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Seneca Coal Company Weed Management Plan <br />Prevention Methods <br />1. Prevent new noxious weeds from becoming established by stopping <br />seed production. Mechanical, chemical, or biological control is <br />necessary prior to seed set. <br />2. Wash and clean all vehicles on the site to prevent accidental <br />transport of noxious weed seed. Wash and clean all farm <br />equipment and herbicide equipment before moving to any new <br />sites. Cleaning sites are designated at each mine site, Seneca II, <br />Yoast, and Seneca II-W facilities areas. <br />3. Plant only certified weed-free seed. <br />4. Buy and import materials, (gravel, sand, topsoil, etc.) only from <br />weed-free sites. <br />5. Monitor weed control efforts on an annual basis. Survey the <br />property to detect new invasive species or new establishment of <br />existing species. The spring survey and mapping will be done prior <br />to weed control. A follow-up survey will be conducted after control <br />measures to insure good control and to determine if additional <br />measures are needed. <br />6. All treated areas will be re-seeded with the approved seed mix to <br />re-establish a competitive and beneficial plant community. See <br />attached Seed Mix for Permanent Revegetation. <br />Mechanical and Biological Control <br />1. Some weed species succumb to mechanical control, i.e. disking <br />and hoeing. When possible mechanical control will be the method <br />of choice. <br />2. Haying of the Mesa Gravel pit will be done to increase alfalfa <br />production and decrease Canada thistle invasion. <br />3. Annuals such as Pennycress will be disked prior to seeding with a <br />permanent and competitive grass mixture, see attachment for seed <br />mix. <br />4. Burning will be conducted where possible, with approval of <br />appropriate government agencies. <br />5. Hand pulling of individual plants will be done for small <br />infestations. <br />6. Stump cutting will be part of the control effort for Tamarisk. <br />7. Cattle and sheep will be used to stimulate production of <br />competitive grass and shrub species through grazing management. <br />8. Mowing before flower set will be used when possible. <br />9. Biological control will be used on some species if a method exists <br />that is proven to work effectively. The economics of biological <br />control will be considered when making the decision to use this <br />method. <br />l J <br /> <br />u <br />6 January 2005 <br />