Bureau of Transportation Statistics (BTS)
BTS Home > Publications > BTS Special Report > July 2008
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Table 2: Liquid v. Transmission Systems Characteristics

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Hazardous Liquid pipelines Gas transmission pipelines
~ 300 operators ~ 900 operators
~ 50 large operators ~ 90 large operators
~ 350 accidents/year ~ 130 incidents/year
More of infrastructure data in annual reports Less infrastructure data in annual reports
Integrity Management inspection data for most operators Less Integrity Management inspection data for operators
Overall – more data to work with Overall – less data to work with

SOURCE: U.S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration, http://www.phmsa.dot.gov.
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