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We are writing to provide you with the latest information about our hospital addition construction project.

Activities for the Week of March 17
Trench work continues from Boren Avenue westward on Seneca Street toward the entrance of the John Winthrop Apartment building. Utility relocation ductwork will take place on Seneca and the sidewalk immediately in front of the Winthrop Apartments. This work includes the installation in the coming weeks of a large electrical vault, partly in the sidewalk, just outside the Seneca entrance to the Winthrop building.

The first four parking spaces on each side of Seneca, west of Boren, continue to be closed to facilitate this work and accommodate the routing of traffic onto Boren. Additional parking spaces along the north, westbound lane of Seneca may need to be closed, including a Zone 21 Permit Parking Load/Unload area, to ensure the safety of the public and workers on the site.

The construction of project headquarters in the parking area just south of the Baroness Apartments (1005 Spring Street) is nearly complete, and crews have begun using the offices.

Looking Ahead
Shoring activity on the site, along the west edge of Boren between Spring and Seneca, is slated to start March 24. More details will be included in next week's bulletin.

The trenching taking place this week along the north side of Seneca is in preparation for the installation of an electrical vault, which will affect the street and sidewalk on the north side of Seneca to the east side of the entrance to the Winthrop Apartments. At this time we anticipate the excavation and installation of the vault to take place late in the week of March 31, but possibly not until the week of April 7. Some further restoration will occur in the intersection of Boren at Seneca, which will be done Friday, March 14. We will be doing some saw-cutting in Seneca from the intersection up to the vault location on Monday, March 17.  

As previously reported, this work may require the removal of two trees along the sidewalk just east of the entrance to the Winthrop Apartments, a decision that will be made by the Urban Forestry Department of the Seattle Department of Transportation. If the trees have to be removed, they will be replaced with new trees upon completion of this work. Any questions regarding these trees can be addressed to the Urban Forestry Department at (206) 684-5693 or at

When this work is being done, we will ensure an open pathway is maintained at all times to allow residents of the Winthrop Apartments to enter and exit the building to the west. During non-construction hours, we will maintain a pedestrian path around the excavation area.

No work is planned for the weekend of March 15-16. Please note that we are planning to do some work on the weekend of March 22-23 on the existing hospital building to clear the way for the second phase of the shoring operation. It involves some concrete cutting and hoisting with a mobile crane. More information on this will be communicated in next week's bulletin.

Street Closures for the Week of March 17

  • Spring Street - Spring between Boren and Terry avenues will remain closed for now. Due to the construction traffic, removal of the median in Boren (as reported in last week's bulletin), and overall congestion and safety, it will remain closed for the next few weeks.

  • Boren Avenue - The outer southbound lane of Boren is closed and will remain closed throughout March. The inner southbound lane may be closed intermittently during weekdays as needed. Whenever both southbound lanes are closed, traffic control will allow one lane of travel in each direction on Boren. Depending on progress at the intersection of Boren and Seneca, there may be a closure of the northbound lanes of Boren. If that is the case, the lanes will be channeled to allow one direction of travel in each direction on the west side.

  • Seneca Street - The first four parking stalls immediately west of Boren on both sides of Seneca will be closed to parking due to trenching work on Boren and Seneca. One lane of traffic may be closed intermittently during this work, but the other will remain open to route bus and car traffic onto Boren.

Once again, we thank you for your patience throughout this period and apologize for any inconvenience these activities may cause. As updated information becomes available, we will be sure to share it with you.

As always, for more information about the addition, including an animated video of how the new building will be situated on the site, please visit:

If you have any questions, comments or concerns about the construction activities, please contact:

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