Journal article

Condition Rating Model for Underground Infrastructure Sustainable Water Mains

Al-Barqawi H, Zayed T ...see all

Journal of Performance of Constructed Facilities, vol. 20, issue 2 (2006) pp. 126-135

  • 35


    Mendeley users who have this article in their library.
  • 74


    Citations of this article.
  • N/A


    ScienceDirect users who have downloaded this article.
Sign in to save reference


One of the greatest challenges facing municipal engineers is the condition rating of buried infrastructure assets, particularly water mains. This is because water mains are typically underground, operated under pressure, and usually inaccessible. Condition rating is a mandatory process to establish and employ management strategies for any asset. To assess the condition of water mains, current research considers physical, environmental, and operational factors and their effect on different types of mains (i.e., cast iron, ductile iron, and asbestos). A condition rating model is developed to assess and set up rehabilitation priority for water mains using the artificial neural network (ANN) approach. Data are collected from different municipalities to train the developed model. The ANN input factors incorporate pipe type, size, age, breakage rate, Hazen-Williams factor, excavation depth, soil type, and top road surface; however, the output is pipe condition. The trained ANN shows robust performance (learning rate=0.005. R-2=0.931, correlation coefficient r=0.9653). Results show that the breakage rate has the highest relative contribution factor among the others. The developed model is relevant to researchers and practitioners (municipal engineers, consultants, and contractors) in order to prioritize pipe inspection and rehabilitation planning for existing water mains.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Hassan Al-Barqawi

  • Tarek Zayed

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free