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<br />0025'~8 <br /> <br />4. Socio-economic <br /> <br />Managers and stakeholders have identified 43 resources within these categories that should be <br />considered when making decisions concerning operations associated with Glen Canyon Dam. <br /> <br />In contrast to the straightforward hydrologic triggering criteria, the development of criteria for <br />other resources requires more consideration than just whether the resources are there or not. <br />Many resources of concern are inherently dynamic and are continually responding and reacting <br />to local as well as system-wide inputs. Evidence of the effects of input (catastrophic or <br />otherwise) for many resources in the river corridor can be immediate, like the loss of a whole <br />population due to a rock fall, or the effects may take a generation or more to be recognized (e.g., <br />endangered fish populations). With this in mind, a criterion for most biological, physical and <br />cultural resources directly affected by releases (i.e., resources found within the anticipated stage), <br />is a knowledge of the antecedent conditions and subsequent conditions. <br /> <br />Developing decision criteria for dam releases pertaining to resources associated with the <br />Colorado River corridor downstream of Glen Canyon Dam requires defining the purpose for the <br />criteria. In some cases the purpose may be to develop criteria that helps determine how to do the <br />most good for all resources. Conversely, the purpose may be to help one resource and "do no <br />harm" to the other resources. In light of anticipated high-sustained releases, the AMWG has <br />agreed that sediment conservation is desirable. Efforts for sediment.conservation includes <br />staging something like the BHBF described in the EISIROD, with the magnitude and duration <br />being approximately 45,000 cfs for 2 to 4 days, sometime between the months of January and <br />July. <br /> <br />Aspects associated with the identified resources that require consideration are: <br /> <br />· Legislativellegal compliance issues (e.g., endangered species and biological opinion <br />requirements, SHPO requirements) <br /> <br />· Temporal issues (i.e., critical timing for biological processes like spawning, nesting, <br />flowers, or seed dispersal), and <br /> <br />· Safety and economic issues (whitewater rafting, sport fishing, loss of revenues). <br /> <br />The sequence in which one deals with these aspects can vary from a single resource perspective, <br />with each resource carrying equal weight, or from a more holistic perspective, recognizing that <br />resources are interdependent and work in a Dbottom-upD and Dtop-downD interactive fashion. In <br />other words, some resources may be keystone resources in the system and require more <br />consideration than others for the health or integrity of the system. <br /> <br />To some extent, a relative weighting of resources might be done by considering the force and <br />effect of various laws and regulations. There are no fewer than 48 Federal and State statutes, <br />compacts, executive orders, court decisions, treaties and decrees that apply or affect how Glen <br />Canyon Dam is operated. As explained on page 8 of the final EIS, DFederal statutes establish a <br />number of responsibilities for the Secretary of the Interior. Many responsibilities are specifically <br />mandated, while discretionary authority is given for dealing with others.D <br /> <br />For example, the 1973 Endangered Species Act and the 1966 National Historic Preservation Act <br />