Pics of the overflow tube installation. The clods at the inlet and outlet are only on the outer foot or so. The rest of the tube is well compacted.
I tried something different for anti-seep collars. Dug a foot or so below the pipe, stacked up dirt around it to make a form, put premix concrete dry so it would be at least 6" all around the pipe, covered it and compacted. We have set posts before with dry concrete and it sets up fine. Probably not an approved way of creating an anti-seep, but will see if it fails. Did four collars total. I have read mixed reviews in some publications in the past and some do not even use anti seep collars. The clay was a good moisture content to get good compaction around the tube. Took 4-14' sections of 8" sewer pipe.
Compaction was done with a TLB with the loader bucket loaded then the front tires used as a rubber tire compactor. Run down each side and over the top multiple times in layers. The clay seemed to work down good.
After everything settles in over the winter, next summer I will form up the inlet and outlet and cover the ends with concrete to protect them from the sun and mowers.
