country Regional Network requirements.   Combined RTK, total station and static GNSS observations provided an efficient and project specific solution to all aspects of the survey and allowed the project to be completed in a limited timeframe.

In preparation for stages 2 and 3 of the remediation, de Witt’s surveyor undertook a laser scan survey of the entire 780 metre length of the tunnel including coordinating the point cloud data from the scans and the design alignment to ARTC survey control. The deliverables included providing ARTC with point cloud data, DTM model of the tunnel walls/structure as well as cross sectional data at 5 metre intervals at the two remediation sites within the tunnel. This survey was carried out over 2 days within a rail possession.  Additionally during the following possession our de Witt team completed the installation of further survey control and monitoring points (prisms and spigots) within the tunnel to provide for monitoring during construction and provided advice to ARTC with regards to methodologies for ongoing monitoring surveys.  Come the reconstruction phase of this project, de Witt Consulting were engaged by Goldsprings Rail to provide survey support for the construction as well as provide real time monitoring of the tunnel during construction to satisfy ARTC monitoring requirements. In 2016 de Witt have been engaged by ARTC to set up the monitoring requirements for Bylong Tunnel No. 3 reconstruction works. 

de Witt Consulting have provided survey services to this project which was undertaken over a number of scheduled possessions. The project involved the complete removal and instillation of new material and track reconstruction as well as the construction of new drainage structures. During the possessions de Witt Consulting have provided the client with two survey parties for both the day and night shifts during which set out and conformance on both the civil and track works were undertaken.

NCIG rail flyover

de Witt Consulting was engaged by Robson Civil, Lend Lease, Downer  and Laing O’Rourke separately as their surveyors for the “NCIG Rail Flyover Project”. The project scope was the provision of additional arrival roads into the Coal Terminal in order to relieve congestion at the Newcastle Coal Infrastructure Group and Port Waratah Coal terminals. The project involved constructing 1,500m of rail embankments, the rail bridge, rail lines and rail signalling services. de Witt Consulting have provided fulltime survey support to Robson Civil for the earthworks component of the project, ongoing rail construction survey support for Laing O’Rourke for all rail construction activities, full time survey support to Lend Lease for the rail flyover bridge itself which was completed to RMS G71 specification and survey when required for the pickup of signalling works for Downer Infrastructure. Our involvement as project surveyors has utilised up to 4 survey parties at any one time servicing the requirements of our multiple clients on this project.

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Upper Hunter Valley Rail Capacity Improvements

de Witt was engaged as the preferred surveying contractor to the Upper Hunter Valley Alliance (“UHVA”). Rail Capacity Improvements Projects to date include Hexham Holding Roads, Liverpool Ranges Duplication, South Gunnedah, Bells Gate, Burilda, Pages River and Chilcotts Creek passing loops. 

Our involvement included establishment of MGA and AHD major control networks using Static GNSS techniques, minor control using conventional total station traverse and digital levelling, track surveys, full detail and topographical, boundary definition and in-ground service location surveys. 

During construction phases of UHVA projects, de Witt provided the project surveyor for two passing loop projects (Parkville Loop Extension and Koolbury Loop), provided multiple crews across associated network possessions as well as general construction support to Leightons providing set out and conformance surveys.

Cadastral boundary surveys on these projects involved the preparation of detailed proposed plans for stakeholder negotiations and final plans for registration at the Land & Property Information including substantial acquisitions plans for the Hexham Holding Roads and Pages River Passing Loop projects, various easements and numerous lease and licence plans over private property and sections of road corridors.

CLOSE

Wickham interchange project

de Witt Consulting have been engaged by Laing O’Rourke to provide the survey support subcontract for the Wickham Transport Interchange Project.  Currently de Witt are supplying fulltime survey resources to the project. de Witt are undertaking project control installation, set out of earthworks, drainage structures, work on roads, rail and rail infrastructure, as well as surveying and documenting the position of existing underground assets. These works will facilitate the final design process and fulfil Sydney Trains Detailed Site Survey (DSS) requirements. Currently, two full-time survey field crews support the construction of the Project and a senior surveyor manages the DSS documentation requirements for Sydney Trains on behalf of the Principal Contractor.

