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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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  • Transcript

    • 1. 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
    • 2. Sound Transit Capitol Hill Station Construction Noise and Project Update June 17, 2009 6:00 – 8:00 PM
    • 3. 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
    • 4.
      • 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
    • 5. 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
    • 6. Capitol Hill Station Schedule 1 2 3 4
    • 7.
      • 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
    • 8. 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
    • 9. 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
    • 10. I-5 Ramp Closures Pine Street Pike Street Detour info at www.soundtransit.org/u -link   
    • 11. 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
    • 12. 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
    • 13. Truck Haul Routes (beginning 2010)
      • High visibility crossing signs
      • Re-stripe crosswalks
      • Restrict parking at intersections
    • 14. 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
    • 15. 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
    • 16. Capitol Hill Station Construction Noise Variance for Nighttime Construction
    • 17. 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
    • 18.
      • 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
    • 19. Noise Mitigation Requirements Solid plywood construction screening wall between 8-16’ tall around site
    • 20. Stationary equipment (compressors, generators) enclosed in noise reducing material Noise Mitigation Requirements
    • 21.
      • 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
    • 22. Existing noise on 10 th Ave Existing noise on Broadway
    • 23. 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
    • 24. 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
    • 25. 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
    • 26. 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
    • 27. 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
    • 28. Questions?