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III IIIIIIIIIIIII III <br />999 <br />February 17, 2000 <br />ENERGY, INC. Mr. Dan Mathews <br />~subsidieryot Division of Minerals and Geolo <br />Os:srot Generation 6 gY <br />hanunlplon 2]48 Broadway, #CS <br />Ceapenth° Grand Junction, CO 81503 <br />3607 COUnry Ad. 65 <br />a~._........ <br />t <br />FEB 2 2 2000 .., <br />,,. <br />Han6ery,co et616 ~; MINOR REVISION REQUEST (MR118) -Limited Maintenance <br />Reseeding of select area on Refuse Area #1. <br />Dear Dan: <br />As previously discussed, several problems exist with the revegetation of Refuse Area #1. First, <br />Cheatgrass has again become a dominant invader on portions of the site. Second, in areas with <br />substantial perennial vegetation the plant community is composed of an overwhelming <br />dominance of grasses. The following plan is designed to help address both issues. <br />During the late winter /early spring of 2000, once the ground is thawed and active growth of <br />cheatgrass is observed, approximately two acres of Refuse Area #1 will be sprayed to control <br />Cheatgrass on select areas dominated by this species. In no case will the treatment cover more <br />than 2.8 acres (20%) of the 14.07 acres of this site. The herbicides that will be used are Roundup <br />Pro and Oust. Each will be applied separately. Roundup Pro will be the herbicide primarily <br />used. Oust will be used on an experimental basis since only limited information is available <br />concerning its effects on seedling establishment. <br />Roundup Pro will be applied at a rate of one pint per acre in a manner consistent with its <br />labeling. This low rate is intended to control cheatgrass while minimizing the effects on <br />perennial vegetation. <br />Oust will be applied at a rate of 0.5 to 0.75 ounces per acre. Use of Oust will be limited to a <br />maximum of 0.5 acres for the purpose of this treatment. The primary concern with use of Oust is <br />its potential adverse effects on the reseeding soon afrer treatment. The label and Dupont <br />literature recommend waiting 90 to 160 days following treatment before planting grasses <br />depending on species. No such recommendations exist for forb and shrub plantings. The azeas <br />treated with Oust will be considered experimental in nature with subsequent fall reseeding if <br />adequate seedlings do not survive. <br />Approximately one week following herbicide application the treated areas will be broadcast <br />seeded and harrowed. The proposed seed mix will be strongly dominated by forbs and shrubs. <br />Table V.13a shows the proposed seed mix. Larger seeded species will be seeded prior to <br />harrowing to allow deeper soil coverage than the smaller seeded species that will be seeded <br />following harrowing. In the event that seedlings do not become adequately established on the <br />Oust treated portions a fall seeding will also occur. <br />