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Elements and Performance Criteria

1. Plan and prepare to construct and remove coffer dams
   • Access, interpret and apply coffer dams documentation and ensure the work activity is compliant
   • Obtain, read, interpret, clarify and confirm work requirements
   • Identify, address and report hazards, risks and environmental issues and implement control measures
   • Select and wear personal protective equipment appropriate for work activities
   • Confirm and apply environmental protection and safety requirements
   • Obtain, interpret and implement traffic management signage requirements
   • Select and check for faults plant, tools and equipment to carry out tasks
   • Identify, confirm, safely handle and locate, ready for use, materials required for the work application
   • Obtain and interpret emergency procedures, and be prepared for fire/accident/emergency
2. Construct and maintain dam
   • Contact utilities to check placement of marine cables before coffer dam construction
   • Drive sheet piles into location
   • Brace sheet piles
   • Dewater and caulk dammed area
   • Install sump and/or pump to remove excess water seepage
   • Remove mud manually from dammed area
   • Level dammed area ready for bridge work to commence
3. Remove coffer dam
   • Clear dammed area of any refuse or construction waste
   • Remove temporary concrete slab, where used
   • Flood coffer dam
   • Remove sheet pile
   • Extract and dismantle sheet piling allowing waterway to restore its original flow
4. Clean up
   • Clear work area and dispose of or recycle materials
   • Clean, check, maintain and store machinery, tools and equipment
5. Plan and prepare to construct and remove coffer dams
   • Access, interpret and apply coffer dams documentation and ensure the work activity is compliant
   • Obtain, read, interpret, clarify and confirm work requirements
   • Identify, address and report hazards, risks and environmental issues and implement control measures
   • Select and wear personal protective equipment appropriate for work activities
   • Confirm and apply environmental protection and safety requirements
   • Obtain, interpret and implement traffic management signage requirements
   • Select and check for faults plant, tools and equipment to carry out tasks
   • Identify, confirm, safely handle and locate, ready for use, materials required for the work application
   • Obtain and interpret emergency procedures, and be prepared for fire/accident/emergency
6. Construct and maintain dam
   • Contact utilities to check placement of marine cables before coffer dam construction
   • Drive sheet piles into location
   • Brace sheet piles
   • Dewater and caulk dammed area
   • Install sump and/or pump to remove excess water seepage
   • Remove mud manually from dammed area
   • Level dammed area ready for bridge work to commence
7. Remove coffer dam
   • Clear dammed area of any refuse or construction waste
   • Remove temporary concrete slab, where used
   • Flood coffer dam
   • Remove sheet pile
   • Extract and dismantle sheet piling allowing waterway to restore its original flow
   • Clear work area and dispose of or recycle materials
   • Clean, check, maintain and store machinery, tools and equipment

Performance Evidence

Evidence is required to be collected that demonstrates a candidate’s competency in this unit. Evidence must be relevant to the roles within this sector’s work operations and satisfy all of the requirements of the performance criteria of this unit and include evidence that the candidate:

locates and applies applicable legislation, documentation, policies and procedures

implements the requirements, procedures and techniques for the safe, effective and efficient completion of construction, maintenance and removal of coffer dams including:

selecting and using the required tools and equipment

checking placement of marine cables before coffer dam construction

driving and bracing sheet piles

dewatering, levelling and maintaining dammed area

removing coffer dam

works effectively with others to undertake and complete the construction, maintenance and removal of coffer dams that meets all of the required outcomes including:

organising work activities to meet all task requirements

communicating clearly and concisely with others to receive and clarify work instructions

using a range of communication techniques and systems such as signage to advise others of work activity and exclusion zone

demonstrates completion of constructing, maintaining and removing coffer dams that safely, effectively and efficiently meets all of the required outcomes on more than one (1) occasion including:

identifying, reporting and recording hazards and risks

construction, maintenance and removal of at least one (1) coffer dam, with at least four (4) sheet piles, large enough to require bracing

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Knowledge Evidence

The candidate must demonstrate knowledge of the construction, maintenance and removal of coffer dams through:

applying legislative, organisational and site requirements and procedures for:

site and equipment safety requirements

boat and water safety

sheet piling

environmental protection act

dewatering

caulking

dial before you dig

bridge foundations

bridge heritage

calculation of material requirements

identifying equipment types, characteristics, technical capabilities and limitations

applying and monitoring operational, maintenance and basic diagnostic procedures

applying site isolation and traffic control responsibilities and authorities

interpreting and complying with materials safety data sheets and materials handling methods

monitoring quality assurance systems and standards

preparing and/or implementing JSAs/safe work method statements

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