Until someone with a better answer shows up.

The EPA comes up with all those rules about what can be built and where, so, for example, where I live they were going to build a 70-floor high-rise building, but the environmental agency comes out and tells them that they have to cap the building at 58 floors or the shadow on the river will cool the water down too much and potentially harm the fish. So, the whole building has to be redesigned after it's already 2/3 built.