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Underground Transmission

Event Description and Agenda:

New transmission projects are being proposed, planned and built throughout the US and Canada and the reasons for going underground vary widely. In some cases going underground is necessary in order to bring a project to completion, based on public pressure or constrained space. Going underground with transmission has traditionally been a transmission owner's last resort because the cost of underground transmission is many times the cost of overhead transmission and maintenance and repair has proved costly and difficult. However, advanced cable technologies are being developed, installation techniques have expanded in terms of options and efficiency while cost factors have improved.

This conference will engage attendees in examples of recent underground projects and the challenges and lessons learned from those as well as technology advancements and challenges facing projects.

Thursday, January 21, 2016

8:00 - 8:30 a.m. :: Registration and Continental Breakfast Sponsored by Dewberry

8:30 - 8:40 a.m. :: Welcome and Opening Comments

8:40 - 9:30 a.m. :: Cost Saving through Precise Engineering

In the long run, precise engineering early on saves money, effort and project development unknowns. A higher emphasis on engineering can reduce environmental and installation costs while the size of the project can be reduced. This presentation will take you through an underground project explaining how this can be achieved.

Mohammad Khajavi, Underground Transmission Design Engineer, Los Angeles Department of Water and Power

9:30 - 10:30 a.m. :: The Fundamentals of Pipe Cable

This presentation will discuss the manufacturer, construction and operation of pipe cable. We will also discuss examples of re-conductoring.

Joe Zimnoch, Jr., Manager Application Engineering, The Okonite Company

10:30 - 11:00 a.m. :: Networking Break

11:00 a.m. - 12:00 p.m. :: Certifying Transmission and Subtransmission Cable Systems to Factory QC Standards

How do you certify that your new cable system meets the cable and accessory manufacturers' QC standards before your installer leaves the site?  How can you be sure that the system design doesn't enhance the risk of future failure?  How can you ensure that the systems you installed over 20 years ago are still reliable?  Follow utility case studies from design to installation to rehabilitation or replacement and learn the answers to these questions from your peers' experience.

Benjamin Lanz, Director, Applications Engineering , IMCORP

Jade Wong, Project Manager of Transmission R&D, ConEd

12:00 - 1:00 p.m. :: Group Luncheon sponsored by Underground Devices

1:00 - 1:45 p.m. :: 69kV HPFF Relocation in Philadelphia

A city-wide beautification effort required our Utility to relocate nearly one mile of a high pressure pipe-type cable system. This relocation required box-tunneling through congested city streets, installing new joint manholes and rebuilding a new terminal structure inside of our substation yard.

Dayton Duncan, Senior Engineer, PECO

1:45 - 2:30 p.m. :: A Review of North America's First 500kV Underground Project

This project will deliver renewable electricity from wind and solar generators from the Tehachapi Mountains in Kern County running southward through the Angeles National Forest and eastward to an existing substation in Ontario, CA. Southern California Edison will provide an update on construction status, costs, and challenges of this first 500kV underground first project while discussing the lessons learned from its progress.

James Sheftal, Senior Project Manager, TRTP 500 kV underground, Southern California Edison

2:30 - 3:00 p.m. :: Networking Break

3:00 - 3:45 p.m. :: A Case Study for Installation of a 115kV Underground Transmission Line in a Residential and Commercial Area 

A discussion of the data collection and analysis techniques used to permit, design, and install a double circuit 115kV underground transmission line in an urban area.

Dennis O'Reilly, Senior Manager, Sargent & Lundy LLC

3:45 - 4:45 p.m. :: Panel Discussion on the Challenges Facing Underground Projects


William Cook Jr., W.A. Chester, LLC.


Sandra Blain, Principal Manager, Major Projects Organization - Transmission and Distribution, Southern California Edison

Dayton Duncan, Senior Engineer, PECO

Frank Frentzas, Senior Engineer, ComEd

Mohammad Khajavi, Underground Transmission Design Engineer, Los Angeles Department of Water and Power

4:45 - 5:45 p.m. :: Networking Reception sponsored by Sargent and Lundy

Friday, January 22, 2016

8:00 - 8:30 a.m. :: Continental Breakfast Sponsored by Dewberry

8:30 - 9:15 a.m. :: ComEd Underground Transmission Projects Overview

This presentation will discuss ComEd's underground projects and review the lessons learned, challenges faced and opportunities for those to be applied in other projects. The engineering, routing, and installation in urban environments will be highlighted in a comprehensive discussion of these projects.

Frank Frentzas, Senior Engineer, ComEd

9:15 - 10:00 a.m. :: Advantages of AC Resonance Testing for Transmission Class Cable

This presentation will detail AC resonance testing and the advantages to doing this for transmission class cable. Detailed examples will be reviewed and the resulting benefits of technologies using Resonance test systems when combined with Partial Discharge diagnosis.

Hassan Younes, Kinectrics

10:00 - 10:30 a.m. :: Networking Break sponsored by The Okonite Company

10:30 - 11:15 a.m. :: 40+ Year Cable System Design Life - More than Initial Installation

This presentation will review recent projects of installation and Maintenance and the importance of design consideration to have a cable system last over 40+ years.

Lonnie Martinez, PE Principal Engineer, Xcel Energy

11:15 a.m.- 12:00 p.m. :: PSEG Underground Replacement Initiative

Beginning in 2009, PSE&G embarked on one of the largest reconductoring efforts of any utility in the country.  Launched from a simple TMM/TMB repair, and carried forward with the need for greater reliability, PSE&G has now reconductored approximately 35% of their system, with 5 more circuits planned through 2018.  This presentation will show the evolution of a simple splice rebuild project to one of the most aggressive re-conductoring efforts undertaken in the industry to date.  It will also highlight some of the projects with challenges and lessons learned for a successful transmission reconductor project.

Dennis Johnson, Senior Project Engineer, POWER Engineers

12:00 p.m. :: Conference Adjourns

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