Laserfiche WebLink
October 15, 2014 C- 1981 - 010 /Trapper Mine JLE <br />impoundments that receive run -off from these parcels were observed and are discussed in the Hydrologic Balance <br />section of this report. <br />Parcel A -C -05 is 7.01 acres in size. DRMS had previously evaluated this parcel for topsoil depth during an <br />inspection conducted on October 11, 2005. The Division found this parcel to have about 14 inches of topsoil <br />placed on it. It appears the dominant species established is Artemisia tridentata; Big Sagebrush. An understory <br />of grass and forbs has also established. The dominant perennial grass species established was likely Festuca <br />ovina; Sheep Fescue. A small area at the southern end of the parcel near the haul road had a fairly dense stand of <br />Bromus tectorum; Cheatgrass established. The forb species observed was Astragalus ccer, Cicer Milkvetch and <br />Achillea millefolium, Western Yarrow. This area blends in well with the surrounding vegetation and cattle were <br />actively grazing in the parcel during the inspection. Bare areas were not observed on this parcel. Overall, it <br />appears vegetation has established in this area to support the post mine land use. Rills and gullies were not <br />observed on this parcel. <br />Parcel A -B -10 is 83.5 acres in size. The Division evaluated the topsoil replacement depth on this parcel during the <br />August 15, 2013 inspection and the average topsoil depth observed was 11.75 inches. A very dense stand of <br />grasses and forbs have established and bare areas were not observed. The dominant perennial grasses observed <br />where Wheatgrasses (Agropyron spp.). Other perennial grass species observed where Poa pratensis; Kentucky <br />bluegrass, and Elymus cinereus, Basin Wildrye. The forb species observed were Western Yarrow, Cicer <br />Milkvetch, and Medicago sativa; Alfalfa. Chrysothamnus nauseosus, Rubber Rabbitbrush was observed <br />throughout the parcel. Carduus nutans; Musk Thistle or Cirsium vulgare; Bull Thistle was observed at several <br />locations in this parcel, but dense patches have not established. Trapper should continue to monitor this parcel for <br />noxious weeds and treat them as necessary. Overall, it appears vegetation has established in this area to support <br />the post mine land use. Several small rills were observed within this parcel, but they were not great in number and <br />have stabilized with vegetation cover. Erosion gullies were not observed. <br />Parcel A -B -09 is 9.2 acres in size. The Division had previously evaluated the topsoil replacement depth on this <br />parcel during the August 15, 2013 inspection. At that time, the Division measured one hole on this parcel and <br />found the replacement depth to be about 9 inches. This is one inch less than the minimum depth required. Given <br />this, two additional holes were dug using a hand shovel to evaluate topsoil replacement depth on this parcel. A <br />depth of 12 inches was observed and a depth of 16 inches was observed. It appears topsoil has been replaced at <br />the required depth for this parcel. The dominant perennial grass' observed on this parcel appeared to be Kentucky <br />Bluegrass, Basin Wildrye and Wheatgrass. The forbs observed were Western Yarrow, Cicer Milkvetch and <br />Alfalfa. Overall, it appears vegetation has established in this area to support the post mine land use. Bare areas <br />were not observed. Rills and gullies were not observed on this site. <br />The 2.6 acre portion of parcels Z -A -08 and the 2.1 acre portion of parcel Z -A -07 were observed. Parcel Z -A -07 is <br />comprised of a shrub clump (SC- 7 -07). The Z -A -08 parcel had a dense stand of grass established. The perennial <br />grass species observed was Basin Wildrye and Wheatgrasses. Western yarrow was observed throughout the <br />parcels. This portion of parcel Z -A -07 had several shrub species transplanted within it. Symphoricarpos <br />oreophilus; Mountain Snowberry and Amelanchier alnifolia, Saskatoon serviceberry were observed within the <br />shrub clump. A dense stand of Kentucky bluegrass was observed between the transplanted shrubs. Bare areas <br />Number of Partial Inspection this Fiscal Year: 3 <br />Number of Complete Inspections this Fiscal Year: 1 <br />Page 5 of 17 <br />