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(a) Proposed Stoneridge Drive/I-680 interchange and auxiliary <br /> <br /> lanes on 1-680 between Stoneridge Drive and 1-580 <br /> <br /> (b) Proposed Hacienda Drive/I-580 interchange and auxiliary <br /> lanes on 1-580 between Hopyard Road and Santa Rita Road <br /> <br /> (c) Modifications to the existing Santa Rita Road/I-580 <br /> interchange <br /> <br />It is recognized that the NPID proposals will have an effect on <br />nearby interchanges, particularly the 1-580/I-680 interchange. <br />Funding and programming of improvements to the 1-580/I-680 <br />interchange are unknown at this time; however, inclusion of <br />upgrading studies to the 1-580/I-680 interchange is necessary to <br />insure compatibility with the NPID proposals. Compatibility with <br />and effects upon the existing Foothill Road/I-580 interchange and <br />potential interchanges at Amador Valley Boulevard/I-680 and at Las <br />Positas Boulevard/I-680 will also be addressed in the Environmental <br />Document. <br /> <br /> - 2- <br /> <br /> <br />