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• , <br />BERMING AND LANDSCAPING PLAN FOR <br />THE MAMM CREEK SAND AND GRAVEL MINE <br />(7-12-01) <br />The proposed Mamm Creek Sand and Gravel Mine is located approximately two miles <br />east of the City of Rifle in Garfield County, Colorado. The southerly boundary of the <br />project site is adjacent to the northerly right-0f--way boundary of the Colorado <br />Department of Transportation, which in this area contains both a frontage road and <br />Interstate 70. The purpose of the Berming and Landscaping Plan described herein and <br />shown on the associated map is to provide a visual and noise buffer for the gravel pit <br />from the perspective of the I-70 comdor. This buffer will be constructed through a <br />combination of berming and vegetative cover, and is described in more detail below. <br />The mine project will be developed in four phases. The first phase will start on the east <br />end of the mining azea labeled on the site maps as the West Property Line to Horse Fence <br />Mine Area Phase four of the mining operation, the Dry Creek to Slough Mining Area, <br />will contain the majority of the mine facilities and equipment (such as asphalt plant, <br />concrete batch plant, office trailers, shop area, etc.) and thus will be the last area to be <br />mined. It will, however, be developed in conjunction with first phase of the mining in <br />order that the infrastructure facilities noted above can be put in place. Phase two of the <br />mining will occur in the Slough to East Property Line Mining Area, and Phase three will <br />occur in the West Ead Mining Area <br />The bemvng/landscaping for the site will be created in conjunction with the phasing plan <br />outlined above. That is, the phases that are currently in use are the phases that will <br />contain the berming/landscaping treatments. The initial focus of the berming/laadscaping <br />will thus be in the Dry Creek to Slough Mining Area where the main facilities will be <br />located. Typical Betm Detail A has been provided on the map to indicate a <br />representative cross section of the screening plan for this azea This section shows a <br />typica110,000 squaze foot area of the berm with the landscaping materials that will be <br />planted here. More mature vegetation will be planted in this section of the site since it <br />will be used from the beginning of the operation. A Recommended Plant List for Berm <br />A is also shown on the map indicating the planting materials recommended for use in this <br />area The berm will be constructed of a variable height and width in order to preserve <br />whatever existing vegetation may be located in the screening zone and to avoid conflicts <br />with the existing power lines located here. The top of the berm will have aradius-like <br />transition to the side slopes rather than a sharp edge, for a more natural appearance. <br />Viewed from above, the berm will undulate in response to the existing physical <br />conditions. Wherever possible, the bens will be greater than 6 feet in height to <br />**+aY+n+»~ the buffering effect. The overall height and width of the berm will depend, <br />though, on the amount of overburden/topsoil that is removed from the mining azeas. <br />The topsoil obtained from clearing the site will be placed in sepazate stockpiles from the <br />