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Interurban Avenue South Project  

Project Overview:

The City of Tukwila has selected a Contractor and Construction Management firm to begin reconstruction of a portion of Interurban Avenue South from Fort Dent Way to S. 143rd Street. The $7.5 million project will include a new retaining wall to support the roadway adjacent to the Green River, extensive storm drainage improvements, new pavement, lighting, pedestrian facilities, landscaping and other improvements. Utility companies are relocating their facilities just ahead of construction to accommodate the roadway improvements.

The roadway construction work began in July and will last 12 to 16 months. Throughout significant portions of the work there will only be one lane of traffic in each direction within the construction zone. Access to local businesses will remain open during construction but some limited interruptions can be expected and access may be restricted at specific locations to accommodate the modified traffic patterns. Equipment noise, dust and other unpleasant consequences that are a normal part of the roadway construction process will be noticed but the contractor will do their best to limit these inconveniences. Through traffic moving between the I-405 and I-5 interchanges are encouraged to find other routes throughout construction. Speed limit in the construction zone is 25 MPH and will be strictly enforced. Please drive carefully and keep construction workers safe.


   

Project Update: December 2015

As we continue work to complete various construction activities on the west side of the roadway you may experience some inconvenience from the following upcoming activities in the near future. A summary of these activities is as follows:

General Construction and Traffic Information:

Traffic Movement

Two way traffic with one lane in each direction continues on the partially completed eastside of the roadway. Temporary striping and reflective barrels are being used for lane delineation. There is still a final lift of asphalt pavement to be placed on the road surface and the access covers for underground utilities have to be raised to the surface before permanent pavement markers can be installed. Speed limit of 25 MPH must be followed to protect workers and allow safe turning movements by vehicles into and out of driveways. Sidewalk work, landscaping activities and handrail installation will still occur on the eastside from time to time behind the new curb.

Westside Roadwork

Utilities: Seattle City Light has relocated their poles to facilitate the new improvements. They have also placed temporary streetlights on their new poles until the new street illumination system is installed. They still need to reconfigure the wiring on the new poles. Comcast, Century Link and other communication providers as well as PSE (gas and power) will be adjusting their facilities as needed to resolve conflicts prior to final paving.

Waterline: A new water main has now been installed along the entire length of the project individual water services are now connected to the new line, new fire hydrants installed and the old waterline taken out of service. THERE WERE SOME TEMPORARY SERVICE DISRUPTIONS DURING THE SWITCHOVER TO THE NEW WATERLINE AND WE APOLOGIZE FOR ANY INCONVENIENCE YOU MAY HAVE EXPERIENCED.

Storm drainage: The west side work is now complete with new catch basins and cross connections to the new storm sewer collection and treatment system previously installed on the eastside. The storm sewer system will not be fully functional until the final pavement surface is installed.

Concrete barrier: Concrete placement for sidewalk and barrier is completed on the south end of the project. The walkway has a concrete traffic barrier in the curve section to protect pedestrians from vehicles. There is also a precast concrete barrier along the steep hillside area to prevent debris from minor slides from covering the sidewalk. This barrier has not been installed yet but a minor slide that illustrates the barrier need has already occurred.

Sidewalk/Driveways: Curb and gutter placement is now complete on the west side of the project. The Contractor is now pouring the concrete driveways behind the curb and placing sidewalks along the length of the project– the contractor is moving from south to north.

Illumination System: The electrical subcontractor has poured bases and placed conduit for the new streetlights and is presently pulling wire to connect the system. The poles with luminaires should be placed within the next 2-3 weeks.

Paving: The base course of asphalt pavement has now been placed along the entire widened roadway section and a second “Pre-level” lift of asphalt was placed over most of the base course and most of the existing pavement. A final 2 inch wearing course of asphalt needs to be placed to complete the roadway paving and allow placement of permanent paint and pavement markings. This is very weather sensitive work and it is likely too late in the year to complete. Some other paving on side streets and behind driveways may occur if conditions allow.

Schedule

The project has been in progress for over 1 year and was originally scheduled to be completed in October. However, due to delays for a multitude of unexpected issues we are now into a period where the weather does not allow certain moisture and cold sensitive work to be performed. Although the contractor will do what work they can as conditions allow until the Christmas Holiday, it is likely there will be a winter shutdown and it will be spring of 2016 for final paving, landscaping and other finish work to be physically complete. We appreciate your continued patience as we work to complete as much of the project as possible before the end of the year.

