Attach pergola to patio -- worried about gas lines under patio

[courtHouston]

We are intending to attach our 10x12 pergola to our pool patio this weekend. My concern is knowing that our pool's fire feature has a line that runs underneath the patio. Is it safe to assume we can drill into the patio for a 6.5" titen bolt? I'm seeing most Houston, TX regulation stating gas line must be buried 12 inches below grade.

During construction in 2017, I did try to document each stage with pictures. I'm attaching the best one I could find showing piping heading under the patio (my shadow represents main part of patio). Second pic is dirt area that is now under the concrete patio. Third picture shows the patio type.

Located Tomball, TX (Harris county)

 

[TinFoilHat]

No way to tell. Your photos don't show a gas line. How thick is the patio slab? As long as you don't pierce the slab you should be fine.

 

[Newdude]

Find out where it is :

 

[Bperry]

Find out where it is :

View attachment 643289

Do this. When the guy comes out just tell him what you’re doing and he’ll mark out the gas line location. Concrete tends to be 4”~ deep and gas lines are supposed to be deeper, but the drill bit doesn’t always stop at the required depth.

 

[Newdude]

When the guy comes out just tell him what you’re doing and he’ll mark out the gas

811 will take a full description :

'Drilling support holes for 10x12 pergola 5ft off back door' (etc).

If they deem the heater line to be privately owned, they can probably recommend a local company to hire to locate it. Its tricky because technically anything past anyones meter is customer owned, but none of the utilities want their service damaged so sometimes they mark it and sometimes they dont.

Also, in this and many other circumstances, I consider a $20 bill at first meeting to be an 'attitude adjustment fee'. Hey man !!! I'm (insert name here) and I'm buying lunch today. *gives $20*. Anywho this is what we're doing........

 

[Bperry]

811 will take a full description :

'Drilling support holes for 10x12 pergola 5ft off back door' (etc).

If they deem the heater line to be privately owned, they can probably recommend a local company to hire to locate it. Its tricky because technically anything past anyones meter is customer owned, but none of the utilities want their service damaged so sometimes they mark it and sometimes they dont.

When I did it here (not Texas), the guy came out and had no idea whats the specifics were and wanted to know the general area of what was needed and then marked out everything that was in that area. I’m assuming he’d have marked absolutely everything if I hadn't been there to limit the scope for him.

 

[TinFoilHat]

They can't mark what they don't know about so don't be surprised if they don't have a record of your private gas line, other than that you have one somewhere.