See also the links at the end of each written section of the Landowners Rapid Response Guide.
These are good sites for researching pipelines, eminent domain, and finding details about particular pipelines:
https://maps.fractracker.org/latest/?appid=7f269bb503b5497c9cbc0a63989834c1
https://www.fractracker.org/map/us/
https://www.ncsl.org/research/energy/state-gas-pipelines-federal-and-state-responsibili.aspx
https://www.gem.wiki/Main_Page
https://pstrust.org/landowners-guide-to-pipelines/
https://www.chescoplanning.org/pic/pdf/LandownersResourceGuide.pdf
https://ohioline.osu.edu/factsheet/anr-33
https://pennstatelaw.libguides.com/c.php?g=702433&p=4986236
If the pipeline on your land is a gas pipeline that crosses state lines (interstate), or a pipeline feeding an LNG terminal then the Federal Energy Regulatory Commission (FERC) is reviewing or permitting it. If your pipeline is under FERC purview then you must register as an intervenor.
https://www.ferc.gov/how-intervene
https://ferc.gov/ferc-online/overview
https://www.ferc.gov/landowner-topics-interest