The new Panama Canal is opening soon and will cause an 'evolution' in a vital US industry

Panama Canal
Panama Canal

(Panama Canal)
Two massive iron gates being moved into position at the site of a new lock, part of a $5.25 billion expansion of the Panama Canal.

On October 9, 1913, President Woodrow Wilson opened the Panama Canal by dynamiting the final dikes holding the water at bay.

He did it from the comfort of the White House, keying a telegraph transmitter that set off the explosion from over 2,000 miles away.

In the 103 years since Wilson pushed that button, the Panama Canal has become an international shipping bottleneck, as container ships grew too large for its aging locks.

Much of that will change in June, when a $5.25 billion effort to expand the canal reaches its long-delayed conclusion, allowing ships more than 2 1/2 times the size of the current limit to pass through the waterway.

The increased capacity could have profound effects on the US transportation industry, as the cost of shipping from Asia to ports in the eastern US would drop significantly. Simply put, bigger ships are more economically efficient and have lower per-unit costs.

Larger ships and lower costs meant importers traditionally chose to bring in goods from Asia at West Coast ports and then to the eastern US by rail.

But if the canal's increased capacity lowers shipping costs to the East Coast by enough, it could mean a sizable loss of freight volume over time for western American railroads, Nerijus Poskus, an expert on international shipping at the booking company Flexport, told Business Insider.

If shippers chose to go through the canal, western railroads such as BNSF, best known as a subsidiary of Warren Buffett's Berkshire Hathaway, and Union Pacific could suffer a drop in freight volume, while eastern railroads like Norfolk Southern, CN, and CSX could see an increase, Poskus said.

Panama Canal
Panama Canal

(Panama Canal)
Construction on one of the major locks underway in Panama.

Places in the US likely to see the biggest change are

Louisville, Kentucky; Memphis, Tennessee; Nashville, Tennessee; and, most immediately, the Gulf Coast.

"Cargo going to Houston used to go to the West Coast," Poskus said, adding that it "will now be going through the Panama Canal."

Already, the shipping giants Maersk and MSC have announced a service to Mobile, Alabama, beginning early next month in anticipation of the canal expansion. Other companies are likely to follow suit.

The ports at Los Angeles and at Long Beach, California, whose port is undergoing a $4.6 billion expansion, may see a drop-off in traffic.

'A lot of moving parts'

Union Pacific, the largest American railroad by freight volume, operates exclusively in the western half of the US. During the company's first-quarter earnings call last month, executives dismissed the potential effects of the expanded canal.