Civil 3D: why are Feature Lines attracted when crossing 

Answer: because they are on the same site
0:00:00 - set the USC by object for convenience (optional)
0:00:07 - we are creating a gas pipeline Feature Lines
0:00:23 - creating a sewer Feature Lines
0:00:43 the white triangle is the point of contact of the lines (it should not be)
0:01:06 - I show you how deformed/The sewer line was pulled in
0:01:16 - transfer of the line to a new site
0:01:16 - creating a new site
0:01:28 - we observe how the point of intersection of the lines has disappeared
0:01:35 - I show that now the lines do not touch, and are located according to survey elevations

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