Authors: Merrill, M. Steve; Lukas, Andrew B.; Hahn, Margaret A.; Palmer, Richard N.

Source: Proceedings of the Water Environment Federation, WEFTEC 2000: Session 1 through Session 10 , pp. 371-386(16)

Publisher: Water Environment Federation

Buy & download fulltext article:


Price: $17.50 plus tax (Refund Policy)


The sewer infrastructure of the US must be assessed and upgraded to meet the requirements of the EPA Sanitary Sewer Overflow Policy and the guidelines of the Government Accounting Standards Board Statement 34. Traditionally, age, size and material (brick and other pipe materials) have been the only factors used in prioritizing inspections and in predicting the timing of potential repair and replacement. This traditional approach is not sufficient and does not take into account a deeper understanding of the variables leading to structural or operational failure, or of the impact of failures on the community and the environment. All utilities face budget constraints that limit the ability to inspect and repair or replace sewer infrastructure. Smaller utilities may have little information about their infrastructure. A method is needed to prioritize the acquisition of information with which the sewers can be assessed and rehabilitation programs and budgets developed. The Water Environment Foundation contracted with Brown and Caldwell to develop a tool to help utilities prioritize inspection of sewers to overcome these constraints. The tool is based on an expert system developed by the University of Washington authors. The tools knowledge base was assembled from a group of national experts. Input from these experts was used to develop the tools logic assessing the need to inspect specific lines based on available information. In validation exercises using case studies supplied by the experts, the tool was shown to outperform a group of experts in quantifying the need to inspect.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864700784607488

Publication date: January 1, 2000

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • ingentaconnect is not responsible for the content or availability of external websites



Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page