; and (2) seek to maximize the combination of flood risk reduction and seismic hazard risk reduction benefits in the formulation of the national economic development alternative for such project. 118. Federal interest determination Section 905 of the Water Resources Development Act of 1986 ( 33 U.S.C. 2282 ) is amended by inserting after subsection (a) the following: (b) Federal interest determination (1) In general In preparing a feasibility report under subsection (a) for a study that will benefit an economically disadvantaged community, upon request by the non-Federal interest for the study, the Secretary shall first determine the Federal interest in carrying out the study and the projects that may be proposed in the study. (2) Cost share The costs of a determination under paragraph (1)— (A) shall be at Federal expense