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Dowe Flats Quarry Noxious Weed Management Plan <br />6 Monitoring <br />Effective weed management strategies often require several seasons to eradicate or control weed <br />populations to an acceptable level. With well-established infestations it is likely that a seed bank <br />has developed in the soil that is capable of producing new plants for many years. Weeds can also <br />easily re -invade treated areas from adjacent populations in one growing season if control and <br />treatment activities are prematurely curtailed. Weed management efforts should be carried out <br />over an adequate number of growing seasons to realize effective weed management within the <br />target area. <br />As with all weed management, this multi -season effort is best served by effective documentation <br />of control efforts and continued vigilance in successive seasons of management. Information can <br />be used to modify treatment priorities and weed management strategies over time. Vigilance is <br />required against new infestations that may be moving into the site. These new sources of <br />infestation may be worked into prevention and management plans as necessary. This weed <br />management plan will be modified over time as site conditions change. Weed management <br />strategies and priorities can be modified as weed infestations change in response to continued <br />control efforts. <br />7 References <br />Beck, K.G., S.K. McDonald, S.J. Nissen, and P.H. Westra. 1998. 1998 Colorado Boulder <br />Country Noxious Weed Management Plan last amended effective July 20, 2004. <br />(https://www.bouldercounty.org/doc/parks/weedmplan.pdf) [accessed January 2013]. <br />Colorado Department of Agriculture, Conservation Services Division Noxious Weed Program <br />Website. <br />(http://www.colorado.gov/cs/Satellite/ag_Conservation/CBON/ 1251618780047) <br />[accessed January 2013] <br />Colorado Division of Reclamation, Mining and Safety. 2006. Mineral Rules and Regulations of <br />the Colorado Mined Land Reclamation Board for the Extraction of Construction <br />Materials. Promulgated October 1995, Amended August 2006. <br />http://mining.state.co.us/SiteCollectionDocuments/Revised- <br />ConstrMatadoptedAug92006indexed.pdf [accessed August 2015]. <br />Colorado Revised Statutes Title 35, Article 5.5- Colorado Noxious Weed Act and rules <br />pertaining to the Administration and Enforcement of the Colorado Noxious Weed Act. <br />Colorado State University Cooperative Extension, Weed Management Guide for Field and <br />Vegetable Crops. Publication #XCM-205, Fort Collins, CO. <br />Colorado Weed Management Association, Noxious Weeds if Colorado, 10t" Edition. 2009. <br />Bussan, A.J., T.D. Whitson, S.A. Dewey, and M.A. Trainor. 2001. Weed Management <br />Handbook: 2001-2002. Cooperative Extension Services of Montana, Utah, and Wyoming <br />Thornton, Bruce J., H.D. Harrington, and R.L. Zimdahl. 1974. Weeds of Colorado. Colorado <br />State University Experiment Station, Bulletin 514-S. Fort Collins, CO. <br />Whitson, Tom D., ed. Weeds of the West. 9th Edition. 2001. The Western Society of Weed <br />Science, Western United States Land Grant Universities Cooperative Extension Services, <br />Newark, CA. <br />Habitat Management, Inc. 10 September 2015 <br />