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,~ <br /> <br />(b) Proposed Hacienda Drive/I-580 interchange and <br />auxiliary lanes on I-580 between Hopyard Road and <br />Santa Rita Road <br />(c) Modifications to the existing Santa Rita <br />Road/I-580 interchange <br />It is recognized that the NPID proposals will have an effect on nearby <br />interchanges, particularly the I-580/I-680 interchange. Funding and <br />programming of improvements to the I-580/I-680 interchange are unknown <br />at this time; however, inclusion of upgrading studies to the <br />I-580/I-680 interchange is necessary to insure compatibility with the <br />NPID proposals. Compatibility with and effects upon the existing <br />Foothill Road/I-580 interchange and potential interchanges at Amador <br />Valley Boulevard/I-680 and at Las Positas Boulevard/I-680 will also be <br />addressed in the Environmental Document. <br />It is anticipated that a single MOU covering the design and con- <br />struction stages of all the projects will be prepared. Cooperative <br />agreements will follow for all work requiring expenditure of funds or <br />staff services by Caltrans. Four cooperative agreements are antic- <br />ipated covering: <br />- All three projects between approval of the Project Study <br />Report (PSR) and approval of the revised Freeway Agreement <br />- Design and construction of the Stoneridge Drive/I-680 project <br />-2- <br />