Thanks for the reply Todd .. Good suggestion .. I am draining right now to get the pipe back to a normal position .. I thought maybe placing some big flat rock on the end but if it wasnt perfect it may crush the end
maybe like you suggest a fitted rebar half collar with a steel 3 sided box structure around it .. could then place some large rock on the steel structure without compromising the integrity of the pipe ..
To answer your question as to do I need the extra pipe .. I extended the pipe so that when I drained next year to put in a water control structure .. I would have enough length to dig out underneath to pour a concrete pad then fit the structure over the pipe and seal ... Idea being if i had extra at that time I could cut it off .. kind of bigger is better philosopy .. ya know