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Northgate Link Project: Transmission Line Relocation Update

Northgate Link Project: Transmission Line Relocation Update. Haller Lake Community Club, March 6 , 2014. 16 miles of light rail with 13 stations currently in service University Link under construction; opens 2016 ST2 Plan funded extensions to Overlake, South King County, and Lynnwood

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Northgate Link Project: Transmission Line Relocation Update

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  1. Northgate Link Project: Transmission Line Relocation Update Haller Lake Community Club, March 6, 2014

  2. 16 miles of light rail with 13 stations currently in service • University Link under construction; opens 2016 • ST2 Plan funded extensions to Overlake, South King County, and Lynnwood • 54 mile system Link Light Rail System 2

  3. 4.3-mile light rail extension • Stations at U District, Roosevelt, and Northgate • Open for Service: 2021 • 62,000 daily boardings added to system by 2030 Northgate Link Extension 3

  4. Northgate Station Area Update • Portal construction underway; first tunnel boring machine (TBM) launched in late May/early June • Northgate Station design 90% complete; public open house on March 12th • Station and guideway construction begins in early 2016 • Early utility relocations in 2014-2015 4

  5. Public Involvement – December 5th Open House • Over 740 meeting notices delivered to residents within 1 block of proposed route • Project newsletter also sent to Northgate area residents • 31 people attended open house • Over 90 written comments since meeting 5

  6. Transmission Lines Conflict with Elevated Guideway 6

  7. 115kV Transmission Lines Relocation • Elevated guideway conflicts with SCL transmission line on 1st Ave NE • Alternatives east of I-5 considered; SCL conceptually approved Meridian Avenue N. & N. 115th Street route • Scope of transmission line relocation: • - relocate ~ 4,000’ of 115kV line • - install 13 new poles in street right-of-way • - taller pole height to avoid treeimpacts • - steel poles will replace some wood poles 7

  8. Initial concept shown on Dec. 5th • 7 existing wood poles to be replaced, mostly along N 115th St • - heights (75’ to 115’) • 5 new poles proposed along Meridian Ave N • - heights (110’ to 130’) 8

  9. Community Feedback • Poles out of character with residential neighborhood and not appropriate for non-arterial street: • Too tall • Too wide • Steel 9

  10. Design Modifications along N. 115th Street • Sound Transit in cooperation with Seattle City Light and Seattle Department of Transportation have modified the design along N. 115th Street: • Reduced Pole Heights (5 to 20 ft.) • Replaced Steel with Glued-Laminated (Glu-Lam) Wood Poles • Reduced Pole Widths 10

  11. Project Improvements • Modified 3 poles from steel to wood poles • Reduced heights along N.115th Street down to 95 feet (up to 20 foot reduction) • Modified pole placements to avoid utility conflicts 11

  12. N. 115th Street at Corliss Avenue N. Looking East MODIFIED EXISTING INITIAL

  13. 2100 Block – N. 115th Street EXISTING MODIFIED 13

  14. Summary Response to Community Feedback - Design Modifications on N. 115th 14

  15. Next Steps • Geotechnical Investigations – Summer 2014 • Final Design – Fall/Winter 2014 • Replace Poles – 2015 15

  16. Questions? 18

  17. For more information • Sign Up to Receive Email Updates • www.soundtransit.org/subscribe • Sound Transit Website • www.soundtransit.org/northlink • Contact Rhonda Dixon: • 206.398.5300 • northlink@soundtransit.org 17

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