You
DO have a dog in this hunt, if you believe that arbitrary seizure of public lands or waters is a dangerous precedent. It violates centuries of Public Trust Doctrine, Tennessee State Law, and Article 1, Section 2 of the Tennessee Constitution.
Go to this site, and see the Corp's self-proclaimed "Property Line", and the intended physical barriers.
http://www.lrn.usace.army.mil/About/Organization/Operations/RestrictedAreasAroundDams/CordellHullDamBoundary.aspx