December Construction Photos


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Project Update: October 2015

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As we continue work to complete various construction activities on the west side of the roadway you may experience some inconvenience from the following upcoming activities in the near future. A summary of these activities is as follows:

General Construction and Traffic Information:

Traffic Shift

Two way traffic with one lane in each direction continues on the partially completed eastside of the roadway. Temporary striping and reflective barrels are being used for lane delineation. There is still a final lift of asphalt pavement to be placed on the road surface and the access covers for underground utilities have to be raised to the surface before permanent pavement markers can be installed. Speed limit of 25 MPH must be followed to protect workers and allow safe turning movements by vehicles into and out of driveways. Sidewalk work, landscaping activities and handrail installation will still occur on the eastside from time to time behind the new curb.

Westside Roadwork

Utilities: Seattle City Light has relocated their poles to facilitate the new improvements. They have also placed temporary streetlights on their new poles until the new street illumination system is installed. They still need to reconfigure the wiring on the new poles. Comcast, Century Link and other communication providers as well as PSE (gas and power) will be adjusting their facilities as needed to resolve conflicts prior to final paving.

Waterline: A new water main has now been installed along the entire length of the project - the new pipe is tested and the line is active. Individual water services are now connected to the new line, new fire hydrants installed and the old waterline taken out of service. THERE WERE SOME TEMPORARY SERVICE DISRUPTIONS DURING THE SWITCHOVER TO THE NEW WATERLINE AND WE APOLOGIZE FOR ANY INCONVENIENCE YOU MAY HAVE EXPERIENCED. Minor service outages may still occur as final adjustments are made to the connections. If you will be affected by a short outage the contractor will be in touch prior to the outage.

Storm drainage: The west side work is almost complete with new catch basins and cross connections to the new storm sewer collection and treatment system installed on the eastside. The storm sewer system will not be fully functional until all the curb and gutter is installed on the west side and the final pavement surface is installed.

Concrete barrier: Concrete placement for sidewalk and barrier is proceeding on the south end of the project. The walkway has a concrete traffic barrier in the curve section to protect pedestrians from vehicles and also a concrete barrier along the steep hillside area to prevent debris from minor slides from covering the sidewalk. We expect the installation of these features to continue through the end of October on the west side and into November on the eastside.

Curb/Gutter/Driveways: Grading and curb placement has begun on the west side of the project – the contractor is moving from south to north. The curb placement is critical to allow paving to take place before the end of the month. Driveway and sidewalk construction will sequence in from south to north following curb placement.

Schedule

The project has been in progress for over 1 year and was originally scheduled to be completed this month. However, due to a multitude of unexpected issues it is likely to take another 8-10 weeks before it is substantially complete and into 2016 for landscaping and other finish work to be physically complete. We appreciate your continued patience as we work to complete as much of the project as possible before the end of the year.


Project Update: August 2015

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As we work to complete various construction activities on the west side of the roadway you may experience some inconvenience from the upcoming activities in the near future. A summary of these disruptions is as follows:

General Construction and Traffic Information:

Traffic Shift

Traffic has been shifted to the partially completed eastside of the roadway. Temporary striping and reflective barrels are being used for lane delineation. There is still a final lift of asphalt pavement to be placed on the road surface and the access covers for underground utilities have to be raised to the surface before permanent pavement markers can be installed. The road is still one lane in each direction. Speed limit of 25 MPH must be adhered to protect workers and allow safe turning movements by vehicles into and out of driveways. Sidewalk work and landscaping activities and handrail installation will be occurring on the eastside from time to time behind the new curb.

Westside Roadwork

Utilities: Seattle City Light is relocating their poles to facilitate the new improvements. They are also placing temporary streetlights on their new poles until the new street illumination system is installed. Comcast and other communication providers as well as PSE (gas and power) will be adjusting their facilities as needed to make way for new storm sewers and waterline.

Waterline: A new water main is being installed along the entire length of the project. Once the new pipe is tested the line will shifted to active status, individual water services will be connected to the new line and the old waterline taken out of service. THERE WILL BE SOME TEMPORARY SERVICE DISRUPTIONS DURING THE SWITCHOVER TO THE NEW WATERLINE. Most of these new waterline connections will take place at night to minimize disruptions. The majority of the transition work is presently scheduled for the week of August 17-20. If you live or work within the project boundary and your service will be affected, you can expect a more formal and specific notice (through the Tukwila water department notification procedure) as we get closer to the final cut over. We also emphasize that the cutover procedures can be complicated by potentially inaccurate system information as the old waterline is over 50 years old and surprises can happen. Some portions of the system outage may affect the same businesses for multiple nights while we work through the intricate sequence of making the cut overs and getting the new lines transferred to the final locations. We will make every effort to have the water mains active during daytime work hours (except for some short term transition outages of two hours or less) and our current plan is to complete all permanent transfers/connections before the end of August.

