; or (G) a revolving fund. (8) Eligible infrastructure project (A) In general The term eligible infrastructure project means the construction, consolidation, alteration, or repair of the following sectors: (i) Intercity passenger or freight rail lines, intercity passenger rail facilities or equipment, and intercity freight rail facilities or equipment. (ii) Intercity passenger bus facilities or equipment. (iii) Public transportation facilities or equipment. (iv) Highway facilities, including bridges and tunnels. (v) Airports and air traffic control systems. (vi) Port or marine terminal facilities, including approaches to marine terminal facilities or inland port facilities, and port or marine equipment, including fixed equipment to serve approaches to marine terminals or inland ports. (vii) Transmission or distribution pipelines. (viii) Inland waterways. (ix) Intermodal facilities or equipment related to 2 or more of the sectors described in clauses (i) through (viii). (x) Water treatment and solid waste disposal facilities. (xi) Storm water management systems. (xii) Dams and levees. (xiii) Facilities or equipment for energy transmission, distribution or storage. (B) Authority of the Board of Directors to modify sectors The Board of Directors may make modifications, at the discretion of the Board, to any of the sectors described in subparagraph (A) by a vote of not fewer than 5 of the voting members of the Board of Directors. (9) IFA The term IFA means the Infrastructure Financing Authority established under section 101. (10) Investment-grade rating The term investment-grade rating means a rating of BBB minus, Baa3, or higher assigned to an eligible infrastructure project by a ratings agency. (11) Loan guarantee The term loan guarantee has the meaning given the term in section 502 of the Federal Credit Reform Act of 1990 ( 2 U.S.C. 661a ). (12) OTRA The term OTRA means the Office of Technical and Rural Assistance created pursuant to section 106. (13) Public-private partnership The term public-private partnership