Artboard 14

Alley & Harrison Street Undergrounding Update

March 21, 2016

The communication and City Light undergrounding work is progressing on-schedule. All of the trenching in the alley south of Harrison Street has been completed. This week, crews will primarily be working on finishing the remaining trenching in the alley north of Harrison Street.

In order to begin construction on the Cora Apartments, the overhead lines running east-west on the south side of Harrison Street need to be relocated to the north side of street to provide a safe working clearance for workers. To that end, in addition to the crews working in the alley north of Harrison Street, Seattle City Light teams will be working on Harrison Street to relocate the overhead power lines to the north side of the street. In an effort to minimize service disruption to the neighborhood, the new, temporary, lines on the north side of Harrison Street will be installed and energized prior to deactivating the lines on the south side of the street. Neighbors will not experience any service disruption. Work on relocating the overhead lines on Harrison Street is expected to be complete by April 4.

While Seattle City Light is working on relocating the east-west lines on Harrison Street to the north side of the street, crews will be preparing to move the overhead lines in the alley underground, into the newly build trench. Undergrounding in the alley will be completed with overhead lines completely removed by April 22. The following week on April 25, construction on the Cora Apartments will commence!

Undergrounding & Demo Update

March 07, 2016

Construction in the alley, adjacent to the future Cora Apartments at 19 W Harrison, is progressing well and on schedule. The building, which was formerly home of the Kaspars Catering Company, has been completely demolished and debris removed.

Crews have been working in the alley to underground the SCL and communication providers’ overhead lines since January 11, 2016. Before the overhead lines can be completely removed, the trenching infrastructure needs to be built for the conduit. The vaults for future service are installed and trenches are completed for the full length of the alley for Seattle City Light and are expected to be completed for the existing and future communication providers by March 11, 2016.

After the alley trenching is completed, the open trenches will be temporarily patched with asphalt until the final connections are made and the underground lines are live. After the final connection, the alley will be repaved in-kind.

Beginning March 14, 2016, the undergrounding work will splinter. Overhead service on the south side of Harrison Street will be temporarily relocated to poles that have been set on the north side of the street. In addition to the work on Harrison Street, trenching for the communication providers and Seattle City Light will continue across the street into the alley north of Harrison Street. The final terminus for the undergrounding is the northernmost power pole in the alley.

Relocation of the overhead power lines to the north side of Harrison Street is scheduled to be complete on April 7, 2016 thereby freeing us up to begin shoring and excavation for the Cora Apartments at 19 W Harrison Street. The permanent patching and undergrounding north of Harrison Street is expected to be completed soon thereafter.

Construction Look Ahead

January 29, 2016

The first full week of construction wraps up today and we are on schedule to start trenching on the south end of the alley first thing Monday morning. During this past week, we set two Seattle City Light vaults in the alley, which will service the new apartment buildings. The rain has been an obstacle, but February is shaping up to be a more mild and dry month.

In addition to the Seattle City Light trench, we will begin environmental abatement on the existing structure at 19 W Harrison Monday morning. Demolition for the structure is slated for the following Monday, 2/8.