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analysis is not performed by either the PFM or the Q &CM, but could easily be performed within a <br />database or spreadsheet environment. <br />The other field within histgaug.dbf that needs further explanation is COOPR_GGG (Field # 5). <br />COOPR_GGG is the field name representing the river gauge flow at Cooper Bridge. Cooper <br />Bridge spans the South Platte at a point approximately 5.7 river miles up river from the Balzac <br />Bridge (Morgan County - Washington County boundary line). The gauging site at Cooper <br />replaced the Balzac site on October 1, 1987, following the decommissioning of the Balzac Bridge. <br />Often, the 'new' Cooper gauging site is still referred to as the Balzac gauge. To eliminate any <br />misinterpretation, the sites have each been given their respective names. BALZAC_GGG, <br />therefore, contains gauge values up to September 30, 1987, and is empty thereafter, while <br />COOPR_GGG contains gauge flow values from October 1, 1987, to present. <br />In reading the above discussion regarding Historical Data Tables used for the Lower South Platte <br />River, it may have become evident that daily flow values for a particular structure can be acquired <br />from more than one database. Such is the case with many of the river diversion values (located in <br />both comm_dly.dbf and histdiv.dbf) and river gauging values (located in both comm_dly.dbf and <br />histgoug.dbf). Although these values appear in multiple databases, it is important to remember that <br />these values are derived differently. When more than one flow value is available, extra precaution <br />must be taken to only include one such value in the point flow calculations. This is done by <br />altering the True -False UTILIZE field in cntrltbl.dbf so that only one flow value for each structure <br />is employed. <br />Table 6 below summarizes the type of data utilized in computing the subreach gains and point <br />flows (point flow analysis) for the Lower South Platte River and from which database the <br />information is obtained. <br />Table 6 Database source of point flow data for the Lower South Platte River. <br />Data Type <br />Corresponding Database <br />Lower South Platte River Gauge Flows <br />histgaug.dbf <br />Canal/Ditch Diversion Flows <br />histdiv.dbf <br />Reservoir /Canal/Ditch Releases to <br />histdiv.dbf <br />Lower South Platte River <br />Creek/Stream/Drain Inflows to Lower <br />comm_dly.dbf <br />South Platte River <br />Recorded River 'Drying Points' <br />comm_dly.dbf <br />26 <br />ptflguid wpd 1 <br />