This is really top secret. I'm hoping nobody reads it. As mentioned, my little dog valley has been invaded by huge trucks laying in erosion protection. The recent big flood has left one section of sewer pipe hanging,, and one section exposed. They are now pouring in armour stone and rip-rap.
I just walked it with the new puppy, and another old engineer. We have watched the flash floods through this valley for 20 years, and noted the erosion rate, which has increased an order of magnitude in the last few years. Perhaps Global Warming taking a bite!
Anyway, we looked at the work, and we both feel that they have underestimated the flood forces by a factor of 10. This will be fun to watch over the next few years. If everything only lasts two years max, they should be able to say this was only temporary. :)