Gas Pipeline running on the property in backyard in TX

[Poonam Hemrajani]

I live in CA and I purchased a property in Jan 2021 in Georgetown TX, we could not go physically to check it out, it was a cash buy and there was an inspection done and no appraisal was required. Now I am trying to take a cashout on the property  to free my money.  During appraisal it came to our attention that there is a gas pipeline in backyard.  My realtor, seller's realtor have missed seeing it to. But my seller who stayed there should have known but has not mentioned in disclosure. 

What can I do ? Is this common in TX ?