Oil pipeline

This week we have mentioned that the area has in the past seen some natural gas extraction and the discovery of a (very) small oil field. They are gone, but we still have a pipeline through the area. It runs east of Rensselaer, going from SSE to NNW. You can see markers along some of the roads like the one below.

Just beyond the marker shown above, the pipeline surfaces and has what looks like a shut-off valve.

I spent a few minutes trying to find out more about this pipeline but could not. I do not know where it starts and where it ends and what it carries. Anyone know more?