Storm drainage: The west side work is proceeding with new catch basins and cross connections to the new storm sewer collection and treatment system installed on the eastside. The storm sewer system will not be fully functional until all the curb and gutter is installed on the west side and the final pavement surface is installed. Concrete barrier: Grading has begun for the concrete sidewalk on the south end of the project. The walkway will have a concrete barrier in the curve section to protect pedestrians from vehicles and also a concrete barrier along the steep hillside area to prevent debris from minor slides from covering the sidewalk. We expect the installation of these features to continue through the end of August and into September.

Concrete barrier: Grading has begun for the concrete sidewalk on the south end of the project. The walkway will have a concrete barrier in the curve section to protect pedestrians from vehicles and also a concrete barrier along the steep hillside area to prevent debris from minor slides from covering the sidewalk. We expect the installation of these features to continue through the end of August and into September.

Schedule

The project has been in progress for over 1 year and is expected to take another 3-4 months before it is substantially complete. We appreciate your continued patience as we work to complete the project before the end of the year.

August Construction Photos


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Project Update: July 2015

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As we work to complete various construction activities on the west side of the roadway you may experience some inconvenience from the upcoming activities in the near future. A summary of these disruptions is as follows:

General Construction and Traffic Information:

  • Utility work: The new water main along the west side of the roadway is now being constructed. The work was started at the south end of the project at Fort Dent way during the evening and progressed to the north to 149th Street. The crew is currently preparing the water tie-in connections at 149th Street and service connections to the businesses along the west side of the roadway. Work will continue during the day and progress from 143rd St south to 149th Street.
  • River Bend Retaining Wall: The wall support panels are in place and the final wall backfilling is complete. There is still significant work to be done on the top of the wall in the months ahead including a concrete wall "cap", sidewalk, pedestrian handrail and concrete vehicle barrier. This work will continue once the west side sidewalk and slide barrier is complete and the traffic can be shifted into the middle of the roadway. More information on this schedule will be provided when we approach that work.
  • Interurban Traffic: The traffic was switched to the east side of the roadway during the 1st week of June and traffic appears to be moving through the work zone for the most part unimpeded. The intersection of 149th Street S. and Interurban Ave. S. will undergo traffic revisions until the water main utility tie-ins and storm drainage work is complete. One way traffic will be maintained at 149th Street during the revisions and flaggers will control access during work hours when the cross street is down to one lane. Full access will be provided during non-work hours. Any traffic revisions will be appropriately signed or directed by project personnel.
  • Special Impacts: The night work at the Ft. Dent intersection is complete for the time being. Additional utility and roadway paving work is scheduled for August. Noise and additional traffic revisions can be expected at that time. Also, since there is only one access point, work at 149th will result in special inconvenience to residents that live in that area. We appreciate your continued patience as we work through a very congested area of work.
  • Upcoming Water Outages: We expect several water main tie-ins along Interurban to cause short term water outages as we complete the cross over to the new system. You can expect notification of the outages prior to the work. We are currently working through the details with the contractor to determine which of these outages occur during the day and which will be restricted to night time only. Most main outages are expected to last around 4 hours although some may last longer. Following the main tie-ins there will be much shorter duration outages (1-2 hours typically) where the service lines are cut over to the new main. These will affect individual properties on the west side of Interurban between Fort Dent and 143rd Street and individual properties will be informed of this schedule as they approach. The only east side property to be affected by the outages should be the Southcenter Plaza building at 14900 IU.
  • Upcoming Power Outage: As we work to relocate the overhead power poles on the west side of Interurban there will be a short duration power outage for the residents at Canyon Estates. This outage will be coordinated with Seattle City Light's pole work and the other project features that drive the relocation. Notice of the outage should be provided by Seattle City Light. There is also the possibility of a short term power outage on the PSE system when we install additional storm drainage features on the west side of IU. This outage (if necessary) will be coordinated by PSE Power.

