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damaging new seedlings. Herbicides will be applied by a licensed commercial applicator. Stockpiles that <br /> remain undisturbed for more than one season will be seeded with a temporary cover crop. Where noxious <br /> weed control measures cause disturbance to the remaining vegetation,seeding or planting of desirable <br /> replacement vegetation will occur during the first normal planting or seeding season after weed control <br /> measures have been implemented and deemed successful. <br /> • Contact Person(s) <br /> During mining,the Operations Manager at the site will be the contact person for weed control. When mining <br /> is completed,the weed control contact person will be Aggregate Industries'operations staff at the corporate <br /> office in Golden, Colorado. Aggregate Industries will be responsible for weed control until the site is <br /> released by DRMS. At that time, responsibility for weed control will transfer to the land owner. <br /> The grass seed mix,composed of a long lasting and regenerating native upland seed mixture,will be used in upland <br /> areas where no future irrigated agriculture or other development is anticipated. The native open space seed mix <br /> recommendation is presented below. <br /> Application <br /> Upland Meadow Grass Seed Scientific Name Variety %of Mix Rate* <br /> #PLS/acre <br /> Big Bluestem Andro 0 on gerardii Kaw 15% 1.7 <br /> Blue Grama Bouteloua gracilis Hachita, Lovin ton 10% 0.3 <br /> Green Needle grass Nassella viridula Lodom 15% 1.5 <br /> Sideoats Grama Bouteloua curb endula Vau hn, Butte 10% 1.0 <br /> Switch rass Panicium vir atum Blackwell 20% 2.0 <br /> Western Wheat grass Pasco rum smithii Arriba, Barton 30% 4.8 <br /> Total 11.3 <br /> *Application rate is for drill seeding. If seed is to be broadcast,the ap lication rate will be doubled. <br /> Temporary Stockpile Vegetation: <br /> Luna Pubescent Wheatgrass—15 Ib./ac <br /> Amur Intermediate Wheat rass—15 Ib./ac <br /> Upland grass seed will be planted with a drill equipped with depth bands and press wheels. The seeded area will <br /> then be covered with certified weed-less straw mulch at a rate of 2,000 pounds per acre. The straw will be crimped <br /> into the soil to control erosion until the grass becomes established. Drill seeding is the preferred method for <br /> revegetation. If broadcast seeding is necessary on moist soils,steep slopes, or in excessively rocky areas, success <br /> can be encouraged by broadcasting onto growth medium that is very loose. If the seed is broadcast in those <br /> circumstances,then the seeded area will be dragged to help bury the seed. <br /> Wildlife <br /> Current wildlife conditions and potential impacts are described in Exhibit H,Wildlife Information. <br /> Water—General Requirement <br /> To minimize the effect on the prevailing hydrologic balance,the operator shall: <br /> a. Comply with all applicable Colorado water laws. <br /> b. Comply with all applicable Federal and State water quality laws and regulations. <br /> c. Comply with all Federal and State requirements for dredge and fill. <br /> d. Perform all work to minimize erosion and sediment transport. <br /> Aggregate Industries Tucson South Resource <br /> Permit#M-2004-044112 Permit Amendment <br /> Page E-7 <br />