; or (ii) $25,000,000, in the case of a project for which the original cost of the planned extraordinary operation and maintenance work is not more than $100,000,000. (C) Public benefits In the case of a project modification under subparagraph (A), not less than 50 percent of the new benefits provided by the modification of the project, as compared to the original planned extraordinary operation and maintenance work, shall be public benefits. (D) Written consent required A project modification under subparagraph (A) shall not be constructed until the date on which the Secretary has obtained the written consent of— (i) the transferred works operating entity