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VEGETA710N INFORMATION <br />UNITED STATES <br />DEPARTMENT OF <br />AGRICULTURE <br />Natural <br />Resources <br />Conservation <br />Service <br />1607 Pheasant Ridge <br />Sterling, CO 80751 <br />(303) 522-7554 <br />March 20, 1996 <br />Stevan L. O'Brian <br />vice President <br />Environment, inc. <br />7985 Vance Drives <br />Suite 205A <br />Arvada, CO 80003 <br />Dear Mr. O'Brian, <br />RE: Soil and Vegetation Study <br />for proposed gravel pit expansion. <br />We completed a field investigation of the gravel pit <br />expansion site on March 11, 1996. The following information <br />describes the vegetation community that was present and the <br />current estimated production. it then gives recommendations <br />on Fertilization, seeding the grass, and the species <br />recommended for reclaiming the site. <br />vegetation: The plant community on this site is <br />approximately 90-95$ grasses; 2-5$ forbs, and 2-5$ shrubs. <br />The species of plants currently found on the site include <br />blue grams, prairie sandreed, switchgrass, sixweeks fescue, <br />wormwood, broom snakeweed, sand sagebrush, yucca and prickly <br />pear cactus. These species are consistent over the entire <br />site. Total production is estimated at 400 - 500 pounds per <br />acre. Carrying capacity would be 4.8 - 6.0 acres per animal <br />unit month (Based on 1200 pounds of forage (air-dry) per <br />animal unit month. This figure takes into account the <br />vegetation that is lost through trampling or that is <br />unpalatable to animals.) <br />Fertiliser: Manure can be spread on the prepared surface at <br />the rate of 30 tons per acre; or nitrogen (N) and phosphorus <br />(P205) fertilizer can be applied and incorporated at a rate <br />of 40 pounds per acre each. Time of application should be <br />immediately prior to seeding. If nitrogen and phosphorus <br />are applied, a native hay or straw mulch will have to be <br />spread and crimped into the soil at a rate of 4000 pounds <br />per acre after fertilizing. Mulch should stick 6^ out of <br />the soil. These measures will help control wind and water <br />erosion until the grass becomes established. <br />