Power outages in the wake of Katrina have also caused distribution problems for oil and natural gas. Pipelines which move petroleum products from places like Houston to areas of the east coast have had their flows interrupted because power outages shut down the pumps that kept materials flowing. Dick Cheney personally called the manager of the Southern Pines Electric Power Association on the night of August 30 and again the next morning and ordered him to divert power crews to substations in nearby Collins that were essential to the operation of the Colonial Pipeline, which carries gasoline and diesel fuel from Texas to the Northeast.