If you expect to be using I-5 south of West Seattle in the late-night/early-morning hours tonight and/or tomorrow – heads-up about some Seattle City Light work that will bring lane/ramp closures:
City Light is working to increase the electrical capacity and reliability to the Duwamish Valley with the H-Frame Replacement and Feeder Installation Project. This project will impact traffic on I-5 with intermittent ramp closures, lane closures, rolling slowdowns and traffic detours and surface street closures between the West Seattle Bridge and S 188th St as workers remove transmission cable currently spanning across the highway.
City Light is replacing eight outdated H-Frame structures and cables that transmit electricity on high voltage lines across I-5 due to their age and increasing electricity demand. The project will improve system safety and increase electrical reliability for customers.
The construction work will occur during the hours of 9 p.m. to 5 a.m. on Sept. 7 (Sunday night into Monday morning) and Sept. 8 (Monday night into Tuesday morning).
The traffic impacts and restrictions for this project are necessary for motorist and worker safety. Drivers are advised to carefully obey the direction of the on-site uniformed law enforcement Officers, follow traffic detours and consider using alternate routes during construction.
Several I-5 north- and south-bound on-ramps within the traffic impact area will be closed intermittently during hours of construction, as well as surface street, exit and I-5 lane closures. Uniformed law enforcement officers will control traffic flow onto the interstate both Northbound and Southbound, and within the affected area (See Project Map).
Traffic will be reduced to one lane on SB I-5 in the vicinity of Exits 158 (Boeing Access Road) & 157 (Martin Luther King Way S)
Traffic will be reduced to three lanes on NB I-5 in the vicinity of Exits 157 (Martin Luther King Way S) and 158 (Boeing Access Road)
Intermittently closed on-ramps:
· S Columbian Way to I-5 SB
· West Seattle Bridge to I-5 SB
· Carlton Ave to I-5 SB
· Interurban Ave to I-5 NB
· Southcenter to I-5 NB
· I-405 Carpool to I-5 NB
· I-405 to I-5 NB
· S 188th St to I-5 NB
· Southbound Martin Luther King Jr Way S/SR 900 at Boeing Access Road (follow detour)
· Northbound Martin Luther King Jr Way S at S 129th St (follow detour)
· Boeing Access Road/Martin Luther King Jr Way S/Ryan Way S intersection to I-5 SB
· Northbound Martin Luther King Jr Way S to I-5 NB
· Northbound I-5 Exit 157 (to Martin Luther King Jr Way S/SR 900)
· Southbound I-5 Exit 157 (to Martin Luther King Jr Way S/SR 900)
· Northbound I-5 Exit 158 (to Boeing Access Road)
MONDAY UPDATE: City Light says this work was finished early and there will be NO second set of closures/changes tonight after all.
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