Sec. 2. Revision of water manuals
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Not later than 18 months after the date on which the Secretary of the Army, acting through the Chief of Engineers, identifies all eligible projects under section 3(c), the Secretary shall revise the water manuals of not more than 15 such projects (including not fewer than 6 projects that are not wholly owned and operated by the Corps of Engineers, if a sufficient number of such projects are identified) in accordance with this section. A revision of a water manual under subsection
(a)shall incorporate— a forecast-informed reservoir operations plan, in accordance with subsection (c); new watershed data; and as applicable, the effects of any structural improvement completed after the date of the most recent revision of the water manual. The Secretary, in collaboration with the Administrator of the National Oceanic and Atmospheric Administration, shall create a forecast-informed reservoir operations plan for each selected project and incorporate such a plan into the applicable revision of a water manual under subsection (a). A forecast-informed reservoir operations plan shall include each of the following components: A consideration of the relationship between ocean and atmospheric conditions, including the El Niño and La Niña cycles, and the potential for above-normal, normal, or below-normal rainfall for the coming water year, including a consideration of atmospheric river forecasts. The precipitation and runoff index specific to the basin and watershed in which the relevant project is located, including information regarding the hydrological and meteorological conditions, at each 10-digit hydrologic unit (as defined by the U.S. Geological Survey) within such watershed, that influence the timing and quantity of runoff. Updated hydrologic forecasting for precipitation, snowpack, and soil moisture conditions. An adjustment of flood control rule curves to optimize, as applicable, water supply storage and reliability, hydropower production, environmental benefits related to flows and temperature, or other authorized project benefits, without a reduction in flood safety. Proactive management in response to changes in forecasts. In revising a water manual under subsection (a), the Secretary shall— consult with affected entities, including— non-Federal interests responsible for the operations and maintenance costs of the flood control project for which the water manual is to be revised; water rights holders; individuals or entities with a right to any portion of the water within the reservoir of such project; and local agencies with flood control responsibilities downstream of such project; and enter into a cooperative agreement, memorandum of understanding, or other agreement with each non-Federal interest for the project, describing the scope and goals of the revision and the coordination among the parties. Not later than 180 days after the date on which the Secretary completes a revision of a water manual under subsection (a), the Secretary shall submit to Congress a report regarding the components of the forecast-informed reservoir operations plan incorporated into such revision. The Secretary may accept and expend amounts from non-Federal interests to fund all or a portion of the costs of carrying out a revision of a water manual under this section.