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ESCO ASSOCIATES INC. <br />conditions, and because of the moisture-collecting design of the planting basins (Figure <br />E-2), sufficient moisture will be accessible to support these trees. <br />Page 6 - "Will the seeding rate be doubled for broadcast seeding? What acreage will be <br />broadcast seeded and hydromulched at The point of maximum disturbance during the life <br />of the mine?' .~ ` ~ <br />onse• As indicated in the seed mix tables (Tables E-2 through E-11), (~' <br />broadcast seeding rates will be 200 to 250% of the drill rates to compensate for the seed ~~,- <br />that will end up too deep or (mostly) too shallow in the soil as the result of the broadcast ~ <br />process. Based on the extent of disturbance in year 10 (year of maximum disturbance) <br />the areas steeper than 2(h): 1(v) that would be broadcast seeded and could be i <br />hydrom ed amount to a total of 7.5 acres. ~ \ <br />Page 7 - 'Please show areas of road cut, topsoil stockpiles, and fill that will require <br />establishment of a vegetational cover to stabilize them?' <br />Response: The map contained in Attachment 4 shows the locations and <br />approximat srrsa~oT-topsoil stockpiles. Total to soil stockpile acreage will be <br />a I r 27.7ae map contained in Attac ment 4 also s ows the footprints <br />of post reclam ures and indicates the areas along the main haul road that are <br />cuts or fills; in addition, as much as 3 acres of cut or fill may temporarily exist along <br />branches to the main haul road shown. <br />Questions not Related to Specific Paaes <br />"Is glyphosate-based herbicide toxic in any way?" <br />Response: Beyond their implicit effects on weed plants, glyphosate herbicides <br />have almost no soil persistence (Colorado Weed Control Handbook. ca. 1967. Extension <br />Service, Colorado State University, Ft. Collins). Roundup is a tradename for a widely <br />used glyphosate herbicide. <br />"How big are the units of reclaimed land that will be enclosed with an 8 foot fence that <br />will remain in place for 5 years after planting the area? Please show these on a map. <br />The Division is particularly interested in the amount of fencing required during the <br />point of maximum disturbance of the site during the mine life.' <br />Response: Eight foot fence will be used to enclose areas of woody plantings (See \ <br />Exhibit E). Post-mining vegetation types to be protected in this way include Dry 1 flr~ t~ <br />Shrubland, Moist Shrubland, Wooded Wetland, Cottonwood Groves, and Shallow Soi1~ ~,~~/ <br />Grassland with Pines. During year 10, the year of maximum disturbance, the amount of <br />C 8-foot fencing that would be required is approximately 22,360 lineal feet (see ~,~ <br />ac <br />'Figure E-1 -How many acres of compacted clay using a compactor will need to be <br />created from the Ridgetop areas developed for cottonwood groves?' <br />Response: These compacted clay areas total approximately 11 acres over the <br />entire area. <br />~- <br />~~y - <br />~\ ~ <br />