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Exhibit 3 (cont'd). COLORADO RIVER DECISION SUPPORT SYSTEM (CRDSS) <br />Historic Data Extension Feasibility. <br />Streamflow and climate gages used iu the Water Resources Planning and CU Models. <br />San Juan River Basin <br />Streamflow <br />NTo. of ~a;?es <br />Data Extension Date with data to ext. date' <br />1960 30 57 <br />1950 28 53 <br />1940 28 53 <br />1930 14 26 <br />1920 10 19 <br />1910 5 9 <br />Total gages in model: 53 <br />Precipitation <br />NTo. of ~aQes <br />Data Extension Date with data to est. date' <br />1960 16 89 <br />1950 15 83 <br />1940 4 22 <br />1930 4 22 <br />1920 3 17 <br />1910 3 17 <br />Total gages in model: 18 <br />Temperature <br />No. of ~aaes <br />Data Extension Date with data to ext. date' <br />1960 14 88 <br />1950 11 69 <br />1940 4 25 <br />1930 4 25 <br />1920 3 19 <br />1910 3 19 <br />Total gages in model: 16 <br />~ The gage record may not be complete from the cuiTent calibration period (1975 - 1991) to the <br />extension date. Gaffes were chosen based on whether they had data fl'om the extension date <br />before, to, or beyond the calibration period. <br />Appendix E E-39 <br />