Laserfiche WebLink
September 27, 2010 C-1981-015/Fruita No 1 & 2 DTM <br />FISH and WILDLIFE - Rule 4.18: <br />The site is used during winter months by mule deer and to a lesser extent by elk, on occasion. Due to season, no <br />evidence of recent use of the site by deer or elk was present. A large covey of 25 or more chukars was flushed <br />from the shrub cover on the flat top of the #1 Mine bench. <br />HYDROLOGIC BALANCE -Rule 4.05 <br />?Drainage Control 4.05.1, 4.05.2, 4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7, <br />4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring <br />4.05.13; Drainage - Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />The mine site was dry at the time of inspection. The sediment pond was dry. The 2009 IMP project sealed the <br />non-functional primary spillway, and lowered the elevation of the riprapped emergency spillway, such that the <br />pond has very minimal remaining retention capacity. The embankment and spillway structure appeared to be <br />stable, with no problems evident. Permanent drainage channels on site, several of which were repaired as part of <br />the 2009 IMP project, have held up well with no problems evident. <br />ROADS - Rule 4.03 <br />71 Construction 4.03.1(3)/4.03.2(3) <br />Drainage 4.03.1(4)/4.03.2(4) <br />- Surfacing and Maintenance4.03.1(5) and (6)/4.03.2(5) and (6) <br />-Reclamation 4.03.1(7)/4.03.2(7): <br />There was evidence of recent flow down the channel along the inside portion of the lower segment of the <br />reclaimed Mine #1 access road. The small rock checks along the low gradient segment and riprap along the steep <br />lower segment into the natural drainage held up well. Small rock checks placed along the lower road segment <br />appear to have functioned effectively; slowing runoff, trapping sediment, and minimizing erosion. <br />RECLAMATION SUCCESS - Rule 4.15, Rule 3: <br />Portions of the mine site were originally revegetated in the 1990's, and a significant acreage at the site was <br />reseeded in association with a DRMS bond forfeiture reclamation project in 2000, following extensive flood <br />damage in 1998. A relatively minor acreage was seeded in association with DRMS remedial projects in 2009, <br />including the small (+/-'/2 acre) portion of the Mine #2 portal backfill, where established vegetation was limited to <br />scattered shrubs, with poor understory. As described in previous reports, there is good establishment of seeded <br />shrubs in most reclaimed areas, and good establishment of both seeded grasses and shrubs along the reclaimed <br />access road to the upper bench. Vegetative cover on reclaimed slopes appears to be effective in minimizing <br />erosion associated with rainfall at the site. Erosion that has been observed in recent years is almost entirely due to <br />concentrated runoff from areas upstream of the mine site. Repair and minimization of channel erosion from <br />concentrated upland flow has been the focus of remedial measures in 2009; along with closure of a small opening <br />in the Mine #1 portal backfill, sealing of a non-functional culvert spillway at the sediment pond and improvement <br />of the open channel spillway. The work undertaken in 2009 utilized all remaining reclamation funds, and appears <br />to have adequately addressed the various watershed and safety concerns that had been identified. <br />Number of Partial Inspection this Fiscal Year: 0 <br />Number of Complete Inspections this Fiscal Year: 1 <br />Page 3 of 7