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3 <br />scenario enabled a determination of the environmental consequences of <br />the seasonal and daily adjustment of releases required by the Opinion. <br />• Seasonally Adjusted High Fluctuation: Under the seasonally <br />adjusted high fluctuation scenario, fluctuations would be maximized to <br />the extent possible within constraints of the USFWS Biological Opinion. <br />Release volumes would be adjusted seasonally to meet requirements of <br />the Opinion. These seasonal adjustments would result in a pattern of <br />operation much different from historical operations. Most importantly, <br />this scenario would feature a month-long 4,700-cfs release in spring, <br />reduced summer flows and fluctuations to meet the restrictions at <br />Jensen, and a two-month period of steady flows during the winter to <br />prevent disruption of ice cover. <br />• Seasonally Adjusted Moderate Fluctuation: The seasonally adjusted <br />moderate fluctuation scenario would be similar to the seasonally <br />adjusted high fluctuation scenario in terms of the seasonal pattern of <br />releases, but daily fluctuations would be reduced by 50%. This scenario <br />would also feature the month-long sustained spring release, reduced <br />summer flows, and a two-month period of steady flows in the winter. <br />• Seasonally Adjusted Steady Flow: The seasonally adjusted steady <br />flow scenario would be similar to the other seasonally adjusted <br />scenarios, but hourly releases would be constant during the day for each <br />season or period specified by the USFWS Biological Opinion (USFWS <br />1992). This scenario would feature a month-long sustained spring <br />release and reduced summer flows.