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 6

Enhance Reliability Two Substations — Loop System 7

Enhanced Reliability Two Substations — Loop System 8

Tillamook PUD Substations January 2015 9

Capacity Wilson River Substation 10

Capacity Wilson River Substation 11

Tillamook PUD Substations 12

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 16

Section Break 17

Route Evaluation Criteria • Must Have • Minimize • Maximize 18

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 22

Project Scope Project Scope 23 23

Evaluated Routes 24

Evaluated Routes 25