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Sound Transit 6/17/09 Noise And Construction Meeting
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Sound Transit 6/17/09 Noise And Construction Meeting

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Sound Transit 6/17/09 Noise And Construction Meeting Sound Transit 6/17/09 Noise And Construction Meeting Presentation Transcript

  • Agenda
    • 6:00 Open House
    • 6:30 Presentations
        • Welcome (Ron Endlich)
        • Project Overview (Michelle Ginder)
          • Construction sequence and activity
          • Construction Updates (ped safety, site walls)
        • Nighttime Construction Noise (Jeff Munnoch)
          • Noise Variance Process
          • Noise Impacts and Mitigation
          • Community Involvement and Next Steps
    • 7:15 Q & A
    • 7:45 Return to Open House
  • Sound Transit Capitol Hill Station Construction Noise and Project Update June 17, 2009 6:00 – 8:00 PM
  • Agenda
    • 6:00 Open House
    • 6:30 Presentations
        • Welcome (Ron Endlich)
        • Project Overview (Michelle Ginder)
          • Construction sequence and activity
          • Construction Updates (ped safety, site walls)
        • Nighttime Construction Noise (Jeff Munnoch)
          • Noise Variance Process
          • Noise Impacts and Mitigation
          • Community Involvement and Next Steps
    • 7:15 Q & A
    • 7:45 Return to Open House
    • 3.15-mile extension of Initial Segment and Airport Link
      • Capitol Hill Station
      • UW Station and crossover
    • Schedule
      • Design: completed
      • Construction: 6.5 years
      • System testing: 6 months
      • Open for Service: 2016
    • Adds 70,000 daily riders, 114,000 riders systemwide (2030)
    University Link
  • Capitol Hill Station
    • Underground station with 3 entrances
    • Staging area - station and tunnel excavation at site
    • Ridership: 14,000 daily boardings
    • Travel time:
      • 6 minutes to downtown Seattle (University St.)
      • 3 minutes to UW Station
  • Capitol Hill Station Schedule 1 2 3 4
    • Demolition and Remediation
    • Jan. 2009 to mid-2009
    • 75% Recycling and salvage goal being met
    • Construction trailers
    • Site will be lowered, paved and remain fenced
  • Recycled and Salvaged Items
    • A large amount of materials that otherwise would have been taken to landfills has been removed for re-use.
    • Recycled Demolition Material to Date: 2,890 Tons
  • 2. I-5 Undercrossing Work
    • I-5 undercrossing contract awarded in February
    • Prepares I-5 structures for future tunnel boring machines
      • Work being done now to avoid conflicts with other WSDOT freeway work and later U-Link contracts
      • Coordinated agency outreach to public on ramp closures
      • Contractor incentives to complete the work early
    Paramount Theater Convention Place Station PINE STREET BOREN STREET NB I-5 SB I-5 Work Area Work Area
  • I-5 Ramp Closures Pine Street Pike Street Detour info at www.soundtransit.org/u -link   
  • 3. Station Excavation, Tunneling
    • Jan. 2010 to Dec. 2012
    • Fenced work sites
    • Denny Way and parts of Nagle Place closed to traffic
    • Sidewalks open
      • Will be few short term closures
    • Single Tunnel Boring Machine (TBM)
    • 24/7 surface activity to support tunneling
    • High truck volumes
  • Construction Walls
    • Plywood walls will surround and screen main construction site perimeter 2010-2015
    • Wall Height:
      • 8 ft. tall along Broadway
      • 16 ft. tall along 10 th Ave
      • Transition from 8 to 16 ft. along northern (John St.) and southern borders
    • Contractor required to maintain fence (repaint annually, graffiti removal within 24 hours)
    • Appearance will include ST Art program elements, ST project information, and Capitol Hill business marketing elements
  • Truck Haul Routes (beginning 2010)
    • High visibility crossing signs
    • Re-stripe crosswalks
    • Restrict parking at intersections
  • SDOT Pedestrian Improvements
    • Crosswalk and warning signs on the east leg of Summit Ave and Denny Way
    • Curb bulb on the SW corner of E Denny Way and Boylston Ave.
    • Further options to improve the crossing of Olive Way at Boylston Ave. are under consideration
  • 4. Station Construction
    • Jan. 2013 to Dec. 2015
    • Less trucking activity
    • Sidewalks open
      • Will be few short term closures
    • Cut and cover pedestrian tunnel across Broadway (6 months)
      • Roadway remains open
      • Parking restrictions near work
  • Capitol Hill Station Construction Noise Variance for Nighttime Construction
  • Why must work occur at night?
      • Anticipate two years of 24/7 construction activity to support tunneling work at Capitol Hill site beginning in early 2011
      • Certain activities are required for tunnel worker safety
      • Maximizes project safety, efficiency, duration and cost
    • What goes on at night?
    • No high impact equipment (jackhammers, concrete saws, etc.)
    • Type of Equipment :
    • Tunnel ventilation fans, pumps, air compressors
    • Generators
    • Vehicles
      • hauling and delivery trucks
      • muck haul trucks
      • front-end loaders, backhoe
      • loaders, excavators
  • Noise Mitigation Requirements Solid plywood construction screening wall between 8-16’ tall around site
  • Stationary equipment (compressors, generators) enclosed in noise reducing material Noise Mitigation Requirements
    • Nighttime Truck Operations
      • No tonal back up alarms
      • Engine idle limit of 5 minutes
      • Haul trucks prohibited on 10 th Ave E during night hours
      • No compression brakes
      • Muck haul bins lined with noise dampening material
    Noise Mitigation Requirements
  • Existing noise on 10 th Ave Existing noise on Broadway
  • Nightime Noise Predictions Hourly night-time average 54 dba existing 65 dba construction + 0 to11 dba 65 dba existing 70 dba construction + 0 to 5 dba
  • Monitoring and Responding to Complaints
    • Continuous sound monitoring stations
    • 24 - hour construction hotline: 1-888-298-2395
    • Independent response by City Noise Abatement Specialist
    • City, ST and contractor will investigate, determine how to prevent future incidents, and respond back to caller
    • City review after 1 year
  • Capitol Hill Site Noise Variance
      • Requires application for Major Public Project Construction Noise Variance from City of Seattle
      • Noise variance establishes noise limits for contractor work between 10pm - 7am weekdays, 10pm - 9am weekends, holidays
      • Daytime construction activities will comply with City’s construction noise limits
  • Next Steps
    • Receive comments and questions tonight
    • ST to incorporate feedback into variance application
    • City of Seattle (DPD) will hold a public meeting to receive comments late summer
    • City will decide whether to approve a noise variance within 60 days after public comment is received
    • Contractor will prepare a detailed noise management plan
    • Follow-up information at meeting(s) later this year
    • Tunnel construction activities begin – early 2011
  • Staying Informed
    • Monthly electronic newsletters www.soundtransit.org /subscribe
    • Printed and electronic construction alerts
    • Regular construction update meetings
    • Full time outreach staff
    • 24 hour construction hotline 1-888-298-2395
  • Questions?