CLOSE

Burren Junction to Walgett Track Survey

This project involved the establishment of MGA and AHD (Major Survey Control Marks) in a region of the state where there is very limited survey control. Using CORSNET static datasets and traditional fast static the de Witt survey team designed, surveyed and adjusted a major control network suitable for the coordination, survey and design of the rail asset over the 87km section of track. The control survey was completed to SP1 standards. The experience of the de Witt team and approach allowed the project to proceed past milestones with minimum consultation with the client representative, as well as provide solutions to irregularities in adjoining MGA rail survey control networks. With track design required on 23 curves (approx.20km) spread over the 87km project; minor survey control was established using Total Station and Digital Level observations coordinated from the overarching static major control network.  Track surveys were completed using established methods and following the completion of the horizontal and vertical design by Parsons Brinkerhoff, the design alignment of the curves were marked with track control marks in accordance with John Holland Rail Country Regional Network requirements.   Combined RTK, total station and static GNSS observations provided an efficient and project specific solution to all aspects of the survey and allowed the project to be completed in a limited timeframe.

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Kerrabee Tunnel

In preparation for stages 2 and 3 of the remediation, de Witt’s surveyor undertook a laser scan survey of the entire 780 metre length of the tunnel including coordinating the point cloud data from the scans and the design alignment to ARTC survey control. The deliverables included providing ARTC with point cloud data, DTM model of the tunnel walls/structure as well as cross sectional data at 5 metre intervals at the two remediation sites within the tunnel. This survey was carried out over 2 days within a rail possession.  Additionally during the following possession our de Witt team completed the installation of further survey control and monitoring points (prisms and spigots) within the tunnel to provide for monitoring during construction and provided advice to ARTC with regards to methodologies for ongoing monitoring surveys.  Come the reconstruction phase of this project, de Witt Consulting were engaged by Goldsprings Rail to provide survey support for the construction as well as provide real time monitoring of the tunnel during construction to satisfy ARTC monitoring requirements. In 2016 de Witt have been engaged by ARTC to set up the monitoring requirements for Bylong Tunnel No. 3 reconstruction works. 

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Telarah Stage 3 – Rail reconstruction & drainage construction

de Witt Consulting have provided survey services to this project which was undertaken over a number of scheduled possessions. The project involved the complete removal and instillation of new material and track reconstruction as well as the construction of new drainage structures. During the possessions de Witt Consulting have provided the client with two survey parties for both the day and night shifts during which set out and conformance on both the civil and track works were undertaken.

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Laser Scanning

de Witt Consulting have been providing Laser Scanning Services for the past 3 years. Laser Scanning Technology provides a cost effective survey solution where a high level of accurate detail is required for design and engineering applications, monitoring and dilapidation surveys and access constrained sites. The Laser Scanner has also been utilised on projects to create safe working for personnel where conventional techniques cannot be undertaken safely or other controls are difficult to obtain.

A Laser Scanner collects hundreds of thousands of closely spaced surface geometry measurements (points) to high accuracy in just minutes. These surface points combine to form a ‘point cloud’ which when displayed on a computer screen or cad software / viewers etc. forms a dense 3D bit-map image of the surveyed area. The point cloud can be viewed and navigated much like a 3D model however each of these scanned points is not simply a ‘dumb’ pixel, it has true site X, Y and Z coordinates that can be interrogated.

Laser Scanning can decrease engineering costs, allow reverse engineering, shorten programs, generate ‘’as-built’’ documentation ideal for asset management and provide a whole new perspective to projects.

Laser Scanning also offers an ideal input for designing modifications to existing sites, structures or facilities.

