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5.2 Irrigation Designs <br />Areas that are to be returned as Irrigated Pasture will be irrigated using either sprinkler irrigation <br />or flood irrigation. Map 2.05.3(3)-3 shows all irrigation layouts for the areas west of 2700 <br />Road. All Irrigated Pasture west of 2700 Road and north of BB Road will be flood irrigated, but <br />a sideroll sprinkler design for the Benson East property was included as part of determining the <br />amount of water available for Benson West (west of 2700 Road). <br />All calculations for both flood and sideroll sprinkler irrigation are shown in Attachment <br />2.05.4(2)(e)-9 for the Irrigated Pasture reclaimed areas. These calculations were completed <br />using irrigation design worksheets from the Colorado Irrigation Guide and National <br />Engineering Handbook Sec. 15, Chap. 11. Flood irrigation will be supplied by 4 inch to 10 inch <br />supply lines. The Lloyd and Benson West properties will have some portions of Irrigated <br />Pasture, based on the amount of shares that are available for each landowner. <br />Benson has 12 shares available for the Benson West property, out of the 44 shares total that he <br />owns. The other shares are committed to two other Benson parcels that are in <br />Irrigated Pasture east of 2700 Road (Staats and Benson East). The designs are based on the <br />NRCS calculations with accounting for 6 days out of 7 days for operating the system, allowing <br />one day off for rest, unforeseen issues, system maintenance, family commitments, etc. <br />This design can be seen in Attachment 2.05.4(2)(e)-9. According to the design worksheets, the <br />Benson West property will be flood irrigated at a rate of 0.97 shares/acre to cover an area of <br />12.40 acres from 12 shares. <br />New Horizon has 24 shares available for Irrigated Pasture on the Lloyd property. The designs <br />are based on the NRCS calculations with accounting for 6 days out of 7 days for operating the <br />system, allowing one day off for rest, unforeseen issues, system maintenance, family <br />commitments, etc. This design can be seen in Attachment 2.05.4(2)(e)-9. According to the <br />design worksheets, the Lloyd property will be flood irrigated with a total of 24 shares spread <br />over 25.62 acre. This is a flood irrigation flow of 0.94 shares/acre. <br />5.3 Irrigated Pasture Seed Mix <br />Seed Mixes 45 and #6 are the Irrigated Pasture seed mixes depending on whether the site is well <br />drained or poorly drained. All species contained in Seed Mixes #5 and #6 are introduced. The <br />introduced species support the proposed post -mining land use, and the referenced literature and <br />individuals (presented in the following paragraph) support the fact that these species are desirable <br />and necessary to achieve the post -mining land use. <br />Page 22 May 2016 (TR -75) <br />