Project Update: June 2015

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We are nearing a significant milestone in our effort to complete the project. As you may have noticed through various flyers and other announcements, our contractor has been pushing to shift the work zone from the east side of Interurban to the west for the last several weeks. As the deadlines for this transition continue to slide we have attempted to complete as much of the east side improvements as possible prior to the transition.

While we hope to have many of the construction items on the east side complete before we open up a new area to construction, not all work will be complete prior to the shift and we will continue to work on the east side as time and access allows, even as we pursue other work. In the near term there will be several items that could cause disruption to local businesses and residences. A summary of these disruptions is as follows:

General Construction and Traffic Information:

  • Traffic Shift is Imminent – After several attempts to set a date for the traffic shift from east to west we believe we are on target to complete the shift the middle of this week (the afternoon of Wednesday, June 10th is our current plan). This will mean a new traffic pattern through the project with one lane in each direction on the east side of Interurban Ave and the work zone shifted to the western most two lanes. The business access point may be consolidated in specific locations during specific construction activities however access will be maintained to all businesses and residences at all times.
  • West Edge Roadway Removal – One of the first major activities in the west side work zone will be the removal of a significant portion of the west edge of the roadway where various utilities and sidewalks will be replaced with this project. We expect to perform these removals with a combination of roadway grinding and demolition equipment. Once the roadway material has been ground out Walsh will replace the roadway surface with some of the asphalt grindings to provide a passable route to each business and/or residence. These routes will be maintained until the final project improvements are in place.
  • More Utility Work – With the establishment of the west side work zone we will launch into the next phase of utility relocation and coordination. This coordination will be primarily with Seattle City Light overhead power and CenturyLink relocations but it may also involve PSE gas, PSE power and a few other minor utilities. We do expect one or more minor outages at different stages of these transitions but the utility performing the work should provide notice if your business will be affected through the standard outreach channels. Please Note - The overhead Seattle City Light power lines on the west side of IU only serve the large apartment complex on top of the hill at Fort Dent so all other west side business and residential/apartment complex tenants should be unaffected by their work. If you observe an issue with a contractor that appears to be a private utility (CenturyLink, Comcast, PSE, etc.) you can contact those companies directly or you can notify our construction office and we can help determine whether the issue can be addressed through our normal project coordination.
  • New Westside Water Line - The first utility installation to be performed by Walsh as part of the west side work will be the replacement of the old waterline along IU. As segments of this line are replaced, tested and placed in service each existing service connection will be transitioned to the new line. These transitions will require short duration water outages and Walsh will coordinate each of them with the local businesses or residences in advance of the work. We expect this work to be ongoing for the next few months.

Specific Location Disruptions

  • Immediate Impact to Businesses east of Interurban on S144th – In an attempt to complete the east edge tie-in before the traffic shift Walsh will be working extensively in the 144th work zone immediately east of IU and down to the bottom of the hill just east of the old Maul Avenue for the next few days. You can expect restrictions in traffic through the work zone to be controlled by appropriate flaggers as they complete the trench patches, final paving and utility lid adjustments, however access will be maintained throughout these construction activities. This work is expected to be completed by the end of this week and we hope to have most of the major roadway restoration in this area completed prior to the shift to the west side work zone. There will be some remaining work up near the sidewalks and along the east edge of Interurban but this work should not appreciably restrict access to 144th.
  • Apartment Complex residents west of Interurban at 149th – One of the earliest and most disruptive portions of the utility work will affect the access up 149th west of Interurban. Through current contract requirements, Walsh must perform a significant portion of this work at night but they are investigating ways to provide an alternate access at the base of the hill to allow more of this work to occur during daytime hours. There is a significant amount of work at this location in a very congested work zone so the disruption will likely last for some time however, regardless of the time of work, access will be maintained for residents up the hill on 149th.
  • Nighttime utility work from Fort Dent to 149th – A portion of the utility work to be completed in the month of June will be performed at night. This work will begin at Fort Dent and will continue to the north. While Walsh is currently working under a noise variance that allows this work to take place after normal working hours we will likely be seeking an extension to that variance to perform more of the work off hours. It is our hope that this will speed the construction and further limit the impact to local businesses within the project limits. If you live or work within the project boundary you should look for this notice and provide your comments to inform this process.

June Construction Photos


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Project Update: May 2015

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The following is an update concerning construction activities that are anticipated in the near future associated with the Interurban Roadway Improvement project.