The data can be delivered as point cloud data or as modelled 3D surfaces and shapes. As-built models can be produced from the point cloud data providing the client with an intelligent virtual 3D environment that accommodates the basis for future planning and maintenance. Among other features our point cloud / scan software can simulate ‘’clash detection’’ which ensures that component conflicts can be avoided during design, colour map deformation on structures and model point clouds into 3D surfaces. Our laser scanner can also capture high definition images that can be overlayed onto the point cloud. This simulates an environment with real world colours ideal for street scapes where a real world representation is needed.

de Witt Consulting was engaged on this project in the early stages of the Stage 2 Construction of The Ulan West Project to provide Laser Scanning Services to Downer Engineering to capture existing structural elements that were to be tied into the new coal handling facilities. The structural elements required ranged from the positions of existing baseplates, steel columns and beams, conveyor idler frames, conveyor pulley, coal shoots and take up pulley rails. Conventionally these types of surveys are very time consuming and intense as the surveyor must individually locate each critical point which needs to be marked up on a plan or photograph for a designer in addition to the x, y, z point data. Utilising Laser Scanning technology allows a full 3D ‘point cloud’ to be captured from any one stations in minutes which can be directly provided to the designer with an overlaid photograph taken by the Scanner during the scanning process. The superior deliverable allows the designer to quickly and confidently move through a point cloud and analyse existing structural elements and indeed other details which may not have been realised in a ‘normal’ survey or visual inspection.

As with any other survey data, point cloud data can be related to site survey control (for instance MGA and AHD) and be scaled between grid and ground coordinate systems.

For specialist survey UGL came to de Witt Consulting to undertake surveys of the existing towers on site and generate working drawings to allow the offsite pre fabrication of gantry sections to fit between the exiting towers specifically utilising existing bolt holes within these towers. The towers were over 25m high and access to multiple areas of the substation was restricted due to safe working conditions. de Witt Consulting was able to utilise Laser Scanning technology to quickly and easily capture 3D point clouds of the towers and maintain safe working requirements of the site. The deliverables for this project included plans created from point cloud data. Post prefabrication UGL reported that the new gantry sections accurately aligned with the existing bolt holes and that this particular project element was a success.

In preparation for stages 2 and 3 of the remediation, de Witt’s surveyor undertook a laser scan survey of the entire 780 metre length of the tunnel including coordinating the point cloud data from the scans and the design alignment to ARTC survey control. The deliverables included providing ARTC with point cloud data, DTM model of the tunnel walls/structure as well as cross sectional data at 5 metre intervals at the two remediation sites within the tunnel. This survey was carried out over 2 days within a rail possession.  Additionally during the following possession our de Witt team completed the installation of further survey control and monitoring points (prisms and spigots) within the tunnel to provide for monitoring during construction and provided advice to ARTC with regards to methodologies for ongoing monitoring surveys.  Come the reconstruction phase of this project, de Witt Consulting were engaged by Goldsprings Rail to provide survey support for the construction as well as provide real time monitoring of the tunnel during construction to satisfy ARTC monitoring requirements. In 2016 de Witt have been engaged by ARTC to set up the monitoring requirements for Bylong Tunnel No. 3 reconstruction works. 

ULAN WEST PROJECT

de Witt Consulting was engaged on this project in the early stages of the Stage 2 Construction of The Ulan West Project to provide Laser Scanning Services to Downer Engineering to capture existing structural elements that were to be tied into the new coal handling facilities. The structural elements required ranged from the positions of existing baseplates, steel columns and beams, conveyor idler frames, conveyor pulley, coal shoots and take up pulley rails. Conventionally these types of surveys are very time consuming and intense as the surveyor must individually locate each critical point which needs to be marked up on a plan or photograph for a designer in addition to the x, y, z point data. Utilising Laser Scanning technology allows a full 3D ‘point cloud’ to be captured from any one stations in minutes which can be directly provided to the designer with an overlaid photograph taken by the Scanner during the scanning process. The superior deliverable allows the designer to quickly and confidently move through a point cloud and analyse existing structural elements and indeed other details which may not have been realised in a ‘normal’ survey or visual inspection.

