you're talking about the lines in a distribution field, right ?,,, never heard the term.
you might be able to build a floating slab or a p/t'd beam mounted shed - remember when our local bldg/code enforcement officer wouldn't issue a permit to rebuild an existing burned structure w/o EXPENSIVE contour survey,,, built 2 20x20 bldgs on the original slab which could be moved on the property,,, no taxes, either - temp bldgs
sooner or later your assessors or inspectors find out so enlist your bldg guy early,,, they LOVE to help solve problems if you stroke them right - inflates their ego.