; and (2) the date that is 15 years after the date of enactment of this Act. D Water supply 3301. Authority to make entire active capacity of Fontenelle Reservoir available for use (a) In general The Secretary of the Interior (referred to in this section as the Secretary ), in cooperation with the State of Wyoming, may amend the Definite Plan Report for the Seedskadee Project authorized under the first section of the Act of April 11, 1956 (commonly known as the Colorado River Storage Project Act ) ( 43 U.S.C. 620 ), to provide for the study, design, planning, and construction activities that will enable the use of all active storage capacity (as may be defined or limited by legal, hydrologic, structural, engineering, economic, and environmental considerations) of Fontenelle Dam and Reservoir, including the placement of sufficient riprap on the upstream face of Fontenelle Dam to allow the active storage capacity of Fontenelle Reservoir to be used for those purposes for which the Seedskadee Project was authorized. (b) Cooperative agreements (1) In general The Secretary may enter into any contract, grant, cooperative agreement, or other agreement that is necessary to carry out subsection (a). (2) State of Wyoming (A) In general The Secretary shall enter into a cooperative agreement with the State of Wyoming to work in cooperation and collaboratively with the State of Wyoming for planning, design, related preconstruction activities, and construction of any modification of the Fontenelle Dam under subsection (a). (B) Requirements The cooperative agreement under subparagraph (A) shall, at a minimum, specify the responsibilities of the Secretary and the State of Wyoming with respect to— (i) completing the planning and final design of the modification of the Fontenelle Dam under subsection (a)