; (ii) a feasibility study, as defined in section 105(d) of the Water Resources Development Act of 1986 ( 33 U.S.C. 2215(d) ); or (iii) a review conducted under section 216 of the Flood Control Act of 1970 ( 33 U.S.C. 549a ), including an initial appraisal that— (I) demonstrates a Federal interest; and (II) requires additional analysis for the project or separable element. (B) Water resources development project The term water resources development project includes an environmental infrastructure assistance project or program of the Corps of Engineers. (2) Treatment of project modifications For purposes of this section, if an authorized water resources development project or separable element of the project has been modified by an Act of Congress, the date of the authorization of the project or separable element shall be deemed to be the date of the most recent modification. 302. Backlog prevention (a) Project deauthorization (1) In general A water resources development project, or separable element of such a project, authorized for construction by this Act shall not be authorized after the last day of the 10-year period beginning on the date of enactment of this Act unless— (A) funds have been obligated for construction of, or a post-authorization study for, such project or separable element during that period