As a non-American, can someone explain to me why the army was responsible for this work? When does the normal tender/contractor process not occur? Is it a scale or political decision?
1: https://en.m.wikipedia.org/wiki/United_States_Army_Corps_of_...
So it's scale, politics, and history/momentum at this point.
[1] https://en.wikipedia.org/wiki/U.S._Army_Corps_of_Engineers_c...
Wherever infrastructure is done responsibly, it makes sense to invest it'd seem ...
Because...path dependency. The Army Corps of Engineers has long been responsible, largely, as I understand it, from mission following capacity rather than vice versa.
> When does the normal tender/contractor process not occur?
It can, but that process requires a government agency over the top, and the ACE is the responsible agency. They contract out work.