Fluidr / WSDOT's "SR 509 & SR 518: S 192nd St to Normandy Pk & SR 509 to SR 99 Paving & ADA & Deck & Seismic" set

Seismic retrofit work platforms in Tukwila.

N 0 B 8.2K C 0 E Aug 15, 2019 F Oct 7, 2019

Contractor crews installed work platforms so they could seismically retrofit a bridge at the I-405/I-5 interchange in Tukwila.

Tags: SR509; SR518; WSDOT; Tukwila; SeaTac; SeismicRetrofit; Paving; Transportation; ND

Contractor crews cutting into the concrete.

N 0 B 945 C 0 E Apr 8, 2019 F Oct 7, 2019

Contractor crews cut into the concrete bridge so they could gain access to the interior of the hollow box girders.

Tags: SR509; SR518; WSDOT; Tukwila; SeaTac; SeismicRetrofit; Paving; Transportation; ND

Vacuum hoses entering the box girders.

N 0 B 997 C 0 E May 9, 2019 F Oct 7, 2019

A vacuum hose ensures that all concrete particles are safely removed while crews are drilling inside the box girders.

Tags: SR509; SR518; WSDOT; Tukwila; SeaTac; SeismicRetrofit; Paving; Transportation; ND

Old formwork on the inside of a box girder.

N 0 B 944 C 0 E May 2, 2019 F Oct 7, 2019

Old formwork on the inside of a box girder from when the bridge was originally constructed. Removing this was part of the project.

Tags: SR509; SR518; WSDOT; Tukwila; SeaTac; SeismicRetrofit; Paving; Transportation; ND

Holes drilled in the walls of the box girder.

N 0 B 910 C 0 E Apr 9, 2019 F Oct 7, 2019

Once the old formwork was removed from the inside of the box girder, holes were drilled for the new rebar and post-tensioning ducts.

Tags: SR509; SR518; WSDOT; Tukwila; SeaTac; SeismicRetrofit; Paving; Transportation; ND