An Evaluation of Condition Assessment Protocols for Sewer Management

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TypeTechnical Report
Series titleClient Report. NRC Institute for Research in Construction
Physical description30 p.
Subjectcondition assessment, protocol, WRc, defect coding, condition grade, criticality and sewer management; Sewers
AbstractThis paper reviews various aspects of a condition assessment protocol developed by the Water Research Centre (WRc) and compares this protocol with guidelines developed by the National Research Council of Canada (NRC) and others used by Canadian municipalities and utilities. The report also discusses survey results from a number of municipal organizations, outlining the present condition of existing infrastructure, usages of condition assessment protocols, and costs for upgrading the ageing municipal infrastructure. A detailed comparison of defect coding systems, the assigned ?deduct? values for various types of defects, and condition grading systems for the different protocols are discussed. The report also compares maintenance priority rankings based on criticality and consequence of failure. An overall picture of inconsistencies in the field of sewer condition assessment has been drawn and the report stresses the need for an integrated, consistent condition assessment protocol for the prioritization of sewer repair and renewal.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number17232
NPARC number20377409
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Record identifier93ed3e91-be5e-452d-b79d-c20d4ac77002
Record created2012-07-24
Record modified2016-10-03
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