Committee on Agriculture, Nutrition, and Forestry of the Senate and the Committee on Agriculture of the House of Representatives a notice of the approval, including a description of the justification for the approval and a copy of the plan. (2) Projects more than 4,000 acre-feet of capacity In the case of any plan for a flood prevention project under this Act involving any single structure providing more than 4,000 acre-feet of total capacity, not less than 60 days before approving a plan described in subsection (a)(1), the Secretary shall provide to the Committee on Environment and Public Works of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives a notice of the approval, including a description of the justification for the approval and a copy of the plan. (c) Watershed or subwatershed areas If the estimated Federal contribution to the construction cost of works of improvement in the plan for any watershed or subwatershed area exceeds $50,000,000 or includes any structure that provides more than 2,500 acre-feet of total capacity, the Secretary shall provide a copy of the plan and a justification for the plan to— (1) the Committee on Agriculture, Nutrition, and Forestry of the Senate and the Committee on Agriculture of the House of Representatives, if the plan includes no single structure providing more than 4,000 acre-feet of total capacity