Well it's the year 2018 now.
You don't think there's any residual effects from this? Lots of civil engineering companies are still owned and managed by people who lived back then.
Also you didn't need a college degree to build bridges in the 50s and 60s. You could literally start from the bottom of construction and work your way up if you knew exactly what you were doing and talking about.
But we aren't talking about construction here, are we? We're talking about civil engineering - the people that actually design and dimension these structures.
Snopes hasn't been trust worthy in a long time since they use nothing but strawman arguments to claim something is false or not.
Read the article. They link to a page from the company that built the bridge which confirms that the company is owned by men and had male construction workers.