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<br />~ <br /> <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 />quarter full and the Rio Grande Reservoir was assumed to be one-half <br /> <br />full at the beginning of the modeling period. <br /> <br />3. Model Results <br /> <br />a. Scenari 0 I <br /> <br />Scenario I represents present conditions operating under the <br />exi sti ng Ri 0 Grande Compact requi rements, and di verti ng runoff into <br />storage when fl ows in the Rio Grande River at the Del Norte gage <br />exceed 2,285 cfs. Continental reservoir is restricted to 15,000 acre- <br />feet of storage and Santa r4aria reservoir is restricted to 32,000 <br />acre-feet of storage. Once the reservoirs fill, the model routes all <br />runoff downstream. This scenario results in higher flow in the Rio <br />Grande River during May and June but less water available for irriga- <br />tion during July, August, and September to "finish crops." <br /> <br />The purpose of the two operating scenarios was to detennine the <br />benefit of repairing the dams, namely the additional acre-feet of <br />water that would be available to SMRC shareholders for later season <br />irrigation if full storge was pennitted. Since the San Luis Valley is <br />an over-appropriated system and demands almost always exceed water <br />availability, the basis of benefits is the reduction in shortages <br />achieved by repairing the dams. <br /> <br />IV - 17 <br />