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 Quick Facts Constructed: 1983 – 1985 Diameter: 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 Enbridge (NW) Pipeline System

4 Quick Facts Throughput: 30,000 BPD (4,800 m 3 /d) One shipper from Norman Wells to KP 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/m 3 –Pour Point = -50° Celsius –RVP < = 103 kPag –Viscosity = 2.0 cSt. Remote Operations from Edmonton Enbridge (NW) Pipeline System Aerial View of Norman Wells

5 “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 Design Environmental/ Geotechnical –Right of Way –trenching –slope stabilization

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

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 in Permafrost Geo-Pig

13 Maintenance Activity – Pipe Replacement

14 Maintenance Activities

15 Maintenance Activities to Present

16 Monitoring Activities

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

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