Thanks for the note .... what you described is what I expected based on my engineering experience as well... that it will freeze during cold time and if the pitch is not great enough then the water will not drain from the pipes and the water will freeze in the pipes....and even if the pitch is...
Just trying to answer the one question I was not sure of - you know how it is.... word of mouth between people who do not do engineering but says that so and so says so ....and that is all they know ......
Appreciate all of the input .....
The existing UG work has never been affected by frost and that is probably because the ground is almost all sand and glacial till so it drains very easily.
Also, the inlet and discharge pipes are above the bottom and that is why I am concerned about the freezing.
I am involved with a project where a catch basin is being installed and the pipes inlet and discharge pipes will be above the winter frost level and I have been told that the ground will still be warm enough around the catch basin and that any water that stays in it throughout the winter will...