Complex sentence: The bridge was opened to traffic on November 2,1971 and was constructed by Peter Kiewit & Sons, who won the contract with a bid of $4,356,070 (equivalent to about $in).
Split into simpler sentences: The bridge was opened to traffic on November 2,1971. It was constructed by Peter Kiewit & Sons, who won the contract with a bid of $4,356,070 (equivalent to about $in).