For example, Congress can delegate a limited right of eminent domain to private entities “to be exercised by them in the execution of works in which the public is interested.” Miss. & Rum R. Boom Co. v. Patterson, 98 U.S. 403, 406 (1878); e.g., Natural Gas Act, 15 U.S.C. § 717f(h) (giving gas companies power of eminent domain for construction of natural gas pipelines).