Missy, my suggestion would be to print this map and put it alongside an STR map of the same/similar scale. I'm thinking, at best, you'd get an approximate idea of where the pipeline will run. If you need something more detailed, you might check SONRIS. Unless, someone with MORE EXPERTISE (cough, lesBskipjay, cough) would care to jump in here.
This line is rumored to run parallel to the recently laid Gulf South pipeline. On the website there is more detailed information and possibly a contact & phone number.