Oil production in the U.S. has zoomed higher over the past couple of years and is now at the highest level in about two decades. That has created quite a problem for our nation's oil pipeline infrastructure, which has been filled to capacity. Many oil producers have turned to rail in an effort to get oil to refineries. The following chart shows just how impressive the oil-by-rail growth has been:

Source: EIA


As the chart shows, while still growing, oil shipments by rail have slowed in ascent compared to 2012. Overall, crude oil and refined products shipped by rail in the U.S. still grew by 48% over the first half of last year. That's well ahead of the midway point last year, where traffic was up 38% over 2011. However, such heady growth on a percentage basis isn't as likely in the future because it's off a larger base and additional pipeline capacity will be coming on line.

The most controversial pipeline is still up in the air. The Keystone XL proposed by TransCanada would ship about 830,000 barrels of oil per day, including 100,000 barrels of Bakken oil. For perspective, that's between 1,220 and 1,150 rail cars per day that would be required to fill the gap. That's why, if the pipeline isn't approved, it could lead to a 42% increase in rail shipments of crude oil by 2017, potentially costing oil producers a lot of money.

Those costs could really be affected by the recent tragic events in Canada because the industry could face increased regulations to make oil-by-rail even safer, despite the fact that oil-by-rail has a relatively stellar safety record. According to data from the U.S. Department of Transportation, the "spill rate" for railroads from 2002-2012 was only 2.2 gallons per million crude oil ton-miles generated. The comparable spill rate for pipelines was about 6.3 gallons per million ton-miles, which is about three times the rate of rail.

The biggest concern here is that 2013 has been a terrible year for oil-by-rail; the recent disaster in Canada isn't the only derailment. Canadian Pacific had three derailments involving oil tank cars in the first four months of this year. One of the accidents, in Minnesota, resulted in 30,000 gallons of oil being spilled. It remains to be seen if these spills will be the tipping point for the approval of additional pipeline projects.

A Canadian Pacific train transporting oil (Source: Flickr/roy.luck)

In the meantime, rail will continue to play a vital role for oil transportation. The biggest beneficiaries will be those refiners that are gaining access to cheaper oil from the Bakken and the Canadian oil sands. Phillips 66 and Tesoro have focused on using rail to deliver oil to coastal refineries. Phillips 66, for example, has ordered 2,000 rail cars in order take crude oil from the Bakken to its refineries in Ferndale, Wash., and Bayway, N.J. In addition to the rail cars, it has signed several logistics deals regarding the loading and unloading of crude oil onto those cars. This is because every $1 per barrel of oil the company can save each year translates to an extra $450 million of net income. 

Tesoro has also been looking to take further advantage of the explosive growth of oil-by-rail transport. The company is planning a terminal in the Port of Vancouver capable of handling 380,000 barrels of oil per day. Accessing 380,000 barrels of cheaper U.S.-produced oil could save the company $1.37 million per day, given the current discount at which U.S.-benchmarked crude oil trades. This particular project, which could cost $100 million, would be capable of sending oil to West Coast refineries as well as be a potential location for future oil exports.

The other big beneficiaries of oil-by-rail transport are of course the railway owners like Canadian Pacific and Berkshire Hathaway , which owns Burlington Northern. In fact, crude oil shipments helped Canadian Pacific deliver its best first-quarter results ever. The company expects those numbers only to improve, and even double its crude oil deliveries.

Warren Buffett's company also sees big things from its oil-by-rail business; it, too, expects to double its oil shipments. Burlington has a 40% market share when it comes to hauling petroleum products by rail, which is double its top competitor's and well above the 12% market share of Canadian Pacific. Burlington as a whole was just 12% of Berkshire's overall first-quarter revenue; furthermore, while petroleum product volumes rose by 14% in the quarter, it's hardly budged overall rail volumes, which were up just 3%. So the risk that oil shipments may diminish won't derail the insurance giant. 

The key takeaway for investors is that moving oil by rail doesn't appear to be showing any real signs of slowing down; however, the risks are increasing that it could. The disaster in Canada could cause increased regulatory costs or encourage a faster approval process for pipelines. In addition, U.S.-priced oil isn't selling at the massive discount to worldwide benchmarked oil. In fact, the discount has been squeezed by about $20 in the past year, taking away many of rail's cost savings. That could halt the growth of oil shipped by rails because it's a much more expensive method when compared to pipelines. In my opinion, that means there are more downside risks to investors, which is why it might be better to look to profit elsewhere. 

To help you know where to find other potentially more profitable opportunities, the Motley Fool is offering a comprehensive look at three energy companies set to soar during the current transformation in the energy industry. To find out which three companies are worth a closer look, you are invited to check out the special free report, "3 Stocks for the American Energy Bonanza." Don't miss out on this timely opportunity; click here to access your report -- it's absolutely free. 

The article The Oil-By-Rail Explosion Continues originally appeared on Fool.com.

Fool contributor Matt DiLallo owns shares of Phillips 66 and has the following options: long January 01 2014 $70 calls on Berkshire Hathaway. The Motley Fool recommends Berkshire Hathaway. The Motley Fool owns shares of Berkshire Hathaway. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

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