As with any other survey data, point cloud data can be related to site survey control (for instance MGA and AHD) and be scaled between grid and ground coordinate systems.

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WEST WALLSEND SUBSTATION

For specialist survey UGL came to de Witt Consulting to undertake surveys of the existing towers on site and generate working drawings to allow the offsite pre fabrication of gantry sections to fit between the exiting towers specifically utilising existing bolt holes within these towers. The towers were over 25m high and access to multiple areas of the substation was restricted due to safe working conditions. de Witt Consulting was able to utilise Laser Scanning technology to quickly and easily capture 3D point clouds of the towers and maintain safe working requirements of the site. The deliverables for this project included plans created from point cloud data. Post prefabrication UGL reported that the new gantry sections accurately aligned with the existing bolt holes and that this particular project element was a success.

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Kerrabee Tunnel

In preparation for stages 2 and 3 of the remediation, de Witt’s surveyor undertook a laser scan survey of the entire 780 metre length of the tunnel including coordinating the point cloud data from the scans and the design alignment to ARTC survey control. The deliverables included providing ARTC with point cloud data, DTM model of the tunnel walls/structure as well as cross sectional data at 5 metre intervals at the two remediation sites within the tunnel. This survey was carried out over 2 days within a rail possession.  Additionally during the following possession our de Witt team completed the installation of further survey control and monitoring points (prisms and spigots) within the tunnel to provide for monitoring during construction and provided advice to ARTC with regards to methodologies for ongoing monitoring surveys.  Come the reconstruction phase of this project, de Witt Consulting were engaged by Goldsprings Rail to provide survey support for the construction as well as provide real time monitoring of the tunnel during construction to satisfy ARTC monitoring requirements. In 2016 de Witt have been engaged by ARTC to set up the monitoring requirements for Bylong Tunnel No. 3 reconstruction works. 

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3D Revit Modelling

de Witt Consulting have the ability, skills and knowhow to produce accurate 3D architectural models and 3D visualisations & renders.

Our 3D models are created in top of the line 3D architectural modelling software called Autodesk Revit and can be created from as built survey point clouds using our 3D Laser Scanning capabilities or from 2D design plans.

These 3D models can be supplied to architects and used in an array of different applications such as street scapes, visual renders and building extensions & modifications. In addition, our models can also be the basis for building information modelling (BIM).

Land Boundary

de Witt Consulting’s Registered Surveyors can assist and provide advice with regard to all aspects of cadastral boundary surveying and Land Title matters including the following:

  • Roads including road closures, opening and status reviews. 
  • Plans of redefinition / delimitation.
  • Boundary marking.
  • Easements & rights of carriageway.
  • Lease of premises and land.
  • License and permissible occupancy lands.
  • “BOMA” or “PCA”measurements.
  • Mean High Water boundaries.
  • Aboriginal Land Claims.
  • Acquisitions and resumption surveys.
  • Identification Surveys
  • Old System Title and Primary Applications.
  • Subdivisions.

Detail

de Witt Consulting have the capacity and knowledge to complete detail surveys for all project specific investigation and design requirements through the use of conventional Total Stations and GPS as well as Laser Scanning technologies or indeed a combination of all.  Working consistently with engineers, architects and project managers our surveyors always look to undertake surveys and prepare deliverables using the most efficient means available whilst adhering to accuracy, quality and safety requirements.  Examples of detail surveys include:

  • All topographical and feature surveys.
  • Greenfield development sites.
  • Development sites including details of adjoining structures.
  • Road detail surveys    (de Witt Consulting are Roads and Martine Service panel members).
  • Rail detail and track alignment surveys.

Get in touch

Head Office Charlestown

7 Canberra Street Charlestown NSW 2290

PH: 02 4942 5441

Sydney Office

Level 32,101 Miller Street North Sydney NSW 2060

PH: 02 8019 7268

Western Office

87 Herbert Street Gulgong NSW 2852

PH: 02 6374 2911