That whole situation started as a homeowners nightmare - the main electrical line was run through our backyard before our house was built. The idiot builder decided to scrape us down 3 feet and build our house below grade. But the electrical line wasn't moving so they left us with a giant pile of dirt in the backyard. We fought them at closing and the resolution was they would come back and put in retention walls along the whole back and one side of our yard. Now we had a usable yard.
Year one my husband nicked the main line with a tiller - that could have been my meal ticket! - which led to another fight with the electric company, as the line we were told was 3 feet underground AND COULD NEVER BE MOVED was more like 6 inches deep. Took me two years but one day they showed up with a trencher and buried the whole thing 6 feet deep. So while we didn't get the backyard we thought we would have, we at least had something we could garden in. And eventually build both a pondless waterfall and a bog with waterfall. Who would have guessed??
Everyone told me I would never win. Don't ever tell me never.