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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />In addition, the Secretary win make unused apportionment available to pennit an authorized <br />entity in the Lower Division States to store unused Colorado River water off stream for an <br />authorized entity in another Lower Division State from which the unused apportionment is made <br />available, Storage credits would be developed from the stored water. Later, an entity in the <br />State in which the water is stored will reduce its Colorado River water diversions to allow an <br />entity in another Lower division State to receive Colorado River water in order to redeem its <br />storage credits, Unused entitlement or apportionment that is made available for storage <br />off stream in Arizona will be moved through CAP facilities, Reclamation understands that when <br />an authorized entity in Nevada redeems storage credits the water will be delivered through <br />existing delivery facilities, When water is moved through an existing conveyance system and <br />into a pennitted storage facility, as part of an interstate agreement, Reclamation will detennine <br />what NEP A compliance has been accomplished for those facilities, analyze potential impacts, <br />and detennine the appropriate NEP A compliance documentation, <br /> <br />The A WBA has access to sufficient off stream storage capacity to offer some storage capacity in <br />existing sites to authorized entities in California and Nevada under interstate storage agreements <br />(Arizona 1996, ARS 1996, AWBA 1997), However, off stream storage in Arizona for an <br />authorized entity from another Lower Division State must occur where there is adequate capacity <br />to store the water without needing to develop new storage or delivery facilities. <br /> <br />Nevada authorized entities would like to store as much as 1 maf(at 100,000 af7year) which <br />represents a little more than 1% of the total average deliveries to the Lower Division States and <br />Mexico over the next 10 years. It is unlikely that Nevada authorized entities will enter into <br />interstate storage agreements to store water for entities from other States due to limited off stream <br />storage capacity in Nevada. The groundwater recharge capacity of existing injection wells in the <br />Las Vegas Valley, Nevada is approximately 20,000 afper year. The total off stream storage <br />capacity of the Southern Nevada Groundwater Bank is estimated to be approximately 350,000 af, <br />Nevada entities are expected to use their limited offstream storage capacity to store Colorado <br />River water on their own behalf and not for users from other States, <br /> <br />California entities, who collectively have been exceeding their 4.4 maf apportionment, are <br />unlikely to store water in Arizona until they first ensure that they have adequate water available <br />to meet their immediate demand, It is not known to what extent State-authorized entities in <br />California may store water for interstate banking purposes in California, It is anticipated that <br />any off stream storage in California will be stored on the California users' own behalf and not for <br />users from other States, <br /> <br />No Action Alternative <br /> <br />Under the No Action Alternative, Arizona will continue to store its own unused apportionment <br />off stream through the A WBA and such water will not be available to the other Lower Division <br />States, Nevada's diminishing unused apportionment will continue to be available to California <br />and Arizona in a normal year. In Arizona, an analysis was done by the A WBA that concluded <br />sufficient off stream storage capacity exists to accommodate the quantity of Colorado River <br /> <br />LC Region DEAll <br /> <br />13 <br /> <br />12/97 <br />