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STATE OF COLORADO <br />DIVISION Of= MINERALS AND GEOLOGY c! <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />April 22, 2005 <br />Mr. Edward M. Gardner / <br />Whitewater Building Materials Corporation `' <br />P. 0. Box 1769 <br />Grand Junction, Colorado 81502 / <br />~/ <br />RE: Whitewater Pit 500, Permit No. M-1977-129, Technical Revision No <br />Dear Mr. Gardner: <br />Russell George <br />Executive Director <br />Ronald W. Cottony <br />- Division DirecTar <br />Natural Resource Trustee <br />3 Adequacy Review ~~ <br />DMG completed the preliminary adequacy review of your• applioatiorlPforeTechnical Revision No. 31TR-03) to. L: .' :• ~:,::' <br />. Permit No. NI-,1,977-129 for the Whitewater Pit 500.. The application,;aildressirig-weed management plans, . , <br />carinot,be approded.until the following issues are adequately.addressed>-~,Pteasa submit a response zo trie . •'s. r.~ .' , , <br />following issues as soon'as possible, but no later than Ap~il'26; 2005.so'the decision due date set for Aprih 27, . .' <br />' 2005' can be met If: your response, or a decision date extension `request,.are not. received by April. 26,.2005 <br />this application may be denied. - <br />ADEQUACY ISSUES <br />1. Please revise the Russian knapweed management plan io include a treatment during the bud to bloom <br />..stage to preventseed set and minimize noxious weed seed production from.the site. <br />AMG will review both reactive:and:proactive.measures takeri:tornanagenoxiousweeds whenrevafuating;a-site • ..... <br />for:compliancea+.Therefore; it~is strongly recommended that the:weed•rilahagement-plan-also include: =.,~~i: -: • ~: --~ <br />preventative•measuresto be implemented to minimize new: noxious weed=infestations. Examples include use~of -•~: ~~ <br />pipe to convey water in place of open ditches, maintaining positive drainage on affected surfaces to prevent <br />standing or slowly draining water, minimize the amount of disturbed acreage by stripping-.land just prior to. • <br />,., excavation and~conducting:reclamationras soon as feasible•afteran°areaismined.out,cmanage~wash:plant. , r:. .:;r .:~. <br />-- settling ponds to minimize exposed moist soils during and:immediately:after-:timesrof tamariskseed productien. _~: i r-s :. <br />Docuinentatiomof-weed management efforts is.critical to.ilemonstrate thaTall~reasonable measur."es are:' : • s .' : ~: ^'<< ' <br />implemented for noxious and problematic weeds. Therefore, DMG strongly,recommends¢hat~alb:weed: . <br />., management events be thoroughly documented and included•in-tfie"annual-report. -Documentation^should.: ~=c. r..= <br />,,, „include mapping of grandfathered reclamation; location and extent of weed patches, identification otapecies,-- _ •. .- <br />specification of management method used; timing of the treatment, and any specifics such as herbicide type;. <br />mixture strength, application equipment, temperature, weather, etc. The report should also include observed . <br />results of the effectiveness of the treatment and propose changes when treatments are proven ineffective. <br />If you need additional information, please contact me at the Division of Minerals and Geology, Grand Junction <br />Field Office, 101 South Third Street, Room 301, Grand Junction, Colorado 81501, telephone no. 970-243- <br />6368. <br />Sincer , <br />Steve S. Shuey <br />Environmental Protection Specialist <br />OLORADO <br />IV[5{ON QE <br />lIN &RALS <br />EOLOGY <br />C LANATION•NINING <br />SAFETY•ECIENCE <br />Bill Owens <br />Governor <br />Office of Office of Colorado <br />