Because oil pipelines never have problems:

Two recent oil pipeline spills have prompted new criticism from opponents of the proposed Keystone XL project, while raising more questions about whether the federal government is adequately monitoring the nation’s vast labyrinth of pipelines.

An Exxon Mobil pipeline ruptured in central Arkansas on Friday, leaving a sheen of oil on nearby streets and causing the evacuation of 22 homes in the small town of Mayflower...

The Arkansas spill followed an accident in Utah on March 18 in which a Chevron pipeline leaked more than 25,000 gallons of diesel fuel in a wetlands area about 50 miles from Salt Lake City.

The spill in Utah, it turns out, was blocked by a beaver dam. Oily beaver pics, and letters from children thanking the beavers, here.