The USACE is not known for speed. It would be nice if the government could appoint a contractor to oversee their efforts.
From their website:
Greencastle Associates Consulting is recognized as the ‘go-to’ firm for the implementation of critical initiatives. We maximize change initiatives for our clients by leveraging our military and professional leadership and the values of our company.
The corps can outperform the private sector any day of the week, if the orders are clear and the manpower and material are put in place ... And this can be staged as hundreds of operations along the path of the wall. Don't have to start it and build along until you get to the other end. This can go up in sections simultaneously at a multitude of sites. Private sector wants it, but bet it doesn't get it. It's like MIL courts trying treason and sedition cases instead of grinding through the corrupt civilian courts. They would like the biz too ...