Small issue with digging the footings

I called Digsafe earier in the week and they told me that they only mark cable, electric, and gas lines. Since I have a water line and sewer line I needed to call my town office to fine out how to have these pipes marked - I wanted to stay away from the sewer and water lines because they are, no doubt the oldest pipes coming into my house. It only took them a couple days to come by and mark all the stuff that had to be marked (it turned out that I only have one water/sewer trench and one gas line coming into my house).

Well, I went to dig four holes (each one needs to be 48 inches deep and 12 inches in diameter) for the four footings that I had originaly designed the porch to have but realized that I would be very close to the yellow flags for the gass line that the dig safe guy had put on the front lawn. I decided to dig anyway, but to take it easy once I got to the level I thought the gas pipe would be ( I judged this by looking where it came into the basement)....

Well, it seems that the marker was a bit off and it turns out that the gas pipe goes directly through the whole I need to did for one of the footings.

Soooooo, I will need to change the design to have only three footings I guess. I am bringing the following design in to the building department for them to ok to change, we'll see what they say.