New construction/detour info for the Harbor/Spokane safety project from SDOT:

>As soon as tomorrow, Wednesday, June 13, crews will begin construction of the Harbor Ave SW and SW Spokane St Intersection Improvements project. This Neighborhood Street Fund project will increase the visibility and safety for people walking and biking across Harbor Ave SW and SW Spokane St. We expect construction to last about 6 weeks.

Nighttime and weekend work

One of the first construction activities will be pavement breaking at the intersection of Harbor Ave SW and SW Spokane St in preparation for safety improvement work on the Alki Trail. This work will be done at night and over the weekend to reduce impacts to people driving. For details about what to expect, please see below.

Traffic impacts:

Westbound SW Spokane St will be reduced to one lane of traffic at Harbor Ave SW, except during peak hours (3 PM to 7 PM, Monday through Friday), when it will remain fully open
A uniformed police officer will direct right turns onto northbound Harbor Ave SW from SW Spokane St during work hours
Crews plan to work continuously from 7 PM on Friday, June 15, to 5 AM on Monday, June 18
Sidewalks will be maintained for people walking and biking

Construction impacts:

Noise, dust, and vibration from breakers and heavy equipment
Increased truck activity, back-up alarms, and workers communicating in the field
Additional nighttime and weekend work may be required at this intersection
Crews have a noise variance for this work

Looking ahead:

Starting as soon as Monday, June 18, crews will begin safety improvement work on the Alki Trail. Crews will begin by replacing segments of the jersey barrier along the trail. Please note: This work may require a partial closure of the Alki Trail at the intersection of Harbor Ave SW and SW Spokane St. We’ll share more information on detour routes for people walking and biking as the work approaches.

What you need to know during construction:

Typical construction hours are Monday – Friday, 7 AM – 5 PM
Occasional night and weekend work
Temporary lane, crosswalk, and sidewalk closures
Detours for people walking and biking
Possible parking and loading restrictions
Please expect typical construction impacts such as increased noise, dust, truck activity, and vibration
Impacts and schedule are subject to change

Here’s the official SDOT construction notice (PDF).