Skip to main content

Washington State Route 599

Washington State Route 599 is a 1.75 mile freeway entirely contained within the City of Tukwila located in King County.  WA 599 is a north/south route connecting I-5 to WA 99 and is former alignment of US Route 99.






There isn't much to WA 599 as a route but there are some neat signs like this WA 599 "Begin."





The Light Rail from SeaTac International Airport crosses above WA 599 near Marginal Way.





There are only two exits on WA 599; the first is at Interurban Avenue while the second is at Tukwila International Boulevard.  Tukwila International Boulevard is another former alignment of US 99 which predated the freeway WA 599 runs on now.





North of Tukwila International Boulevard the route becomes WA 99 and WA 599 ends.  There is a much better sign assembly explaining the change south of this one but I wasn't expecting it and missed the photo.




Interestingly there is a gap in WA 99 from WA 518 north to the terminus of WA 599 which is spanned but Tukwila International Boulevard.   The routing of what is now WA 599 was constructed in the late 1950s and was part of Primary State Highway 1 WM (West Marginal).  When the route was completed US 99 switched alignments apparently onto a multiplex of I-5 and may have been once been signed as US 99T.  The route has been designated at WA 599 since 1971.  This older map of the state highway system from 1956 shows how US 99 used to flow through from Tacoma through Seattle before the construction of I-5.

1956 Washington State Highway Map

Edit 5/13/18:  I was shown a 1970 map scan of downtown Seattle by Flickr user Arthur Allen showing the routing of WA 599 shown as WA 99T.  The map scan can be viewed here at the following link:

Arthur Allen Flickr Page showing a 1970 Map Scan of downtown Seattle

Comments

Popular posts from this blog

Trans-Sierra Highway Passes; Sherman Pass Road and Signed County Route J41

Probably the most unique Trans-Sierra Highway Pass I encountered in 2016 was the only one that isn't a State Maintained Roadway; Sherman Pass Road and Signed County Route J41.






Getting to Sherman Pass Road requires traveling deep in to Sequoia National Forest.  From the western Sierras the easiest routes are from California State Route 190 or from Signed County Route J22 east of CA 99.  When I was on my way to Sherman Pass I ended up taking J22 in Tulare County from CA 99 east on Sierra Avenue and Avenue 56 to Fountain Springs.  In Fountain Springs J22 has an eastern terminus but the road continues into Sequoia National Forest and through California Hot Springs as Mountain Route 56.





California Hot Springs essentially is a ghost town located at 3,081 feet above sea level.  California Hot Springs opened up 1882 as a health resort which grew into a small community with a shopping center.  The California Hot Springs Resort burned down in 1932 followed by the shopping center in 1968.  T…

Old 1916 Elkhorn Avenue Concrete Pony Truss Bridge

The other day I was browsing bridgehunter.com when I noticed that there an old Concrete Pony Truss bridge spanning the Fresno Slough in rural Fresno County near Burrell on Elkhorn Avenue.  Today I went out to the old span to grab some photos.






The Old Elkhorn Avenue Bridge apparently dates back from 1916 according to bridgehunter.com.

Old Elkhorn Avenue Bridge

I don't have an exact date for the replacement Elkhorn Avenue span over Fresno Slough but the old grade still has paint which makes it apparent the replacement probably was built in the last two decades.









As stated above the Old Elkhorn Avenue Bridge spans Fresno Slough.  Fresno Slough is a tributary connecting the Kings River to northwest to the San Joaquin River.  Before Tulare Lake dried up it would occasionally crest at about 210 feet above sea level which caused a back flow into the Kings River.  The back flow of Tulare Lake would in turn flow through Fresno Slough towards the San Joaquin River.  Today Fresno Slough rarely…

Legacy of US Route 466 Part 2; Tehachapi to Bakersfield

After completing California State Route 155 and CA 202 I found myself near Tehachapi Pass.  That being the case I trip back down to the Central Valley on CA 58 would have been mundane so I opted for the routing of US Route 466 to through Bakersfield.






This is the 2nd Part to the US Route 466 Legacy Series.  The first entry covered California State Route 46 and the overall history of US 466.

Legacy of US Route 466 Part 1; California State Route 46

The routing of  US 466 compared to modern CA 58 is substantially different from Tehachapi west to Bakersfield.  Heading westward US 466 would have diverged from CA 58 onto Tehachapi Boulevard passing through the community of Monolith before entering the city of Tehachapi proper.  Within Tehachapi US 466 turned south on Curry Street and west on Valley Boulevard.





Since I was on CA 202 I started my trek on the routing of US 466 at Valley Boulevard and Tucker Road.






US 466 diverged from Valley Boulevard and CA 202 at Woodford-Tehachapi Road heading …