Northern Pipelining & Practical Experience

1. Northern Pipelining & Practical Experience Presentation to: APEGGA April 21, 2005 Calgary

2. Topics • Enbridge (NW) Pipeline System Overview • “Northern” Pipeline Challenges and Successes • Maintenance and Monitoring • Inspection and Integrity Management • Reporting • The people that make it possible

3. Constructed: 1983 – 1985 Diameter: 323.8 mm Length: 869 km Design: Limit States Features: 140 defined water crossings 2 major rivers 150 significant slopes ambient temperature pipeline Design Pressure: 9930 kPa Inuvik Norman Wells Wrigley Ft. Simpson Zama Quick Facts Enbridge (NW) Pipeline System

4. Throughput: 30,000 BPD (4,800 m3/d) One shipper from Norman Wells to KP 839.2 Two shippers from there to KP 869 (Zama) Three (3) Pump Stations: 1 natural gas powered (NW) 2 diesel powered (WG & MC) Crude Characteristics: Density = 827 kg/m3 Pour Point = -50° Celsius RVP < = 103 kPag Viscosity = 2.0 cSt. Remote Operations from Edmonton Quick Facts Enbridge (NW) Pipeline System Aerial View of Norman Wells

5. Inuvik Norman Wells Wrigley Ft. Simpson Zama “Northern” Pipeline Challenges Unique “Northern” P/L Issues • Capital Cost • Geography and Remote Access • Permafrost Enbridge Experience Applied to Future Development • Proven sub-surface construction in permafrost • Proven methods of monitoring pipeline integrity

6. Norman Wells Successes: Design Innovation • Operating temperatures • Limit States Design • lower cost • strain limit 0.5% • Integrity monitoring

7. Norman Wells Successes: Permafrost Challenges Met • Design • Environmental/ Geotechnical • Right of Way • trenching Ice Rich

8. Norman Wells Successes: Slopes – Then and Now 1984 1997 • Design • Environmental/ Geotechnical • Right of Way • trenching • slope stabilization

9. Conventional pipeline design and construction Region requiring design consideration for permafrost Experience:Permafrost Area of sporadic permafrost that requires minimal pipeline design and construction considerations for permafrost Map and Diagram from Geological Survey of Canada website

10. Norman Wells Successes:Dealing with Ice • Design • Environmental/ Geotechnical • Right of Way • trenching • slope stabilization • thaw settlement / frost heave Ice lens

11. Inertial Inspection Runs – GEOPIG

12. Integrity Management inPermafrost • Geo-Pig

13. Maintenance Activity – Pipe Replacement

14. Maintenance Activities

15. Maintenance Activities to Present

16. Monitoring Activities

17. Annual Reports Operations & Maintenance Activities Condition of Pipeline Terrain Monitoring Slope Monitoring and Performance Operations & Monitoring Program Right-of-way Assessment Reporting to Regulators

18. Pipeline Maintenance • Hauling propane to remote area valve sites.

19. Field Personnel • Employees are permanent residents of the communities of Norman Wells and Ft. Simpson. • They provide significant contributions to the quality of life in the communities through their volunteer activities. • Successful and enduring positive northern relationships are built and maintained on the basis of mutual honesty, respect and trust.

20. Questions