; and (ii) on completion of applicable feasibility studies, environmental reviews, and cost-benefit analyses that include favorable recommendations for further project development. (3) Intermediate and final phases (A) In general The Secretary, in coordination with the State of Washington and in consultation with the Yakama Nation, shall develop plans for intermediate and final development phases of the Integrated Plan to achieve the purposes of this Act, including conducting applicable feasibility studies, environmental reviews, and other relevant studies needed to develop the plans. (B) Intermediate phase The Secretary shall develop an intermediate development phase to implement the Integrated Plan that, subject to authorization and appropriation, would commence not later than 10 years after the date of enactment of this section. (C) Final phase The Secretary shall develop a final development phase to implement the Integrated Plan that, subject to authorization and appropriation, would commence not later than 20 years after the date of enactment of this section. (4) Contingencies The implementation by the Secretary of projects and activities identified for implementation under the Integrated Plan shall be— (A) subject to authorization and appropriation; (B) contingent on the completion of applicable feasibility studies, environmental reviews, and cost-benefit analyses that include favorable recommendations for further project development; (C) implemented on public review and a determination by the Secretary that design, construction, and operation of a proposed project or activity is in the best interest of the public