Hi Attached shows part of pipe profile, As you can see, slope direction is from manhole 10 (upstream) to manhole 12 (downstream) and in the rule set: the minimum cover is 2.0 m and minimum slope is 0.5%. I am supposed to have this procedure: - 2.0m (minimum) cover for upstream manhole (No.10) - then 0.5% (minimum slope) for the first pipe -again 0.5% (minimum slope) for the second pipe ,but, if manhole (No.12) couldn't have minimum cover then assign 2.0 m (minimum cover) for that..... But, here, as shown, civil 3d assign 2.0 m cover for downstream manhole (No.12) and 0.5 % slope for downstream pipe and then assign 1.5% !! slope for upstream pipe!!? how can I fix this issue? Not to mention, i dont want to do any thing manually, I would like to be done automattically. Thanks Hamid