Bobert... what is the depth of the top of your footing?

Those pics remind me of a story. I was resident engineer on an aircraft parking apron about 25 years ago. The contractor was a novice at heavy duty crete and drainage and such. The sub-surface drainage detail showed a cross-section of the trench. Round pipe, square outlines of inverse filter materials and fabrics.

I arrived late in the morning on a Saturday and what I saw almost made me laugh (I didn't because it would have been rude). The green CE Tech in charge had devised a system of formwork to ACTUALLY install the filter as a square(s). I watched for about an hour... they laid 24' of 8" pipe.

I spoke to the Tech aside and explained what I was gonna do. A short while later, I called for a halt to the work and said to the Tech, very loudly so everyone could hear me, "I appreciate that you wanna do the job perfectly but I wanna get back home for beer and BBQ before fucking dark. If I was you and the inspector wasn't here I'd chuck that fancy formwork, dig the trench a bit wider, use a bit more material and be at the beer store before five. Give me me a shovel." He asked if I was actually gonna get in trench. I said, "Fuck no! It's for smacking anyone that tells anyone what I just told you... NOT... to do. Now, let's get to work." 175' per hour.

It takes a big dog to weigh a ton eh?