Corps approval requirement was not what I had in mind, size wise, when it was stated as having a six in overflow. Is this in a populated area, and how big is it? I'm not trying to analyze it, not qualified, just curious. Ponds around here are not governed by the Corp, ever, as far as I know. Would fall under DNR or NRCS here, state or feds, or at the very least SCS office, county, if anything at all. I guess it might only depend on whether they could see it from the road or not. lol
Margo, what were you measuring? Were you measuring the pipe size only, dimensions of the levee or were you shooting elevations as well? During construction, or for an as-built/final walk-through type thing?
Keeping up with construction, site visits, in ten states would be way more driving than I'd want.