Frequency of Oil Spills

How well constructed does the Enbridge Northern pipeline need to be? It is expected to last 30 years. If Enbridge used technology that is expected to go 60 years without a spill, we would have 50:50 odds of a major spill. But the technology they use creates a spill about every 3 weeks. This is only 1/1000 the safety needed.

~ Roedy (1948-02-04 age:70)