CRV Enterprises, Inc., et al. v. United States, 626 F.3d 1241 (Fed. Cir. 2010)

(plaintiffs are riparian owners on one side of stream at issue across from a business engaged in wood-preserving activities resulting in the emission of hazardous chemicals into the water; EPA asserted jurisdiction and ordered the construction of a log boom which did not touch plaintiffs' property, but did interfere to some degree with plaintiffs' navigation activities; plaintiffs sued for a physical taking, but dismissal of claim affirmed on appeal; defendant did not physically appropriate plaintiffs' water rights and no water actually taken from its source; regulatory taking claim not ripe because plaintiffs lacked standing to bring claim due to non-ownership of subject property at time regulatory taking occurred).