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Cheryl Signs, P.E. Page 9 <br /> Durham Combined SWSP <br /> August 12, 2014 <br /> Ground <br /> Water <br /> Return <br /> Flows 0 0 0 7.7 78.3 109.7 134.4 134.5 120.2 11 0 0 595.6 <br /> Lagged <br /> Ground <br /> Water <br /> Return <br /> Flows 9.7 7.5 5.9 9.2 52.3 86.1 110.6 119.4 114.6 48.6 19.4 12.6 595.8 <br /> Average Net <br /> Depletion -9.7 -7.5 -5.9 10.2 86.6 162.3 234.0 196.6 103.2 -18.1 -19.4 -12.6 720 <br /> Return Flow <br /> Factor 0.7% 0.5% 0.4% 43% 34% 31% �29% �34 47% 3.3% :1:3�-�/ .9% NA <br /> Return flow factors for the months of October through March are the percentage of last year's farm headgate <br /> delivery; those from April through October are the percentage of the month's farm headgate delivery. <br /> Based on the historical study periods of 1947 through 1974, Table 6 above provides a monthly <br /> summary of the estimated yield associated with the subject 5 shares of the Last Change Ditch. <br /> Goddinq Ditch (Highland South Side Ditch) <br /> There are 183 outstanding shares in the Godding Ditch Company, a mutual ditch company, <br /> which was decreed as Highland South Side Ditch. A summary of the Godding Ditch (WDID 0600532) <br /> water rights is included in the table below: <br /> Decree Adjudication Date Appropriation Date Decreed mount VCI Interest(cfs) <br /> 06/02/1982 06/02/1882 06/01/1865 (Cfs 6.538 <br /> 06/02/1882 99.7 <br /> enlargement 06/02/1882 06/01/1868 52.5 3.443` <br /> en <br /> Not used in the HCU analysis <br /> The Applicant owns 12 shares (6.538 cfs) of the outstanding 183 shares of the Godding Ditch <br /> which are included in the SWSP amendment. Water from the 12 shares of the Godding Ditch was <br /> historically used to irrigate a portion of the Seewald parcel located in Section 6, Township 2 North, <br /> Range 67 West of the 61h P.M., totaling approximately 161 acres. The crops irrigated were corn, sugar <br /> beets, beans and pasture grass. The land previously irrigated by the Godding Ditch is developed as a <br /> subdivision and is not longer irrigated with the ditch. The Applicant submitted a historical consumptive <br /> use ("HCU") analysis with the SWSP amendment request. The period of analysis was 1970 through <br /> 2002. For this period, diversion records for the Godding Ditch were downloaded from Colorado <br /> Decision Support System ("CDSS"). The average consumptive use from the dry years of 1977, 1994 <br /> and 2002 was less than the average period, therefore the average dry year results were used. The <br /> Applicant proposed an initial application efficiency of 75 percent for each farm based on review of aerial <br /> photos of the farms and field visits to examine site specific conditions. The portion of the 75% delivery that <br /> could not be used by the immediate monthly crop demand was stored in the soil bank. This initial efficiency <br /> will be accepted for this SWSP plan period, however any renewal request must provide information to <br /> support the claimed efficiency, including the type of flood irrigation, soil properties, aerial photos, slopes, <br /> irrigation practices, technical references specific for the parcels that the 12 shares of the Godding Ditch <br /> were used. Based on the Applicant's information, local weather data was available from Longmont <br /> weather station was used in the HCU analysis. The ditch loss used in the HCU was 15 percent based <br /> on the ditch location, its length and previous experience. <br /> The HCU results based on the dry years of 1977, 1994 and 2002 are summarized below: <br />