; or (ii) $1,000,000. (C) Dredging projects Not more than 25 percent of the amounts made available for grants under this subsection for a fiscal year may be used to make grants for projects described in paragraph (3)(A)(ii)(III). (D) Development phase activities Not more than 10 percent of the amounts made available for grants under this subsection for a fiscal year may be used to make grants for development phase activities under paragraph (3)(B). (8) Federal share of total project costs (A) Total project costs To be eligible for a grant under this subsection, an eligible applicant shall submit to the Secretary an estimate of the total costs of a project under this subsection based on the best available information, including any available engineering studies, studies of economic feasibility, environmental analyses, and information on the expected use of equipment or facilities. (B) Federal share (i) In general Except as provided in clauses (ii) and (iii), the Federal share of the total costs of a project under this subsection shall not exceed 80 percent. (ii) Dredging projects The Federal share of the total costs of a project described in paragraph (3)(A)(ii)(III) shall not exceed 50 percent. (iii) Rural areas The Secretary may increase the Federal share of costs above 80 percent for a project located in a rural area. (9) TIFIA program At the request of an eligible applicant under this subsection, the Secretary may use amounts awarded to an eligible applicant under this subsection to pay the subsidy and administrative costs of a project necessary to provide the applicant with Federal credit assistance under chapter 6 of title 23, with respect to the project for which the grant was awarded, if such project is eligible for credit assistance under that chapter. (10) Procedural safeguards The Secretary shall issue guidelines to establish appropriate accounting, reporting, and review procedures to ensure that— (A) grant funds are used for the purposes for which they were made available