Laserfiche WebLink
Creek. Calls historically recorded on the South Platte River above the Clear Creek <br />confluence often included Water District 7 (Clear Creek) as a District Affected <br />(e.g., Burlington Ditch call affecting Water District 7). According to Division 1 <br />personnel, these calls were bypass calls to the Jay Thomas Ditch or Western <br />Mutual Ditch. The Jay Thomas Ditch is typically listed as the location of the <br />calling structure in recent call records. Therefore, a new comment "bypass to the <br />Jay Thomas Ditch" was added to the historical call records when the calling right <br />was located above Clear Creek and Water District 7 was listed as a District <br />Affected. <br />• Administration of the lower South Platte River basin is typically controlled by the <br />senior right at the Sterling No. 1 Ditch (7/15/1873 - 113.547 cfs), located on the <br />South Platte River in Water District 64. A number of ditches (i.e., Bijou Canal, <br />Fort Morgan Canal, Upper Platte and Beaver Canal, and Lower Platte and Beaver <br />Canal) in Water District 1 have water rights with 1882 priority dates or 1882 and <br />1888 priority dates. These water rights, in particular the 1882 rights, are <br />frequently operated as bypass calls to the Sterling No. 1 Ditch. Per Division 1 <br />personnel, operation of these bypass calls can be determined from diversion <br />records. Therefore, daily diversion records were reviewed for the ditches below <br />the ditch placing the 1882 call. When these ditches were limited to diversion of <br />their 1882 water rights and not allowed to divert their 1888 water rights, it is an <br />indication of a bypass call. Therefore, a new comment was added to the call <br />records, when downstream diversions were limited, by signifying the calling ditch <br />"bypass to the Sterling No. 1." An `X' in the Districts Affected for Water District <br />64 was added for consistency with current call standards. <br />An algorithm was created to estimate OFF Dates for the list of 1950 to 1980 historical <br />calls. Simulation of the following algorithm using the revised, electronic call data <br />resulted in a complete set of OFF Dates for recorded South Platte River calls over the <br />SPDSS study period: <br />a. Beginning in 1950, read ON date, administration number, and location of calling <br />water right (including downstream locations for bypass calls). All recorded calls set <br />to be placed at 8 a.m. of the ON date in order to address the lack of time of day in the <br />record and to simplify the analysis. <br />b. Read ON date, priority, and location of subsequent calling right listed in historical <br />record. <br />c. If the subsequent calling right (Step 3b) is a downstream senior right, turn the original <br />call OFF on the day the downstream senior call was placed. Go to Step 3a for next <br />calling water right in historical record without OFF date. <br />d. If the next calling right is a downstream junior right, allow the original call and the <br />downstream, junior call to both be ON. Go to Step 3b to read subsequent calling right <br />to estimate OFF date for original call. <br />4. Following the logic of reviewing daily diversion data for the Water District 1 ditches <br />identified above (Step 2c), Division 1 personnel requested LRE fine-tune the release <br />dates for the 1882 calls by reviewing upstream diversions. When the upstream ditches <br />Page 6 of 14 <br />