• Case Study: Whistler Water Distribution System Corrosion Study

  • Project Components:
    Planning, Conference Presentation, Water Supply
Case Study: Whistler Water Distribution System Corrosion Study
2016 BC Water and Waste Association (BCWWA) Conference

KWL's Siobhan Robinson made a presentation at the BCWWA conference in Whistler, BC.

Abstract

The Resort Municipality of Whistler (RMoW) identified potential internal and external corrosion in its water distribution system:

  • Internal corrosion concerns were based on the water chemistry of many of its 15 water sources, which have low pH and alkalinity levels.  These concerns were supported by high water loss in some areas of the distribution system along with complaints of green staining in other areas both of which can be indicative of internal corrosion.
  • External corrosion concerns were centred around known areas with hot soils. These concerns were supported by fitting failures that show signs of accelerated corrosion.

The RMoW retained Kerr Wood Leidal to determine the internal and external corrosion risks for its water distribution system and provide recommendations to mitigate these risks.  Internal corrosion risk was determined based on source water quality, pipe material and age, while external corrosion risk was determined based on soil conditions, pipe material and age.  Risk mitigation strategies were developed for both internal and external corrosion, and risk scorecards were developed to allow the municipality to identify the risk to its installed infrastructure.  Decision roadmaps were also developed to guide operations staff to the most appropriate mitigation strategy for each situation.

This presentation summarizes the work to date along with the work that is being completed to validate both the internal and external corrosion work using corrosion coupons and material collection, and inspection combined with soil and groundwater sampling.

 

Resources: 
Stream10_RobinsonS_05032016_PRINT.pdf (application/pdf, 1.722Mb)