Building a Farm Dam

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A new streamlined, risk-based approach for the approval of farm dam construction has been developed by the Tasmanian Government. This is the result of amendments to the Water Management Act 1999 (the Act) that came into force on 1 January 2016.

Farm Dam Construction Factsheets

A series of factsheets that outline the requirements for seeking approval and building a farm dam.

Factsheet 1 - Building a Farm Dam

If a proposed dam meets all of the specific criteria that deem it to be lower risk, it will go through a simple permitting process. Dams not meeting all of these criteria are considered to be higher risk and will require a full application, assessment and permitting process.

Lower risk dams must meet ALL of these:

  • are not on a watercourse or water way (including a flood plain), and
  • have a maximum wall height of less than 10 metres, and
  • do not involve the clearing of more than 1ha of native vegetation, and
  • present a low risk to people, infrastructure or the environment in the event of failure, and
  • on land not subject to any covenants, encumberances nor owned by a person other than the applicant.

Higher risk dams must meet AT LEAST ONE of these:

  • are on a watercourse or water way (including a flood plain), or
  • have a maximum wall height of more than 10 metres, or
  • involve the clearing of more than 1ha of native vegetation, or
  • present a medium or high risk to people, infrastructure or the environment in the event of failure, or
  • on land subject to covenants, encumberances or owned someone not the applicant.

All proposed dams (both lower risk and higher risk) require a consultant or dam engineer to make an assessment of the dam safety category.

  Factsheet 1 - Building a Farm Dam   (1Mb)


Factsheet 2 - Contractor Responsibilities

Both lower risk and higher risk dams, as defined in the Building a Farm Dam factsheet has an associated Dam Works Code which describe the minimum construction standards that must be complied with. This factsheet contains some basic information on the Codes.

  Factsheet 2 - Contractor Responsibilities   (964Kb)


Factsheet 3 - Dam Safety Responsibilities

Once a dam has been completed and a Notice of Completion of Dam Works has been submitted there are ongoing monitoring requirements for the dam owner.

  Factsheet 3 - Dam Safety Responsibilities   (962Kb)


Factsheet 4 - Lower Risk Farm Dams

This factsheet provides more information on Lower Risk Farm Dams along with some detail on the process to submit an application.

  Factsheet 4 - Lower Risk Farm Dams   (1Mb)

Dam Works Codes

These codes include minimum construction standards that the dam owner is responsible for. Including:

  • maximum wall heights
  • minimum crest widths
  • upstream and downstream batter slope requirements
  • minimum spillway depths
  • minimum dry freeboard depths
  • minimum outlet pipe sizes

Find the codes at www.dpipwe.tas.gov.au/water/dams/dam-works-codes

Dam Works Permit Guidelines

These are a series of detailed guidelines that provide information on the process of obtaining a dam permit.

Go to www.dpipwe.tas.gov.au/water/dams/dam-works-permit-guidelines

Dam Works Assessment Decision Framework

This is a high level document that sets out the parameters for dam works assessment.

You can find it at www.dpipwe.tas.gov.au/water/dams/dam-works-assessment-decision-framework

Dam Works Application Forms

These are the forms that are required to be submitted for any dam works. It also includes lists of dam application and dam safey consultants, earthmoving contractors and a fees summary.

This information is available at www.dpipwe.tas.gov.au/water/water-management-forms




Contact

Water Enquiries
GPO Box 44
Hobart TAS 7001
Phone: 03 6165 3222
Email: Water.Enquiries@dpipwe.tas.gov.au

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