> Bids for construction of the proposed Outer Harbor Tunnel were opened in July 1970, but price proposals were substantially higher than the engineering estimat

> Bids for construction of the proposed Outer Harbor Tunnel were opened in July 1970, but price proposals were substantially higher than the engineering estimates.[11] Officials drafted alternative plans, including a four-lane bridge, which was approved by the General Assembly in April 1971.[12][13] https://en.wikipedia.org/wiki/Francis_Scott_Key_Bridge_(Baltimore) https://en.wikipedia.org/wiki/Francis_Scott_Key_Bridge_(Balt...