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Historical Calls -South Platte River <br />For historical calls to be most useful in the types of analyses consultants and Division 1 <br />personnel perform, the following four types of information should be included: <br />1. Calling right and priority date. The priority date is represented with an administration <br />number, which was developed by the Division of Water Resources to rank water rights <br />by accounting for both appropriation dates and prior adjudication dates. <br />2. Location on the river where call is placed (note -may not be the actual headgate location <br />of the calling right, as with bypass calls). <br />3. Date call was initiated. <br />4. Date call was released. <br />Historical call records include indication of the Water Districts affected by the call. This <br />information was useful in identifying the location of historical calls and bypass calls that were <br />not explicitly recorded. <br />Call records are available in HydroBase for the South Platte basin starting in 2000. Les Dalby <br />with the Division 1 office provided an electronic file summarizing the River Call sheets over the <br />1930 to 2004 period. Not all of the information tabulated above has been included in the <br />historical main stem South Platte River call records summarized on an annual basis by the Water <br />Division 1 office. The South Platte compact call has not been recorded prior to 2005. As noted <br />above, calls placed by tributary basin water rights have not historically been recorded by the <br />Division 1 office. Although there are some Clear Creek calls in the early records, tributary basin <br />calls did not start being recorded consistently by the Division 1 office until the mid-2000s. <br />The River Call sheets were generally recorded as follows during the period from 1950 to 1980: <br />1. Calling right and priority (administration number). <br />2. Location of the call being "abv St Vr" or "blw St Vr" (above and below, respectively, the <br />St. Vrain Creek confluence with the South Platte River) are included sporadically for the <br />pre-1981 period in the Division 1 call records electronic file. These notifications are <br />typically not included in the summary River Call sheets. <br />3. Date call initiated (the ON Date) and Appropriation Date listed for calling water right <br />along with tabulation of which Water Districts received call cards. Call records over this <br />period typically did not include the time of day the call was placed (e.g., 8 a.m.). <br />4. Date call was released (the OFF Date) is not listed, except for cases when the active call <br />is listed as "No Demand" that, in certain cases, lists the ditch name and/or the <br />appropriation date of the call being released. <br />Page 3 of 14 <br />