; and (C) are capable of being manufactured on-site. (2) Construction materials with less than 100-year structural integrity The Secretary, at the election of a project sponsor and with the recommendation of the applicable State Conservationist of the project sponsor, may approve funding under a work of improvement for construction materials for pipes to convey water that do not meet the criteria described in subparagraphs (A) through (C) of paragraph (1). . 5. Notification requirement Section 4 of the Watershed Protection and Flood Prevention Act ( 16 U.S.C. 1004 ) is amended to read as follows: 4. Notification requirement (a) In general (1) Approval by Secretary required No amounts shall be provided under this Act for any plan for a work of improvement involving an estimated Federal contribution to construction costs in excess of $50,000,000, or that includes any structure that provides more than 2,500 acre-feet of total capacity, unless the Secretary has approved the work of improvement. (2) Notice Except in the case of a flood prevention project described in subsection (b), not less than 60 days before approving a plan described in paragraph (1), the Secretary shall provide to the 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. (b) Flood prevention projects (1) Projects less than 4,000 acre-feet of capacity In the case of any plan for a flood prevention project under this Act involving no 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 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