Transmission Line Citizen Advisory Group January 27, 2015 1 - - PowerPoint PPT Presentation

Tillamook-Oceanside Transmission Line Citizen Advisory Group

January 27, 2015

1

Overview

• Purpose and Need
• Why now?
• General Design
• High-level concepts
• What we have heard
• How does that impact design?
• Brief History

2

Purpose and Need

• Keep the lights on
• Enhance reliability for customers in

central Tillamook County

• Allow for load growth
• Increase capacity; transfer some load to

Oceanside substation

• Replace aging equipment
• Enhance reliability

3

Definitions

• Capacity
• Ability to serve customers
• Highest loads occur on cold winter mornings
• Reliability
• Ability to keep the lights on
• What increases reliability?
• Multiple sources of adequate capacity
• Good design and maintenance practices
• Ability to respond and repair quickly

4

Enhance Reliability

Single Substation—Radial System

5

Reliability

Single Substation—Radial System

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Enhance Reliability

Two Substations—Loop System

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Enhanced Reliability

Two Substations—Loop System

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January 2015

Tillamook PUD Substations

9

Capacity

Wilson River Substation

10

Capacity

Wilson River Substation

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Tillamook PUD Substations

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Process for Siting Transmission Lines

• Identify substation locations
• Determines end points of transmission lines
• Identify potential transmission line routes
• Evaluate each route
• Regulatory criteria
• Utility criteria
• Public input
• Impacts
• Avoid
• Minimize
• Mitigate

13

Here’s What We’ve Heard… Addressing Visual Impacts

• Fewer poles are better
• Shorter poles preferred
• Minimize equipment attached to poles
• Locate poles as far as possible from Hwy 101
• Remove existing distribution poles,

where possible

• Consider undergrounding
• Minimize impacts to vegetation

14

Here’s What We’ve Heard… Addressing Impacts to Properties and Projects

• Minimize:
• Physical footprint of project on private properties
• Width of easement on private properties
• Redevelopment restrictions
• Disruption to landowner operations
• Maximize use of existing rights-of-way
• Roads, streets, railroad
• Minimize impacts to City and ODOT projects

15

Brief History

• Included in Long Range Plan – 1963
• Trask to Whiskey Creek route sited – mid 1990’s
• Included in Long Range Plan – 2005
• Included in 4-Year Construction Work Plan – 2007
• BPA changes source to Tillamook Substation – 2007
• First meeting with Tillamook City staff – 2008
• Public information meeting – August 2011
• City Planning Commission approves CUP – January 2013
• CUP appealed to Tillamook City Council – January 2013
• LUBA upholds City’s denial of CUP – January 2014
• Workshop with City Council and PUD Board – July 2014

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17

Section Break

Route Evaluation Criteria

• Must Have
• Minimize
• Maximize

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Evaluation Criteria - Must Have

• Meets project purpose
• Is siteable
• City of Tillamook, Tillamook County, Federal and

State Requirements

• Can be obtained
• Is buildable
• Must be able to operate and maintain in all but

the most severe conditions

• Critical infrastructure

19

Evaluation Criteria - Minimize

• Visual impacts
• Conflicts with existing land uses, structures, congestion
• Environmental issues
• Number of landowners and properties affected
• Effects on existing vegetation
• Need for special structures
• Space requirements
• Angle poles
• Co-location of circuits serving same geographic area
• Need for access roads

20

Evaluation Criteria - Maximize

• Co-location within existing linear corridors
• Use of existing rights-of-way and pole locations
• Constructability and accessibility for

maintenance during poor weather conditions

• Distance from existing structures, residences,

etc.

• Ability to obtain desired rights-of-way width
• Length of straight sections

21

Section Break

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Project Scope

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Project Scope

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Evaluated Routes

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Evaluated Routes

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