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We are writing to provide you with the latest information about our hospital addition construction project and the timing of the demolition of the Northcliffe building on the corner of Boren Avenue and Seneca Street.

On Saturday, Jan. 26, a vacuum truck was parked on Seneca to complete soil removal necessary for the installation of two support poles to hold the relocated trolley wires. The city of Seattle requested this work be done over the weekend because it would block one lane of Seneca and require the city to put temporary diesel bus routing in place. 

We have learned that the truck was quite noisy and disruptive to neighbors. Please accept our apology for the lack of advance notice in this instance. We are working diligently with our construction teams to learn as much about such disruptive activities as early as possible to give our neighbors adequate notice. According to Skanska Construction, no activities are planned for this weekend, Feb. 2 and 3.    

The tentative dates for the demolition of the Northcliffe are Feb. 23 and 24. The demolition contractor plans to mobilize equipment onto the site the week of Feb. 11. The surface parking lot and garage (the old Hudson Arms garage) will be removed soon thereafter.

During the week of Feb. 4, we are on schedule to complete the relocation of Metro trolley lines off the Northcliffe onto new support poles. There will continue to be intermittent lane and sidewalk closures on the south side of Seneca, between Boren and Terry Avenue, through approximately Feb. 5, when we anticipate this work to be completed. 

Also during the week of Feb. 4, we plan to continue the relocation of the underground utilities. When this work is under way, there will be intermittent closures on Spring Street. We will provide more information on this as we progress. As shoring and excavation activities progress, Spring will be permanently closed between Boren and Terry for the duration of the construction. The closure date will be communicated as soon as we have that information.

Installation of the construction offices began the week of Jan. 21 and construction trailers were hoisted in place Jan. 26 and 27. This work will continue until completed in February. The offices will be located in the parking area just south of the Baroness Apartments (1005 Spring Street). This involves setting up two large mobile office trailers and a deck connecting them.

Preparations are continuing on the existing hospital to separate it from dependence on the alley. This work is primarily internal but includes construction of a new temporary exit stairway from the seventh floor roof terrace down to the ED sidewalk. When this is complete the existing stair exits out onto the alley will be permanently closed.

Please understand that the intended dates for many of these activities are contingent on the completion of the utility and electric bus duct relocations. They may change if we run into unforeseen site conditions that would delay this ongoing work.

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

As always, for more information about the addition, please visit:

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

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