INSPEC03114 - Laserfiche WebLink

Home Browse Search

RPR-28-2005 13 48 Lafarge Metro Land NORTH DELTA PIT WEED CONTROL PLAN Introduction 303 657 4037 This document addresses issues related to weed control at the North Delta aggregate mining site operated by Lafazge West, Tnc. Weed control is an issue associated with lands in all stages of the mining process including lands occurring within the permit area that will not be mined, lands that have not yet been mined, disturbed areas that are not yet reclaimed or are part of the operations site, and lands that have been reclaimed. Each of these areas poses different situations relative to weed control. The areas that will not be mined contain primarily perennial weed species that became established on the site doting the years when agricultural was the main land use. The primary approach for controlling these weeds will be application of herbicides, Areas within the permit area that have not yet bete mined contain weed species comparable to areas that will not be mined, however, welds in these aeeas will be best controlled by mowing lather than by herbicide application. Disturbed aeeas that have not yet been permanently reclaimed such as roadsides, operations areas, product stockpiles and topsoil stockpiles may support a variety of weed species. Comrol of weeds on these sites will be accomplished using a variety of techniques including mowing, application of herbicides, temporary seeding and timely turnover of products, Reclaimed areas may also support a variety of weed species. Weeds on these areas will be controlled with mowing, application of herbicides, burning, if feasible or combinations of the above treatments. Descriptions of these weed control approaches are described in more detail in a following section. Weed Species of Concern Typically, the ward species of concern include some or all the following annual and perennial species: Sdentitic Name Common Name Distrtbuiional Status Growth Form Cirsium arvense Canada Thistle Introduced Perennial Fotb Cnrdaria d~aba White Top Introduced Perennial Fort Lepidium latifolium Perennial Peppe s Introduced Perennial Forb Convolvuius asvensis Field Bindweed Introduced Perennial Forb Centaurea diffusa Diffuse Knapweed Introduced Annual Forb Carduus nutans Nodding Bristle Thistle Introduced Biennial Forb Sisymbrium altissimum Tumbling Hedge Mustard Introduced Annual Forb Deseurainia spp. Tansy Mustards Introduced Annual Forb T~erbascum rho sus Common Mullein Introduced Biennial Forb Tanwris ramosissima Tamarisk introduced Deciduous Shrub ~7aea us an sti olio Russian Olive Introduces Deciduous Tree A]] of these species are adapted to disturbed condilioas such as those that occur on mining sites or agricultural leads. All of these species were introduced into the region at various times beginning In the late 1800's and have expanded into a variety of habitats, At the North belts Pit, the primary species of concern is diffuse knapweed and Tamarisk. P.02 R~ 0 ., . ",,., ~~ ~I i... ., ,' ` ,,, `':~ ~ l~ nt 'ry ~~{ ~G ~'\ .