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I I I I I I I I I I I I I I I I I I I Section 4 - Existing C%mt!o lVii/er SI//lfI/ies Future water development in the Colorado River and South Platte River Basins is uncertain due to potential environmental constraints. ""'Po / ~ I \ RI.., 6 tI'~lc'lfl ",P' ftl'l,r p,\\'8r \Itl1\CSI'\ Pueblo ArQn.... River 2 D D D Minimum of 450,000 acre feet of developable water supplies Additional water development potential constrained due to Compact and Endangered Species issues Basins currently near limit of depletions based on In-State Use and Interstate Compacts Figure 6 Future Water Development Potential New supply development in the Colorado River Basin must also support the Recovery Implementation Program for Endangered Fish Species in Ihe Upper Colorado River Basin (the Recovery Program). The Recovery Program will require the appropriation of recovery instream flows by the Slafes of Colorado. Wyoming and Utah to improve the habitat of the Colorado squawfish. hump- back chub, bony tail chub and razorback sucker. Although Colo- rado has not determined its total in stream flow appropriations for the Recovery Program, the amount will be large and will sig- nificanlly impacl when future water rights will have waler avail- able to them. As a result, Colorado envisions needing to be able to fully manage all its wafer resources in the Colorado River Basin 10 fully develop its compact apportionment while meeting Ihe goals of Ihe Recovery Program. The South Plalle River compact prevents diversion by wafer rights in the lower reach (east of the Washington-Morgan County line) junior 10 June 14. 1897, during the irrigation season (April I to October 15) when the !low al the Julesburg gaging station is less 4-4 __ COLoraDo ,._ Farm Bureau