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4.0 Revegetation Methods - Reclaimed Irrigated Pastureland <br />A significant acreage of the revegetated areas will be returned to a postmining land use of <br />irrigated pasture including lands within the permit area which have not been disturbed, but which <br />have had irrigation water shut-off in order to better control and manage surface and ground water <br />within the mine area during operations. Map 2.05.4-5 shows all Reclaimed Irrigated Pasturelands <br />as well as all other post -mine land uses. <br />4.1 Topsoil Replacement - General Comments <br />Topsoil replacement operations may be carried out during most of the year, the exception being <br />those periods when wet conditions would preclude handling of the topsoil materials. Prior to <br />replacement of topsoil, the graded spoil will be ripped to reduce compaction. Detailed topsoil <br />handling and replacement plans are provided in Section 2.05.4(2)(d), Topsoil (Redistribution). <br />4.2 Irrigation Designs <br />Areas that are to be returned as Reclaimed Irrigated Pastureland will be irrigated using either <br />sprinkler irrigation or flood irrigation. Map 2.05.4-5 shows all irrigation layouts for the areas <br />west of 2700 Road. All Reclaimed Irrigated Pastureland fields west of 2700 Road and north of <br />BB Road will be flood irrigated, but a sideroll sprinkler design for the Benson East property was <br />included as part of determining the amount of water available for Benson West (west of 2700 <br />Road). <br />All calculations for both flood and sideroll sprinkler irrigation are shown in Attachment <br />2.05.4(2)(e)-9 for the Reclaimed Irrigated Pastureland reclaimed areas. These calculations were <br />done 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 Reclaimed <br />Irrigated Pastureland, 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 Reclaimed Irrigated <br />Pastureland east of 2700 Road (Staats and Benson East). The designs are based on the NRCS <br />calculations with accounting for 6 days out of 7 days for operating the system, allowing one day <br />off for rest, unforeseen issues, system maintenance, family commitments, etc. <br />January 2015 TR -66 2.05.4(2)(e) - 14 <br />