As we work to complete various construction activities on the east side of the roadway you may experience some inconvenience from the upcoming activities in the near future. A summary of these disruptions is as follows:

General Construction and Traffic Information:

  • Curb, Sidewalk and Driveways: Final grading and concrete placement is being performed on the east side of the roadway to form the new curb line, driveway locations and pedestrian sidewalks. This work also includes adjusting the storm drainage system curb inlets at the face of the curb. Surface planing of the existing old pavement surface and a layer of asphalt to “level” the roadway prior to traffic switch will be performed following the curb placement. Some driveways will need to be closed temporarily to complete this work but access will be facilitated at another driveway opening.
  • Street Lighting/Electrical: Many new light poles are in place on the east side of the roadway and are now operational. Concrete light pole foundations continue to be placed for additional light poles.
  • Utility work: Switching traffic from the west side of the roadway to the east side will allow Seattle City Light and other utilities to place new poles along the west side of the roadway and make new overhead connections necessary to remove the old poles. The switch will also allow the contractor to start work on the new waterline. The waterline and utility work will result in some temporary service disruptions as individual services are transferred from old to new.  
  • River Bend Retaining Wall: The wall support panels are in place and the final wall backfilling is occurring. There is still much work to be done on the top of the wall in the months ahead before it is complete including a concrete wall “cap”, sidewalk, pedestrian handrail and concrete vehicle barrier.
  • Interurban Traffic: Delays in completing the eastside work has resulted in the need to move back the date planned for the switch of traffic from the west side to the east side. Originally scheduled for May 11, the date for the traffic switch is now expected to occur on or about June 5th. This change date will be provided to drivers via a roadside message board for one week prior to the switch. It also involves some changes to the signal operation at the Ft. Dent intersection in coordination with WSDOT. Signage, pavement markings and delineation with traffic barrels will be very much like the current set-up but on the opposite side of the roadway.
  • Special Impacts: The need to work at the Ft. Dent intersection and to minimize traffic impacts will require some work being performed at night. Noise and additional traffic revisions can be expected. Also, since there is only one access  point, work at 149th will result in special inconvenience to residents that live in that area.

Project Update: April 2015

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The following is an update concerning construction activities that are anticipated in the near future associated with the Interurban Roadway Improvement project.

As we work to complete various construction activities on the east side of the roadway you may experience some inconvenience from the upcoming activities in the near future. A summary of these disruptions is as follows:

General Construction and Traffic Information:

  • Storm Detention Vault north east of 149th/IU – The contractor is finishing the storm water piping connections at the storm water detention vault and completing final waterproofing and backfilling of the structure after all waterproofing materials have cured properly. The old drainage swale north of the new Vault has now been mostly filled and compacted.
  • Utility Work and Roadway Paving – One significant milestone reached in the past month was the start of repaving, with almost 700 tons of new asphalt pavement placed over the new central storm drain line. Along with old pavement removal and new storm drain installation along the east side of Interurban, roadway paving operations are still continuing intermittently from S. 143rd Street south past the Southcenter Plaza building. Sidewalk and/or curb & gutter construction is also expected to commence soon. There may be some temporary disruptions and limited access during pavement restoration. Temporary traffic revisions in the South 147th and South 149th intersection areas will be ongoing until the roadway utility trench pavement is fully restored– SO PLEASE CONTINUE TO WATCH OUT IN THE AREA BETWEEN MAZAK, THE COFFEE STAND, AND AMERICAS BEST VALUE INN and the Southcenter Plaza Building. Thanks for your understanding!
  • River-bend Soldier Pile Retaining Wall – The Soldier Pile Wall also marked a significant milestone in the past few weeks with completion of pile installation. There will be a brief pause in Wall construction as the wall panels are fabricated, then wall panel placement will get underway.
  • Interurban Traffic: Traffic along Interurban Avenue South continues to be restricted to one lane each way from S 143rd Street to Fort Dent Way. Work has continued to complete the storm drainage utility installation, new street lighting system and curb, gutter and sidewalk on the east side of the roadway, in anticipation of a temporary traffic control traffic shift later this year, currently scheduled for early May!

April Construction Photos


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Project Photos

 
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Contact Information:

Contractor: Walsh Construction, LLC
Project Designer: KPG, Inc.
Construction Management Contact: Bud Whitaker, Anchor QEA
City Project Manager: Mike Ronda

 

Contact Information:

Public Works
Administration

6300 Southcenter Blvd.,
Tukwila, WA 98188

Phone: 206 433-0179
Fax: 206 431-3665

Email the Public Works Dept.