2019-07-30_PERMIT FILE - M1996052

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L.G. Everist Combined SWSP Page 7 of 16 March 14, 2018 Table G- 1.41 Rural Ditch HCU Results Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov JDecTotal Farm Headgate 0 0 0 0.6 16.6 28.2 42.5 27.8 11.1 2.3 0 129.1 Delivery On Farm Depletion of 0 0 0 1.4 7.5 14.5 16.8 12.9 6.9 1.5 0 0 61.6 Surface Water Surface 0 0 0 0.2 5.4 9.4 15.3 10.0 3.9 0.9 0 0 45.2 Return Flows Ground Water Return 0 0 0 0.1 2.7 4.7 7.5 4.9 1.9 0.5 0 0 22.2 Flow Lagged Ground 1.5 1.3 1.1 0.9 1.0 1.5 2.3 3.1 3.1 2.6 2.1 1.7 22.2 Water Return Flows Total Return 1.5 1.3 1.1 1.1 6.4 10.9 17.6 13.1 7.0 3.5 2.1 1.7 67.4 Flows Average Net -1.5 -1.3 -1.1 -0.6 10.2 17.3 24.9 14.8 4.0 -1.2 -2.1 -1.7 61.6 Depletion Return Flow 1.1% 1.0% 0.8% 0.4% 61.3% 61.3% 58.6% 53% 36.3% 1.0% 1.6% 1.3% NA Factor For the months of May through September the daily return flow obligation will be determined by multiplying the applicable monthly return flow factor by the total daily deliveries associated with the subject shares. For the months of October through April the daily return flow obligation will be determined by multiplying the applicable monthly return flow factor by the previous year's (November through October) total deliveries associated with the subject shares, and then divided by the number of days in the month. Based on the historical study period of 1950 through 1997, Table G above provides a monthly summary of the estimated yield associated with the subject 1.41 Rural Ditch shares. The projected annual farm headgate delivery of the subject 1.41 Rural Ditch shares is estimated to be 129.1 acre-feet. The dry-year HCU analysis for the 1.41 shares was determined to be 76.2 acre-feet for 1977 which is greater than the long-term average. The average over 1954-1957 drought was determined to be 64.9 acre-feet. Therefore the average years were used in the HCU analysis. The historical return flow obligation of the 1.41 Rural Ditch shares will be maintained by the plan. LG Everist operates an augmentation station from the Rural Ditch to the St. Vrain (WDID 0502305). The delivery location is below the Last Chance Ditch headgate and above downstream calling water rights located on the South Platte River. The Applicant proposes that deliveries will be limited to April through October and will be limited to the maximum monthly and annual farm headgate deliveries. The maximum monthly and annual farm headgate deliveries cannot be granted in a SWSP, since a SWSP is only approved for a one or two year period. Therefore, for the period of the SWSP, the Applicant's share delivery will be limited to the historical monthly average and annual average farm headgate delivery as summarized in Table G. The accounting for this plan must be updated to show the farm headgate deliveries for the Rural Ditch shares and the associated monthly and annual volumetric limits.