12th Avenue NE Road Closure/Water Shut Off: Water Main Replacement/Low Point Sump Pipe Installation

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As early as Tuesday, May 30th, Sound Transit’s contractor will be working with Seattle Public Utilities (SPU) to replace a portion of the 8” water main. This work will require SPU to shut off the water for the properties located on 12th Avenue NE between NE 58th and NE 55th street. SPU will be providing more details regarding the water shut off including when, who and duration. 

What to expect: 

May 31 – Jun 2 – Water Main Replacement

12th Ave NE work area for water main replacement

  • Traffic Impacts: 12th Ave NE Road Closure between NE 58th and NE 56th Street. Bicycle traffic will be temporarily rerouted to use the sidewalk during this work.  Parking will be removed at/near the work area.  Some driveways will blocked during the work hours (you will be contacted directly if you are affected).
  • Construction Activities: Crews will excavate the ground in the work area and install the 8” water line, then back fill the area. Crews will also install a new fire hydrant. The water shut off to residents will occur during this timeframe. As stated above SPU will provide the details on who will be affected.
  • Work hours: Monday – Friday 7:30 a.m. to 5:00 p.m.

Once this work is completed for SPU, Sound Transit’s contractor will begin the work of the light rail tunnel’s low point sump pump installation. The contractor will be installing the pipe that will connect the tunnel’s sump pump to the SPU drainage system. In order to complete this work there will be several temporary and complete road closures. This work will happen in three phases:

Phase 1, June 5 – 9 – Install Thrust Block

  • Traffic Impacts: 12th Ave NE Road closure (Local Access Only) between NE 58th and NE 56th streets during work hours.  Road will be opened at night to the current one lane configuration.  Bicycle traffic will be temporarily rerouted to use the sidewalk during this work.  Parking will be removed at/near the work area.  Some driveways will blocked during the work hours (you will be contacted directly if you are affected).
  • Construction activities: Crews will first excavate the ground in the work area, build the formwork for the thrust block and pour the concrete. There will be excavating, forming and pouring concrete. 
  • Work Hours: Monday - Friday - 7:30 a.m. to 5:00 p.m. 

Phase 2, June 12 – 18 includes the weekend – Install vertical pipe

  • Traffic Impacts: 24/7 road closure of 12th Ave NE between NE 58th and NE 56th streets. Bicycle traffic will be temporarily rerouted to use the sidewalk during this work.  Parking will be removed at/near the work area.  Some driveways will blocked during the work hours (you will be contacted directly if you are affected).
  • Construction Activities: Crane delivery and use of the crane in the work area to install the vertical pipe.  This work will also include welding.
  • Work Hours: Monday - Friday - 7:30 a.m. to 5:00 p.m.
  • Road will be closed 24/7 during this timeframe including the weekend of June 17 - 18.

Phase 3, June 19 – 23 – Connect low point sump pipe to the service main

  • Traffic Impacts: 24/7 road closure of 12th Ave NE between NE 58th and NE 56th streets during work hours. Bicycle traffic will be temporarily rerouted to use the sidewalk during this work.  Parking will be removed at/near the work area.  Some driveways will blocked during the work hours (you will be contacted directly if you are affected).
  • Construction Impacts: Crews will excavate, trench, install pipe then back fill. Noise and vibrations due to the compacting of the soil will occur.
  • Work Hours: Monday – Friday, 7:30 a.m. to 5:00 p.m.

Restoration: Permanent restoration will be carried out to the Seattle Department of Transportation standards. Current expectations for the permanent restoration is for spring/summer of 2017.