Jug lines

[usmc_0311_hunter]

My son and I was watching old Ky. afield shows on youtube and he seen Mr. Farmer setting out some jug lines and ask if I knew how to make them so he and I made some of those noodle type jugs but the one thing I don't know is how long do you make your lines?
One other question is were would be a good place to set them out on rough river.
Thanks
I will post some pics of our catch after we get back.

i make my lines 6-8 ft