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DEPARTMENTOFNATURALRESOURCES <br />D Mode Pascoe Execm ne DrteU Or <br />June 10, 1983 <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SHELTON, Director <br />R ¢ba~0 D Lamm <br />G o~e~no~ <br />T0: Carol Russell <br />FROM: Sandy Emrich~~ ~~' <br />Z <br />RE: Twin Pines Ve9etat'ion <br />III IIIIIIIIIIIIIIII ~ <br />~~ <br />and Wildlife Adequacy Comments and Draft Findings <br />PJUTE: This is .a draft only. There are several adequacy concerns that need to <br />reviewed. <br />Vegetation infornlation is found on payes ti0-64 and revegetation information is <br />found on pages 88-90. <br />The vegetation within the surface disturbance area can be classified into two <br />types; previously mined land and pinyon-juniper woodland. The majority of the <br />.area is considered previously mined land and the vegetation is indicative of <br />disturbed lands. The dominant species in this type are kochia and Russian <br />thistle, both annual weeds. There are scattered plants of Rabbitbrush and an <br />occassional clump of Indian riceyrass. Vegetative cover is very sparse. <br />The pinyon-juniper woodland covers acres. It is located on the <br />south-facing slope above and adjacent to the old mine bench and on the valley <br />bottom where a sediment pond is proposed. This pinyon-juniper coin~nunity is <br />dominated by pinyon pine and one-seeded juniper. Stlrubs occurring in this <br />type are mountain mahogany, skunkbrush sumac and gainbel's oak. Blue yrama and <br />sideoats yrama are the predominant grasses. Other grasses are: red threeawn, <br />rough tridens grass, sand dropseed and Indian riceyrass. Veyetative cover in <br />this type is approximately thirty (30) percent, and herbaceous production from <br />the cornmunity is 84U pounds per acre. <br />Surface disturbances will be reclaimed to A <br />seed mixture of has been approved. <br />Since the area is considered previously mined land, the revegetation success <br />standards will be set in accordance with Rule 4.15.1 U. <br />There are no threatened and/or endanyered species that will be impacted as a <br />result of the proposed mine. <br />Findings cannot be completed until the following adequacy concerns are <br />addressed. <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />