Ask Your Mates Open Forum

Expand all | Collapse all

Stormwater Pipe Condition Assessment

  • 1.  Stormwater Pipe Condition Assessment

    Posted 04-12-2018 13:16

    Does anyone have a good rating system or template for assessing condition of stormwater pipes from CCTV footage? Any suggestions will be most welcome!
    Pro Cert 2

  • 2.  RE: Stormwater Pipe Condition Assessment

    Posted 05-12-2018 08:46
    Edited by Sean Rice 07-12-2018 10:32


    Pro Cert 2

  • 3.  RE: Stormwater Pipe Condition Assessment

    Posted 05-12-2018 12:40

    ​Hi Peter,
    waternz has this pipe inspection manual under which table 4.2 discusses about severity rating.

    Hope that helps.

    Kind regards,

    Manesh Malla
    Selwyn District Council

    Pro Cert 2

  • 4.  RE: Stormwater Pipe Condition Assessment

    Posted 05-12-2018 12:41
    I recommend use of the same assessment standards as is used for Sewers - Water Services Association of Australia, Conduit Inspection Reporting Code of Australia.  Be aware that the 2013 version is not valid and is being changed, I am still using the 2008 version until a new version is published.  This Australian standard provides the defect coding and grading system for gravity pipes and manholes.  There is a certification program for this standard that you should require all coding reviewers and operators to obtain.

    The standard reports provides structural and service condition grades by which priorities can be established.  While this standard does not normalise the results (per metre value whereby a long pipe with medium defects could get higher priority than a short pipe with a serious defect), I typically sort first by the worst defect (fracture, broken, collapsed, etc.) in the pipe segment and then sort by grade in order to overcome this issue.

    Hope this helps.
    Pro Cert 2

  • 5.  RE: Stormwater Pipe Condition Assessment

    Posted 05-12-2018 16:13
    Hi Peter,

    Representatives of IPWEA and the broader Australian storm water industry worked with the Water Services Association of Australia to have a "Scoring of Storm Water Drains" appendix added to the WSA05 - 2013 (V3.1) Conduit Inspection Reporting Code of Australia. It became Appendix D. The next revision of the code is still under way so the 2013 revision is still the most current version of the code.

    If you can code the CCTV observations in accordance with the WSA05 inspection code (there are some great Australian organisations that run WSA05 code training courses as their core business), per defect scores and subsequent conduit structural and service grades can be calculated in compliance with the code using commercial software. Some software will even validate your observations to ensure each one adheres to the WSA05 code and is therefore able to be scored.

    Please be aware that some software still does not support Appendix D scoring.

    WSA 05-2013 Conduit Inspection Reporting Code of Australia Version 3.1

    Best Regards,

    Toby Bourke
    VP Asia Pacific


    Pro Cert 2