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Diversions, Modifications & Dismantling

Network change delivered through a controlled transition from existing assets to the new arrangement.

AI Engineering supports overhead-line diversions, conductor and earthwire transfers, temporary arrangements, final connections and controlled dismantling activities, working through the approved construction sequence and network controls applicable to each project.

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Understanding OHL Modifications

Changing an existing line is a sequence, not a single operation.

Diversion and modification works can require existing conductors, earthwire, structures and connection arrangements to remain controlled while new infrastructure is brought into service.

Temporary arrangements, conductor transfers, earthing, final connections, de-rigging and dismantling therefore need to be coordinated against the approved project information, permits and working methodology.

Overhead line diversion and modification works

How a Diversion Progresses

A controlled transition from the existing arrangement to the final connection.

  1. 01

    Review & Prepare

    Review the approved project information, network conditions, permits, access, working areas, plant and construction methodology required for the modification.

  2. 02

    Establish Controls

    Apply the required earthing and work-section controls and prepare the structures, rigging and temporary arrangements needed for the planned transition.

  3. 03

    Transfer Existing Line Components

    Transfer conductors or earthwire from existing structures onto the new or modified infrastructure where required by the approved project sequence.

  4. 04

    Establish Temporary Arrangement

    Install temporary spans, jumper arrangements or other temporary line configurations where these are required to maintain the planned construction sequence.

  5. 05

    Complete Final Connections

    Remove temporary arrangements as required and complete the final downleads, droppers, jumper or line connections included within the project scope.

  6. 06

    De-Rig, Dismantle & Record

    Remove temporary rigging and drain earths as applicable, complete controlled dismantling or recovery activities and assemble the relevant completion records.

Practical Modification Capabilities

Construction activities coordinated around the transition between old and new assets.

01

Conductor Transfers

Controlled transfer of existing conductors between structures where required as part of an approved diversion or modification sequence.

02

Earthwire Transfers

Transfer or modification of earthwire arrangements where included within the approved project works.

03

Temporary Spans

Installation and subsequent removal of temporary span arrangements where required to support the planned transition between existing and new infrastructure.

04

Jumpers & Final Connections

Construction activities associated with temporary or final jumper arrangements, downleads, droppers and other line connections within the agreed scope.

05

Controlled Dismantling

Planned dismantling of redundant line components or associated assets in accordance with the approved methodology.

06

Recovery Activities

Controlled lowering, removal and recovery of redundant components such as ADSS and associated fittings where included within the project scope.

Managing the Transition

Existing assets and new works have to be controlled together.

01

Permits & Network Conditions

Modification activities are coordinated with the permits, outage arrangements and network conditions applicable to the project.

02

Earthing & Work Controls

Conductor, earthwire and drain-earth arrangements are established as required for the activity being undertaken.

03

Temporary Arrangements

Temporary spans, jumper conditions and associated rigging are managed as part of the approved construction sequence.

04

Existing Asset Interfaces

Existing conductors, earthwire, fittings and structures are managed carefully while the new arrangement is introduced.

05

Final Connections

Downleads, droppers, jumpers and associated connections are completed where they form part of the agreed works.

06

Dismantling & Recovery

Redundant components are lowered, removed and recovered in a controlled manner after the relevant transition activities are complete.

Simple Process Flow

How does a network modification move from the existing arrangement to completion?

  1. Approved Project Information
  2. Permits & Work-Section Controls
  3. Prepare New / Modified Infrastructure
  4. Transfer or Establish Temporary Arrangement
  5. Complete Final Connections
  6. Dismantle / Recover Redundant Components
  7. Check, De-Rig & Hand Over

Controlled Dismantling & Recovery

Removal is planned with the same care as installation.

Redundant line components cannot simply be disconnected and dropped. Fittings, rigging, access arrangements and the load on the component need to be controlled through the removal sequence.

AI Engineering's documented ADSS dismantling activities include removal of associated fittings, controlled lowering and recovery through the work section onto a drum where required by the project.

  • 01Prepare access and rigging
  • 02Remove relevant dampers and fittings
  • 03Support the component before release
  • 04Lower components in a controlled manner
  • 05Control movement through intermediate structures
  • 06Recover material onto the required drum or collection arrangement

What AI Engineering Does

Practical support through the transition from existing assets to the final arrangement.

AI Engineering works from the approved project information and construction methodology to coordinate the site activities required for conductor and earthwire transfers, temporary arrangements, final connections, de-rigging and controlled dismantling within the agreed project scope.

  • Modification and work-section preparation
  • Earthing and construction controls
  • Conductor and earthwire transfers
  • Temporary span and jumper activities
  • Final downlead and dropper connections
  • Controlled dismantling and recovery

Where It Fits in OHL Construction

Managing the point where existing infrastructure becomes the new arrangement.

Diversion and modification works sit between the existing network and the completed new infrastructure. Structure erection and line works may already be underway, but the project still needs a controlled sequence to transfer the existing circuit, complete the required connections and remove redundant arrangements.

The exact sequence depends on the approved project design, permits, network conditions and construction scope.

Project Outputs

Records that support a controlled network transition.

Exact records and outputs depend on the agreed project scope, client requirements and modification activities being undertaken.

Construction RAMS

Task-specific method statements and risk controls applicable to the diversion, modification or dismantling works.

Inspection & Hold-Point Records

Construction and QA records associated with required checks and project hold points.

Transfer / Modification Records

Project-specific records associated with conductor, earthwire or connection modifications where required.

Temporary Arrangement Records

Relevant construction records associated with temporary spans, jumper arrangements or other temporary works within the agreed scope.

Dismantling / Recovery Records

Relevant records associated with controlled removal and recovery activities where required by the project.

Completion / As-Built Information

Project-specific completion information prepared in the format required for handover.

Planning OHL Modification Works?

Need support with an overhead-line diversion, modification or dismantling sequence?

Talk to AI Engineering about conductor and earthwire transfers, temporary arrangements, final connections and controlled dismantling or recovery works.

Discuss OHL Requirements →