All forms of oil extraction, storage and transportation have been involved in spills. Pipeline leakage, spills on water, and contamination from road or rail accidents are being reported with increasing frequency
Pipeline Spills
Pipeline spills on land are especially complex. Although the volume spilled in an incident can range in size from relatively small to quite large, on-land incidents usually affect homes, local governments, companies and employees. Pipelines often transport significant quantities of crude oil, or a substance known as “bitumen” which is more corrosive and difficult to clean up than conventional oil.
A major risk factor affecting pipeline oil transport is whether the oil will be moved through ecologically sensitive environments, highly developed communities, or close to essential natural resources such as water. Most of the nation’s 70,000 miles of crude oil pipelines are underground, carrying approximately a billion gallons of oil to refineries daily. Because the oil in the pipe is pressurized, aging pipes are at risk for leakage from problems such as corrosion. While the federal Pipeline and Hazardous Materials Safety Administration (PHMSA) data shows that nearly nine million gallons of crude oil has been spilled from U.S. pipelines since 2010, the PHMSA also reported that more than 70 percent of the oil was recovered. Still, increased crude oil production tracks an increase in significant pipeline accidents since 2009.
Pipeline spills that cause oil to come into contact with water are especially difficult to clean-up. In 2010, a spill into the Kalamazoo River left about 843,000 gallons of crude oil in the river. The resulting litigation was finally settled in mid-2016, nearly six years after the spill, with the pipeline owner agreeing to pay $177 million for all of its 2010 oil spills, including the Kalamazoo River event. The total clean-up effort, including restoration, was completed in 2014 and cost the company $1.21 billion, according to SEC filings.
The proposed construction of new pipelines such as the “Keystone XL” project has become the subject of a national debate over pipeline economic benefits and environmental harms. The original Keystone pipeline, owned by Canadian company TransCanada, transports thick bitumen crude oil over 1,136 miles from the oil sands region in Alberta, Canada to as far south as the Gulf of Mexico in Texas. In 2008, TransCanada sought to add a 1,179-mile-long pipeline extension, called Keystone XL, a project designed to move up to 830,000 barrels of oil daily from Alberta to U.S. Gulf Coast refineries that could process the heavy crude. TransCanada stated that the northern segment of the extension was intended to connect the Alberta-produced crude to oil facilities in Nebraska and Illinois. In 2015, then-President Obama rejected Keystone XL -- but immediately after the 2017 presidential election, President Trump took steps to eliminate obstacles to pipeline expansion. In March 2017, the State Department approved Keystone XL, leaving TransCanada only having to obtain a permit from the independent five-member Nebraska Public Service Commission (PSC) to proceed. The PSC approved construction of the pipeline but across a different route than TransCanada preferred, addressing concerns about the potential harm to Nebraska’s ecologically delicate Sandhills region and Ogallala aquifer.
Approval was also granted for the completion of the Dakota Access project, a nearly 1,200-mile-long pipeline intended to transport approximately 500,000 barrels of crude oil daily across four states to an Illinois terminal for shipping to refineries. Despite months of protests launched against the proposed pipeline by Native American tribes and environmental groups, the project gained approval and crude oil began to flow in summer 2017.
Controversy over both the Keystone XL and the Dakota Access projects intensified after the original Keystone pipeline suffered its largest leak to date in November 2017 (just a few days before the Nebraska PSC vote), spilling 210,000 gallons of tar sands oil in South Dakota.
Industry observers have stated that the economics of the extraction of crude oil from tar sands, an expensive process, have changed considerably since the Keystone XL project was proposed. Despite having the requisite approvals, some in the industry question whether the pipeline is still a viable idea when taking into consideration the record-breaking production of domestic hydro-fracturing (“fracking”).
Oil Spills on Water
Oil spills into water, such as the 1989 Exxon-Valdez oil tanker disaster in Alaskan waters and the BP Horizon Deepwater offshore drilling rig spill in the Gulf of Mexico in 2010, are often thought of as coastal dangers. Regardless of location, however, oil spills on water are often more environmentally harmful than those on land because ships can carry much vaster quantities of oil than a single train car, rivers or tides can transport the spilled oil long distances, and marine animals find it more difficult to avoid the oil than land animals. The spills are also incredibly expensive for the involved companies. Beyond the financial losses and reputational damage to BP in the Horizon Deepwater event, the company faced claims from businesses in and around the Gulf of Mexico, including fisheries and tourism-based concerns, individuals, and local governments for environmental reparations. The Exxon Valdez spill generated similar claims.
Rail or Road Shipments
Although the greatest volume of oil is transported by pipeline, the greatest number of oil spills occur in rail or road shipments. These spills are usually smaller in quantity than pipeline or ship spills since the capacity of a train car is less than that of a pipeline or large ship; however, as the July 2013 derailment of a train and its 1.5 million gallons of crude oil in Lac-Mégantic, Quebec demonstrated, train transit still poses a serious threat. The resulting explosion of the runaway train and its cargo in the small town resulted in 47 fatalities and millions of dollars in liability. Also, the February 2015 derailment of approximately 27 train cars and related combustion in Mount Carbon, West Virginia did not result in fatalities but produced extensive property damage and leaked oil upstream of a tributary of the Ohio River. These events show that while a spill in a marine environment has a much greater environmental impact than a spill of the same volume on land, a transportation-related spill on land is more likely to harm or kill human beings and damage property.