comment: >
  
  Overall, Line 5 transports up to 540,000 barrels per day (bpd) of light crude oil, light synthetic crude, and natural gas liquids (NGLs), which are refined into propane. Line 5 delivers 65% of the propane that heats Upper Peninsula homes, and 55% of Michigan's propane needs.
  Peak volumetric transport through the Straits can reach 80,000 m3 s-‐1 (more than 10 times the flow of the Niagara River). Flow through the Straits can play an important role in water quality, contaminant transport, navigation, and ecological processes.
  Enbridge Energy's Line 5 pipeline was built in 1953 and extends for 645 miles across the state of Michigan. Line 5, which is part of Enbridge's Lakehead System, begins in Superior, Wisconsin, and ends in Sarnia, Canada.
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  a  69 year old pipeline  under one of the  largest  water flow straights .   feeding the great  lakes.       time to shut down  line 5 before   it shuts  down the great lakes...
context: Remember none of the liquids that flow under the straits actually is used in Michigan and Enbridge admitted they lied in their PR saying that shutting it would raise gas prices $0.50 in the region... it would raise them less than $0.01 and that's because of higher transport usage. >
  
  Im too lazy to research much about propane and I’ve got a date with a fishing pole but it is also called LPG, liquified petroleum gas. At times it is in a liquid state and one report i read said that is the state it is in when its being transferred. Is it gaseous or liquid while under the straits? More research needed to answer that one.