; (ii) the conservation, development, utilization, and disposal of water; or (iii) the conservation and proper utilization of land. (B) Exclusion The term work of improvement does not include any single structure that provides— (i) more than 12,500 acre-feet of floodwater detention capacity; and (ii) more than 25,000 acre-feet of total capacity. (C) Requirement for agriculture or conservation benefits Each undertaking described in subparagraph (A) shall contain benefits directly related to agriculture or conservation, including communities in rural areas (as defined in section 343(a) of the Consolidated Farm and Rural Development Act ( 7 U.S.C. 1991(a) )), that account for at least 20 percent of the total benefits of the undertaking. (D) Consolidated planning 1 or more subwatersheds, when the subwatersheds are components of a larger watershed, may be planned together at the discretion of the local organization sponsoring the applicable undertaking. . 4. Assistance to local organizations Section 3 of the Watershed Protection and Flood Prevention Act ( 16 U.S.C. 1003 ) is amended— (1) by redesignating subsection (b) as subsection (e); (2) in subsection (a)(6), in the first sentence, by striking occupiers, individually and inserting the following: “occupiers in accordance with subsection (b). (b) Agreements with landowners, operators, and occupiers (1) In general The Secretary may enter into agreements under subsection (a)(6) with landowners, operators, and occupiers, individually ; (3) in subsection (b) (as so designated)— (A) by striking supplemented. Applications and inserting the following: “supplemented. (2) Applications Applications ; (B) in paragraph (2) (as so designated)— (i) in the first sentence, by striking such conservation plans and inserting conservation plans described in paragraph (1)