Page:Final Report - The Columbia River Interstate Bridge.pdf/23

 movable span. amounting to $70,013.60. On this showing, your Commission on February 27, 1915, adopted the design contain~ ing that type and awarded contracts for the construction of the bridges as follows:

Contract No. 1-To the United States Steel Products Company. of San Francisco. for the manufacture of the superstructure metal work of the Columbia River bridge.

Contract No. 2—To Porter Brothers. of Portland. for the erection of the superstructure metal work of the Columbia River bridge.

Contract No. 5—To the Northwest Steel Company, of Portland, for the manufacture of the superstructure metal work of the Oregon and Columbia Slough bridges.

Contract No. 6—To Porter Brothers, of Portland, for the erection of the superstructure metal work of the Oregon and Columbia Slough bridges.

Contract No. 7——To the Paciﬁc Bridge Company, of Portland. for the foundations of the Coltunhia River bridge.

Contract No. 9—To the Paciﬁc Bridge Company. of Port» land. for the foundations of the Oregon and Columbia Slough bridges.

Contract No. 10—To the Tacoma Dredging Company, of Tacoma, \Vsshington. for the approach ernbankments.

Contract No. 11—To the \Varren Construction Company, of Portland, for the concrete deck slabs and paving on all the steel bridges.

The bids received at this time for the paving of the embankmenls were rejected owing to the small number of bids and the feeling that those received were unduly high on account of the length of time, about eighteen months, that must elapse before work on this contract could be started.

The bids received on all of the contracts awarded at this time were considerably lower than anticipated. so that there remained sutllcient [units from the proceeds of the bond issues for the construction of impmvements not included in the original plans. The largest of these was the approach embankment to the bridge from Derby Street, which serves a section of Portland distant from Union Avenue, and for which there had been an insistent demand from the inception of the project. Your F.ngi« ncers submitted plans and speciﬁcations for the construction of this approach embankment on April 2, 1915. at which time they were approved by your Commission and the advertisement for