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environment to a reasonable degree, and are adjudicated and <br /> administered within the State's water right priority system. <br /> ii. Delivery of water to a downstream demand: Water released from <br /> storage or otherwise made available from upstream sources can be <br /> delivered to downstream demands. Such deliveries can be <br /> "shepherded" (i.e., protected) through the subject stream segments. <br /> A primary example is the release of water from Green Mountain <br /> Reservoir pursuant to the 1984 Green Mountain Reservoir <br /> Operating Policy for delivery to irrigation demands in the Grand <br /> Valley near Grand Junction. <br /> Existing senior water rights: The Shoshone and Cameo groups of <br /> senior water rights generally control the administrative call within <br /> the Colorado River Basin. These water rights are located <br /> downstream of the subject stream reaches; therefore, an <br /> administrative call during dry or average conditions by these water <br /> rights can curtail diversions from upstream junior water rights or <br /> require the release of water from storage to replace those junior <br /> diversions. This administrative call generally results in additional <br /> stream flow through the subject stream segments than would exist <br /> in the absence of the administrative call. <br /> iv. Upper Colorado River Endangered Species: This is an existing <br /> mechanism by which water is released or bypassed from upstream <br /> reservoirs for the benefit of the endangered fish species in the <br /> Grand Valley on a temporary basis. The water deliveries are <br /> protected through the subject stream segments downstream <br /> through the 15-Mile Reach of the Colorado River. During peak <br /> runoff, bypasses from upstream reservoirs can provide peak <br /> flushing flows through the subject stream segments. During dry <br /> periods in late summer or early fall, releases from upstream storage <br /> to supplement low flows in the 15-Mile Reach can significantly <br /> supplement flows in the subject stream segments. <br /> Chanaed Circumstances: The Plan includes mechanisms to address <br /> changed circumstances that could impact the effectiveness of these long- <br /> term measures in protecting the ORVs. These are included as part of the <br /> detailed Milestones in Attachment B to this Outline. <br /> c. Tier 2 Cooperative Measures <br /> As a complement to the long-term protection measures, or in the event <br /> that ORV Indicators or Provisional or Refined Resource Guides are not <br /> Page 9 of 16 <br />