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

Weekend Work: Saturday, April 26
Due to unforeseen conditions encountered during excavation, a special permit has been obtained to allow work at the construction site on Saturday, April 26. Between 9 a.m. and 3 p.m., a vacuum truck will be parked on the south side of Seneca Street between Boren and Terry avenues to flush an underground fuel tank discovered on the site. No work is planned for Sunday, April 27.

Activities for the Week of April 28
Drilling and installation of 80- to 85-foot steel piles will continue this week along the west side of the worksite. The steel piles along the south, east and north sides have been installed, and excavation is under way. A conveyor will be set up this week on the site to load trucks at Boren for hauling soil from the excavation. This will increase truck traffic in and out of the site during normal construction hours (weekdays from 7:30 a.m. to 6 p.m.). We expect drilling activity to last into May and excavation work to last into August.

This week, we will return to working on the electrical vault immediately in front of the John Winthrop Apartment building to connect it to utilities under the street from Seneca and Boren, then further west approximately 80 feet to an existing vault.

We will also continue working in the alley south of Spring Street, installing the electrical duct bank between the new vault on Spring and an existing one in the alley. The crane used to set the electrical vaults on Seneca and Spring will be loaded and hauled away the evening of Wednesday, April 30, after 6 p.m. due to Seattle Department of Transportation (SDOT) traffic restrictions. We expect this work to be finished by 7 p.m.

Sidewalk and Street Closures for Week of April 28

  • Spring Street - Spring and its north sidewalk between Boren and Terry will be closed 24 hours a day. The south sidewalk on Spring between Boren and Terry will be closed during the work day and open during evenings. When the sidewalk is closed an alternate route will be in place, clearly marked with pedestrian signage and by flagging personnel directing pedestrian traffic. The alley west of the Chasselton Apartments will be closed, but allowances will be made for tenants to get in and out of the Chasselton parking garage. There will be inconveniences at times.

  • Boren Avenue - The westward southbound lane on Boren between Spring and Seneca will be closed during normal construction hours and will be open after construction hours. The sidewalk will be closed 24 hours a day.

  • Seneca Street - For the time being, the south sidewalk on Seneca between Boren and Terry will be closed. The sidewalk will be open this week on the north side throughout the utility connection work on the Seneca vault. Building access for Winthrop residents will be maintained at all times.

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

Crane Safety
We wanted to provide you with information about the crane safety measures that will be taken at our construction site. In August or September, we plan to erect a 240-foot construction crane at the site, which will be installed at full height and anchored within a very large and secure concrete slab. By installing the crane at full height from the beginning, it will not be "jumped" - or jacked up to raise its height - later on. Use of the jumping technique was a factor in crane accidents that were featured recently in the news.

The crane will be placed near the center of the site in a north-south configuration and approximately 15 feet from the existing hospital. The base will be 65 feet below Boren; the top of the crane will clear all surrounding buildings.

Virginia Mason is adamant about requiring the highest crane safety standards be enforced. General contractor Skanska will maintain a comprehensive safety management system that meets or exceeds existing guidelines for the site. Skanska ensures the stability and soundness of all its cranes by adhering to strict industry standards and engineering in setting up the cranes. Skanska has regular monthly inspections conducted by independent third-party crane specialists. It hires all of its crane operators from the operators union, which requires them to pass the OSHA-approved crane operators course. Further, Skanska evaluates site subcontractors' safety programs to ensure they are up to standard.

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.

For more information about the addition, including an animated video showing the new building's orientation on the site, please visit:

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

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