Last Friday, as national attention turned to the massive Exxon Pegasus tar sands pipeline spill in Mayflower, Arkansas, another oil spill was occurring near Houston, Texas. Operators of a Royal Dutch Shell subsidiary's West Columbia pipeline, a 15 mile long, 16 inch diameter line, received warnings from the US National Response Center of a potential 700 barrel release (nearly 30,000 gallons) of crude oil on Friday, March 29.

Yesterday, representatives from the US Coast Guard acknowledged at least 50 barrels of oil had entered Vince Bayou, a waterway connected to the Gulf of Mexico.

On Monday, April 1, Shell spokeswoman Kimberly Windon told Reuters "no evidence" of a crude oil leak had been found. "Right now, we haven't seen anything," she said at the time. Investigators have since determined at least 60 barrels of the spilled oil had entered the Bayou. It is unclear at this time what kind of crude oil the pipeline carried.

DeSmog contacted Shell Pipelines US media relations department to inquire about the type and size of the spill but did not receive a reply by the time of publication.

Steven Lehman, Coast Guard Petty Officer told Dow Jones, "That's a very early estimate – things can change."

The pipeline, which moves crude oil from Genoa to a tank farm in East Houston is run by Magellan Midstream Partners.

This spill is the latest in a barrage of oil-related accidents, including two rail car derailments – one in Minnesota and one in Canada – as well as the pipeline rupture in Arkansas.

Sierra Club executive director Michael Brune released this statement:

“In these three latest oil disasters, oil companies have proven they are irresponsible. In Ontario, the company said it spilled four barrels when it had actually spilled 400. In Arkansas, Exxon learned about the spill from a homeowner but kept pumping tar sands crude into the neighborhood for 45 minutes, and is bullying reporters who want to tell the public what's going on. Today, in Texas, a major oil spill came to light that Shell had been denying for days.

"Transporting toxic crude oil — and tar sands in particular — is inherently dangerous, more so because oil companies care about profit, not public safety. This is why Keystone XL, at nine times the size of the Arkansas Pegasus pipeline, must never be built.” 

Stay tuned for more updates as we learn further details about this Shell spill.

Image Credit: Shell Pipelines US.

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If only this were milk there would be no need to cry.

Cleanup efforts are currently underway in four separate oil spills that have occurred in the last ten days.

On March 27th, a train carrying Canadian tar sands dilbit jumped the rails in rural Minnesota spilling an estimated 30,000 gallons of black gold onto the countryside. 

Two days later a pipeline ruptured in the town of Mayflower, Arkansas, sending a river of Albertan tar sands crude gurgling down residential streets. And news is just breaking about a Shell oil spill that occurred the same day in Texas that dumped an estimated 700 barrels, including at least 60 barrels of oil into a waterway that leads to the Gulf of Mexico (stay tuned for more on that).

This week a Canadian Pacific freight train loaded with oil derailed, spilling its cargo over the Northwest Ontario countryside. Originally reported as a leak of 600 liters, the CBC reported on Thursday that the estimated volume of the spill has increased to 63,000 liters.

The accelerating expansion of Alberta’s tar sands has North America’s current pipeline infrastructure maxed out and, as a result, oil companies have been searching for an alternative way to move their product to market. As lobbying efforts around the stymied Keystone XL and Northern Gateway pipelines intensify, oil companies have been quietly loading their toxic cargo onto freight trains.

There has been a marked boost in the rail transport of crude in the last three years as new extraction techniques increase production in the tar sands. According to Reuters, “U.S. trains carried 233,800 carloads of crude oil in 2012, more than double the 65,800 carloads transported in 2011 and dwarfing the 29,600 in 2010, according to figures from the Association of American Railroads.”

Meanwhile the Canadian Pacific Railway’s crude oil volumes have skyrocketed from 2,800 carloads in 2010 to a staggering 53,000 last year. The company hopes to increase that number to over 70,000 this year.

