A US$21.8m contract to construct the final portion of the Lincoln Avenue Grade Separation project in Washington, US, has been approved by the Port of Tacoma Commissioners.

The project includes construction of a 2,200ft overpass with three lanes of roadway over four sets of railroad tracks, for carrying trucks and other vehicles over busy rail lines in the Tacoma Tideflats area.

In an effort to support the project, the Port has completed three surface streets and relocated utilities.

Earlier in March, the Port had received $15.4m from American Recovery and Reinvestment Act funds for the overpass.

Scarsella Brothers has submitted a bid of $21.8m for the project, which the lowest among the nine bids received by the Port and is 10% lower than the engineers’ estimate of $24.4m.

The construction work on the overpass is expected to commence in August or early September 2009.