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Show 3. Anderson Bottom ( seep) 4. Horse Canyon ( 0.10 gpm) 5. South Fork ( seep) 6. Pictograph ( 2.0 gpm) 7. Jasper Canyon ( seep) 8. Water Canyon ( 1.8 gpm) Quantification of the instream and other flows claimed necessary for recreation area purposes may be required in the Colorado River and San Rafael River adjudications in Utah. In addition, the portion of Glen Canyon NRA located in Arizona is yet to be adjudicated. With Arizona currently engaged in the adjudication of water rights throughout the state, it is reasonable to assume that this portion of Glen Canyon NRA will also be adjudicated in the near future. In addition to federal reserved water rights for instream flows and other resource protection purposes, the United States will need to claim federal reserved rights for consumptive administrative uses. The claims of the National Park Service to water rights, especially federal reserved rights, in Glen Canyon NRA have been and will need to be made in light of the purposes of the NRA and its cooperative agreement with the Bureau of Reclamation. Additional actions related to water rights will include responses to potentially damaging external water development proposals. Such response will entail the determination of the type, magnitude, and location of potential injury and may involve the further quantification of federal reserved water rights. The immediacy of this problem, in the sense of timely response, was addressed above. The United States must assert and defend its claim to water rights or face the possibility of losing them. III. B. 2. Management alternatives and impacts. Alternative A: No action If the National Park Service does not fully participate in the adjudication of water rights located in river basins that encompass parts of Glen Canyon NRA, the legal right to make use of water for certain purposes could be forfeited. Furthermore, use of water by other appropriators may affect the Service's ability to accomplish its mission if the acquisition of non- federal water rights is not feasible. 25 |