Most, if not all, advocates of pipeline transportation will argue that the growing use of rail transport emphasizes the urgent need for pipelines. Pipelines are commonly touted as a more reliable mode of fuel transport than rail.

Pipelines, as the story goes, are safe.

Unfortunately for pipeline proponents, last week’s pipeline rupture in Arkansas is no anomaly in the history of US pipelines. In fact, pipelines have made a pretty consistent mess throughout the States for the last 20 years. One thing has changed, however: those messes are getting more expensive to clean up.

The U.S. Department of Transportation’s Pipeline & Hazardous Materials Safety Administration (PHMSA) is responsible for reporting and recording all “significant pipeline incidents” which are all incidents exceeding the cost of $50,000 (in 1984 dollars).

In terms of property damage PHMSA records indicate that the 20-year average (1993-2012) cost of significant pipeline incidents is over 318 million dollars, the 10-year average (2003-2012) cost is over 494 million dollars the 5-year average (2008-2012) cost is over 545 million dollars and the 3-year average (2010-2012) cost is over 662 million dollars.

The cost of cleaning up after pipelines just keeps getting more expensive.

Over the last 20 years, pipeline incidents have caused over $6.3 billion in property damages. On average during this time period there were more than 250 pipeline incidents per year, without a single year where that number dropped below 220. During that time, more than 2.5 million barrels of hazardous liquids were spilled and little more than half of those spilled amounts were recovered in cleanup efforts.

One of the factors contributing to the cost of cleanup is the introduction of Alberta’s diluted bitumen to southern markets (The most expensive year on record is 2010 when Enbridge spilled 3.3 million liters or 877,000 gallons of dilbit into Michigan’s Kalamazoo River).

Companies eager to move Canadian dilbit south to refineries and export facilities have been jimmying an aging pipeline infrastructure to handle the more corrosive substance and there is currently no federal oversight to monitor this process. 

Pipeline Network by Petroleum GeoGraphics Corp. on NRP.

Two decades of pipeline spills, mapped by the New York Times.

ExxonMobil’s sixty-five-year-old Pegasus pipeline that ruptured last week was one such retrofitted line. Built in the late 1940s, the old winged horse of a pipeline was reversed in 2006 in order to carry Canadian dilbit to the Gulf Coast via Illinois at a 50 percent increased capacity. The burst line sent a river of at least 84,000 gallons of dilbit running down residential streets in Mayflower and into nearby wetlands. 

The exact cause of the pipeline rupture is still unknown.

Many of the major pipeline operators – like Exxon, Enbridge and TransCanada – have been cited for lax inspections, shoddy emergency preparedness, and ineffective spill management and response. Both Exxon and Enbridge have been told their actions in the immediate hours after pipeline ruptures have made spills worse than necessary.

NPR reports “more than half of the nation’s pipelines were built before 1970. More than 2.5 million miles of pipelines run underground throughout the country.”

Debbie Hersman with the National Transportation Safety Board told NPR, “100 percent of the accidents that we’ve investigated were completely preventable.” In many cases companies performed inspections and discovered cracks and corrosion in the line but did not perform repairs before accidents occurred.

In an interview with Reuters, John Stephenson, vice president and portfolio manager at First Asset Investment Management in Toronto described these events as “not good for producers…not good for Canadian oil going south…not good for Keystone.”

But added, “the reality is this oil is going to make it south of the border, quite likely by rail or one of the other pipelines across the Canadian-US border, so I see it as a short-term hiccup at worst.”

Yet even a cursory glance at the history of pipeline accidents in the US shows what is happening in Arkansas is no ‘hiccup’ and will bear no ‘short-term’ consequences. At least, not for the residents of Mayflower.

Image Credit: Eilish Palmer, Lady with a Camera.

The Narwhal’s reporters are telling environment stories you won’t read about anywhere else. Stay in the loop by signing up for our free weekly dose of independent journalism.