This is interesting, especially for me as one of the intrastate pipelines on the map crosses through my property.
However, the article doesn't say what the "PIG" is (but talks at length about how the "PIG" is "launched" or "received"). Wikipedia says it's basically a passive device that gets inserted into the pipeline and pushed along by the pressure to clean or inspect the inside of the pipe.
However, the article doesn't say what the "PIG" is (but talks at length about how the "PIG" is "launched" or "received"). Wikipedia says it's basically a passive device that gets inserted into the pipeline and pushed along by the pressure to clean or inspect the inside of the pipe.