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Enbridge Gas Distribution Chris Moore P.Eng Manager Engineering Construction and Maintenance

AGA Distribution Best Practices Program System Regulation and Valve Maintenance Potential Roundtable Executive Presentation. Enbridge Gas Distribution Chris Moore P.Eng Manager Engineering Construction and Maintenance (416) 495-5222 chris.moore@enbridge.com.

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Enbridge Gas Distribution Chris Moore P.Eng Manager Engineering Construction and Maintenance

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  1. AGA Distribution Best Practices ProgramSystem Regulation and Valve MaintenancePotential Roundtable Executive Presentation Enbridge Gas Distribution Chris Moore P.Eng Manager Engineering Construction and Maintenance (416) 495-5222 chris.moore@enbridge.com

  2. Enbridge Gas Distribution Background Gas Distribution Metrics Enbridge Facility Map • Number of Customers = 1,960,378 • Miles of Main = 22,305 • Number of Services = 1,955,954 • Employees = 1,952

  3. Regulation Station Maintenance/Valve Maintenance Challenges • Aging workforce, with new employees to be trained to replace those retiring • Aging infrastructure • Congested Infrastructure • Traffic, Traffic, and more Traffic, and… • Its Canada….

  4. Valve Maintenance Unique Processes • % Maintained Valves Found In-operable 0.02% • Source: Only 6 valves were found inoperable, and 25856 system valves • Line valves on inspection program are visited either annually, or 5 yrs inspection cycle • Valves are cracked as part of inspection program, the small number of inoperable valves may be due to these valves not being cracked on a regular basis. • Major Valve repair project completed in 2004 (Bolt replacement) • All valves on pressure regulating stations are maintained as part of station maintenance by certified valve technicians.  Regular maintenance helps to prevent inoperable valves.

  5. Valve Maintenance Unique Processes • Number of Customers Per Maintained Valve - 76 • Source: Approx 1.9M customers and 26k valves on inspection program • In addition to valves that are part of stations and system isolation valves, system design policies require valves at laterals, station inlet/outlets, bridge/river crossings vertical subdivision. • Current perception within in the Company is that more line valves would be useful for emergency situations, therefore there is less resistance than in years past to installing additional discretionary valves

  6. Regulation Station Maintenance Unique Processes Unscheduled Visits Per Station: 0.04 • Relatively new station population. A significant rebuild program over the last 10 years, estimated 35% of district stations have been rebuilt • The frequency of scheduled maintenance inspections and operational inspections is based on the type of station and regulator;  certain regulator/station types have more frequent scheduled work which prevents unscheduled visits. • Additionally, if an issue is found during a scheduled station operational inspection, it is corrected at the same time, thus preventing an unscheduled visit. 

  7. Regulation Station Maintenance Unique Processes Labour Cost Per Station: $225 (avg. inspector salary divided by 350 stations per inspector) • Newer stations designed to reduce maintenance effort • Less time per station (e.g. replace axi-flow with top-entry regulators) • Less frequent maintenance per station (e.g. fewer stations with boot type regulators) • Over time, each reg inspector can become responsible for more stations • Program to replace stations in poor condition • Station Inspectors submit stations that are in poor shape – replace old assets before they start to generate trouble calls / unscheduled visits • Work divided by Geographic area and assigned to inspector (salaried) at year start • Geographic work areas minimizes travel time between stations (per station) • Maximize worker engagement through ability to schedule own work, also contributes to efficiency (planning work around weather conditions or proximity to maximize productivity) • Maintain productivity by monitoring monthly completion of work units (tracked in work management system)

  8. Highlights that would be included in Roundtable Presentation • Valve inspection program – frequencies and rationale • Valve maintenance strategy • ‘Highlights’ of our major valve repair project(s) • Certified Valve Technician Program - competencies and training • Valve installation standards • Station rebuild program • Risk based station inspection frequencies • Geographic work areas • Employee engagement and productivity efforts

  9. Questions

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