The map you reference seems to show the larger pipelines of various types. It would be helpful to have a color reference guide. It is not obvious to me what the map shows.

This is a map of oil refined product pipelines:

This is a map of crude pipelines:

Natural gas pipelines go pretty much everywhere, except New England has minimal coverage.

Maps for the various products can be found by scrolling down this page under "pipeline coverage".

Regarding pipelines crossing the Canada border, they go both ways. The tar sands that Canada processes are too thick to send through pipelines to the US to be processed, without first being diluted with some lighter oil. In order for this to happen, the US needs to send lighter oil north, by pipeline, to use as a dilutant. Most of the tars sands oil is refined in this country, I believe. Some of the refined product then gets sent back to Canada.

I did some posts a while back on some of the oil and product movements:

Sept 1
Aug 30

Two specific situations of that I am aware of are:

• I once worked at a paper mill on the west coast of Vancouver island that produced newsprint for the LA Times. The bunker oil for the mill came up from California
• Quaker State refines lubricating oils in Ontario. They are advertised as being made from "100% Pennsylvania crude"

There is also substantial product movement between Port Huron MI and Sarnia ON.

As I pointed out in my earlier posts, one of the pipelines between Montreal QC and Portland ME is being reversed to send Alberta crude to Texas starting in about 2010.

There possibly will be a movement in the US to stop exporting "our" oil in order to increase supply and reduce prices. The real effect would probably be the exact opposite. For example, less distillates sent north will mean it is harder to send crude south. There are ways to get around this, but they are more difficult and expensive.

Information on closed pipelines from here:

One of the biggest refined products pipelines is the 5519-mile Colonial with a capacity of 2.4 mbpd. It is currently shutdown because of lack of product. The colonial stretches from Texas to New York and feeds all the states along the way. If the Colonial is not restarted soon the entire eastern seaboard will begin experiencing fuel shortages. The 700,000 bpd Explorer pipeline from Texas to Indiana is completely shutdown from lack of product. The 600,000 bpd Plantation pipeline from Louisiana to Virginia is operating at greatly reduced rates. All of these pipelines could be offline for another two weeks suggesting a serious shortage of fuel will develop on the east coast.