Concern with the environment was a major factor in the design of the West Fremont Interchange leading to the new bridge spanning the Williamette River from the industrial district of downtown Portland, Oregon. That concern has been reflected most visibly in the shaping of the 50 concrete beams, or piers, supporting the two highway approaches to the bridge that are part of the West Fremont Interchange contract. The objection to previous freeway interchange design has been esthetic, criticizing the use of strictly functional concrete columns supporting the road bed. The present design utilizes sculptured concrete members of flowing, rounded, attractively finished shapes. Few of those shapes are exactly the same. Typically a single concrete pier performs the function otherwise served by several round, square, or rectangular columns. On the lower approach sections, the piers support concrete box girders. Steel girders are used for the balance of the roadbed sections including the center span. The contract for the Interchange was approximately 19 million dollars. Nevertheless it wasn't the cost of the forms that made the job so expensive but the fact that each forms could not used more than a few times. This was reflected in the average cost per cubic yard for the 67,500 cubic yards involved, of approximately 93 dollars.