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2000 Flows and EA Releases <br />Flows at Grand Island during the 2000 water year are illustrated in Figure 1. The first EA <br />releases were requested on June 10, 2000. Water Year 2000 EA releases are illustrated in Figure <br />2 and described in detail below. <br />Water Year 2000 EA Releases <br />Date s Amount Comments <br />6-11 to 6-19 400 cfs Releases were requested to keep flows between 1000 cfs and 1200 cfs, in <br />accordance with Service-recommended flow targets, for maintenance of <br />fish/aquatic community health and tern forage base and to promote tern and <br />plover nesting at higher elevations. , <br />6-20 150 cfs Termination of the 400 cfs EA releases was requested on 6-20 in anticipation <br />of increased flows due to rainfall events. Although CNPPID was not required <br />to terminate flows until6-21 (24-hour notice requirement for EA requests), <br />they sta.rted reducing EA releases on 6-20. <br />6-21 to 6-24 0 cfs See comment above. <br />6-25 to 7-3 400 cfs Releases were again requested to augment flows, expected to decrease below <br />1000 cfs within the week. At the end of June, flows at Grand Island had <br />dropped well below the 1,000 cfs mark. The goal of maintaining flows <br />between 1,000-1,200 cfs to meet wet or average flow targets or to encourage <br />tern and plover nesting at higher elevations was discontinued because too <br />much EA water would have been required to maintain that level. In addition, <br />local rainfall events result in uncontrollable spikes in flows above 1,200 cfs <br />which would preclude any benefit for tern and plover nest initiation. <br />Augmentation of flows to reach the Service dry-year flow target of 800 cfs at <br />Grand Island for maintenance of fish/aquatic community health and tern <br />forage base was pursued. <br />7-4 and 7-5 550 cfs An additional 150 cfs was requested because 400 cfs was not maintaining 800 <br />cfs at Grand Island,. <br />7-6 to 7-21 400 cfs Releases were reduced in anticipation of higher flows predicted to occur for a <br />short period (less than 7 days) due to rainfall events. Terminating all EA <br />releases in reaction to short-term flow increases at the lower end of the <br />managed area proved problematic because of the 7-day time interval for <br />releases from Lake McConaughy to reach Grand Island. <br />Water Year 2001 EA AOP 4 January 3, 2001