Laserfiche WebLink
September 1, 2015 C-1996-084/Lorencito Canyon Mine JHB <br />recent gully formation on the face or ditch undercutting on the perimeter ditches or fill benches. (Photo) <br />FISH and WILDLIFE — Rule 4.18: <br />Nine wild turkeys were observed feeding in the grassland reference area. A mule deer buck was observed <br />on the undisturbed part of the knob at the mine site. (Photo) There was evidence of elk scat throughout the <br />reclaimed area. <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, 4.05.10; <br />Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; <br />Drainage — Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />Ditches and culverts throughout the mine site had held up to the recent large rain event. It did not appear <br />that ditches had breached. Ponds appeared to be holding pools of water and not discharging. <br />Pond 8 appeared murky but below discharge elevation, Water held in Pond 9A was murky but not discharging. <br />Most ditches had held up well. Some ditches had large deposition of sediment. LCC will need to evaluate the <br />ditches to assure that the ditches can continue to pass the designed flow. <br />Locations that may need clean out of sediment include: Ditch D9 at intersection with D12. Ditch D3 at Culvert C3 <br />inlet. There has also been some downcutting of the rock armoring in Ditch D3. <br />Ditch D 11 has downcut through the recent repairs. There is a pile of rock at Culvert C-4 that might be useful for <br />rock check dams or armoring. There is considerable sediment deposition in DI I at the rock check dams at the C-4 <br />outlet (photo). There is a large sediment deposition at the inlet to Culvert C4. LCC needs to assure that designed <br />flow will not spill over onto roadway. <br />D 18 appears to be functioning well. (photo) <br />The ditch on the north side of the permanent access road between Fill 7 and Fill 9 has a large fan of sediment. The <br />slope on the north side of the road continues to erode and has bare patches. (photo) <br />Culvert were clear with no sediment impeding flow through any of the inspected culverts. <br />RECLAMATION SUCCESS - Rule 4.15, Rule 3: <br />The Division and Arcadis held a phone conference on August 25, 2015 regarding sampling methodology <br />and protocol prior to the sampling efforts on 9/1. The proposed sampling methods are in compliance with the <br />approved permit. One exception was suggested by the Division. The approved sampling methodology calls for 50 <br />M long transects. The reference area consists of a long narrow valley of the Lorencito canyon. The Division <br />suggested that 25 M transects be used to reduce the potential for overlapping transects within the narrow grassland <br />reference area. The consultant concurred that this modification may be beneficial for the purpose of reducing <br />sample overlap. <br />Number of Partial Inspection this Fiscal Year: 3 <br />Number of Complete Inspections this Fiscal Year: 0 <br />Page 3 of 12 <br />