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Nalley Valley Viaduct


Nalley Valley Viaduct

Below deck view looking North

Photo taken by G. M. Erickson in March 2007


BH Photo #220128


Street Views 


This bridge was designed by the same architect who came up with the Kingdome, John Christiansen. The stadium much like this bridge was scorned by officials and residents for a variety of reasons. While the Seattle Mariners and Seahawks play in newer and somewhat fancy digs the Nalley Valley Viaduct was replaced in sections by an ugly post-modern concrete monstrosity complete with a baffling 90 degree off ramp.

Few mourned the old Nalley Valley Viaduct's passing although one resident did petition the WSDOT to consider sparing it on historic grounds. The demolition contractor remarked on the odd design of the viaduct in a blurb in the Tacoma News Tribune.


Lost Concrete tee beam bridge over Nalley Valley Viaduct on WA 16
Tacoma, Pierce County, Washington
Replaced by new bridge
Built 1970; replaced 2011
- John Christiansen
Concrete tee beam
Length of largest span: 120.1 ft.
Total length: 1,342.9 ft.
Deck width: 51.8 ft.
Approximate latitude, longitude
+47.23333, -122.46167   (decimal degrees)
47°13'60" N, 122°27'42" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/540748/5231234 (zone/easting/northing)
Quadrangle map:
Tacoma South
Average daily traffic (as of 2007)
Inventory number
BH 50080 (Bridgehunter.com ID)
Inspection report (as of June 2009)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 91.7 (out of 100)
View more at BridgeReports.com

Update Log 

  • November 7, 2011: Added by K. A. Erickson



Nalley Valley Viaduct
Posted October 11, 2012, by K. A. Erickson

Attached below is the famous, or infamous as the case may be, off ramp on the New Nalley Valley Viaduct. WSDOT has allegedly given themselves an award for this brilliant creation of engineering.

In other news I came across a link to an urban artist who compiled their interpretation of the Old Nalley Valley Viaduct.


Do you think anyone will do odes to the current class of UCEBs?