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crosting, or salt precipitation is occumng as a result of irrigation. If these problems do arise irrigation is <br />discontinued and (1) the imgation system is adjusted and/or (2) fitting mitigation measures, if necessary, take <br />place. At no time are the reclaimed soils allowed to exceed field capacity upon/during application of irrigation <br />waters. <br />Irrigation records are kept at the mine to track application rates of imgation waters on reclamation parcels. <br />Once the application rates shown in the imgation schedule (Table 906.B(5)-4 (Imgation Schedule)) are <br />achieved, irrigation is discontinued. These records are available at the mine for review by MMD inspection <br />and permitting staff. <br />Table 906.(5).4 Irrigation Schedule <br />Growin Season Irri ation Levels Duration <br />First 1 to 2 inches depending on Initial Application to get <br /> soil e and de th Soil Profile wet <br />First 0.5 inches Every 2 to 3 days for 1st <br /> four to 6 weeks following <br /> initial seedin . <br /> 1.0 inches I Every week for the duration <br /> of the owin season. <br />Second 1.5 inched Every 5 weeks throughout <br /> the owin season. <br />I Rate maybe reduced depending on precipitation levels and temperatures. <br />Dave Clark <br />NM MMD <br />505-476-3416 <br />david.clark(a~state.nm.us <br />From: Mathews, Dan [mailto:daniel.mathews@state.co.us] <br />Sent: Wed 12/14/2005 12:14 PM <br />To: Clark, David, EMNRD <br />Subject: Irrigation for establishment <br />Hi Dave, <br />I thought I would run this by you, as you probably have more experience with it at a couple of the <br />mines down there than we do. We have a coal mine out by Nucla along the San Miguel River in the <br />far western hinterlands, which has only recently come under my purview. Most of their mining is in <br />irrigated pasture and alfalfa and their primary reclamation is directed to those uses. But they have <br />some incidental areas of dryland pasture. They are in a 10-11 inch annual precip zone, and they <br />have historically irrigated their dryland areas (sprinkler system) for the first few growing seasons for <br />establishment, because they experienced some seeding failures years ago on some dryland <br />12/14/2005 <br />