Reclamation Work Plan Lilly/Orphan Boy Mine Powell County, Montana
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FINAL Phase II - Reclamation Work Plan Lilly/Orphan Boy Mine Powell County, Montana Prepared for: Montana Department of Environmental Quality P.O. Box 200901 Helena, MT 59620-0901 Prepared By: TerraGraphics Environmental Engineering, Inc. 15 W 6th Avenue, Power Block 3rd Floor W Helena, MT 59601 406.441.5441 ph 406.441.5443 fx September 24, 2010 Lilly/Orphan Boy Reclamation Work Plan Table of Contents Section 1.0 INTRODUCTION ....................................................................................................... 1 1.1 Purpose of the Phase II Reclamation Work Plan.................................................................. 1 1.2 Organization of Phase II Reclamation Work Plan................................................................ 2 1.3 Project Team......................................................................................................................... 3 1.4 Project Schedule ................................................................................................................... 4 Section 2.0 ENVIRONMENTAL SETTING ................................................................................. 5 2.1 Setting and Climate............................................................................................................... 5 2.2 Geology and Soils................................................................................................................. 5 2.3 Hydrogeology ....................................................................................................................... 6 2.4 Hydrology ............................................................................................................................. 6 2.5 Vegetation and Wildlife........................................................................................................ 6 2.6 Land Use and Population...................................................................................................... 7 Section 3.0 DESCRIPTION OF THE PROPERTY ..................................................................... 10 3.1 Lilly/Orphan Boy Mine Site History .................................................................................. 10 3.2 Description of the Current Property.................................................................................... 11 3.2.1 Waste Characteristics................................................................................................... 11 3.2.2 Significant Historical and Cultural Features................................................................ 11 3.3 Ownership Information....................................................................................................... 12 Section 4.0 WORK PLAN COMPONENTS................................................................................ 13 4.1 Hydrogeology Investigation Plan ....................................................................................... 13 4.2 Mine Investigation Plan...................................................................................................... 14 4.2.1 Proposed Components ................................................................................................. 16 4.2.2 Surface Activities......................................................................................................... 20 4.2.2.1 Platforms in the Shaft............................................................................................ 20 4.2.2.2 Mine dewatering ................................................................................................... 21 4.2.2.3 Monitoring Wells and Piezometers....................................................................... 21 4.2.3 Underground Activities................................................................................................ 21 4.2.4 Project Sequence of Operations ................................................................................... 22 4.2.5 Roles and responsibilities: ........................................................................................... 24 4.3 Projected Reclamation Investigation Costs ........................................................................ 26 Section 5.0 REFERENCES CITED.............................................................................................. 28 1 Lilly/Orphan Boy Reclamation Work Plan List of Figures Figure 1. Site Location Map....................................................................................................... 8 Figure 2. Existing Topographic Site Map .................................................................................. 9 Figure 3. 1950 Mine Workings Map........................................................................................ 15 Figure 4. Site Layout Plan........................................................................................................ 18 Figure 5. Site Layout Plan with Land Application System...................................................... 19 List of Tables Table 1. Project Team ............................................................................................................... 3 Table 2. Project Schedule.......................................................................................................... 4 Table 3. Selected Phase II Reclamation Investigation Costs.................................................. 27 Appendices Appendix A SAP/QAPP ................................................................................................................ A Appendix B HASP..........................................................................................................................B Appendix C Crane Subcontractor Cost Estimates ..........................................................................C Appendix D Driller Subcontractor Cost Estimates........................................................................ D Appendix E Rain for Rent Cost Estimate .......................................................................................E Appendix F Mining Subcontractor Cost Estimate.......................................................................... F Appendix G Analytical Laboratory Cost Estimates....................................................................... G Appendix H Subcontractor Cost Estimates.................................................................................... H Appendix I Technical Memorandums .............................................................................................I II Lilly/Orphan Boy Reclamation Work Plan Acronyms and Abbreviations amsl above mean sea level ARD acid rock drainage DEQ Montana Department of Environmental Quality DOE US Department of Energy EEE/CA Expanded Engineering Evaluation and Cost Analysis EPA US Environmental Protection Agency GPS global positioning system HASP Health and Safety Plan lbs/cf pounds per cubic foot LOB Lilly/Orphan Boy MWCB Mine Waste Cleanup Bureau QAPP Quality Assurance Project Plan QC quality control RI Reclamation Investigation RWP Reclamation Investigation Work Plan SAP Sampling and Analysis Plan TerraGraphics TerraGraphics Environmental Engineering, Inc. Tetra Tech Tetra Tech EM, Inc. USGS United States Geological Survey III Reclamation Work Plan for Phase II RWP- Lilly/Orphan Boy Mine, Powell Co., MT Section 1.0 INTRODUCTION TerraGraphics Environmental Engineering, Inc. (TerraGraphics) received Task Order No. 12 from the Montana Department of Environmental Quality, Mine Waste Cleanup Bureau (DEQ/MWCB), under DEQ Contract No. 407041. Under Task Order 12, TerraGraphics prepared a memorandum, dated February 9, 2010 which reviewed the Lilly/Orphan Boy Reclamation Investigation (RI) Report by Tetra Tech EM, Inc, dated March 2009. The TerraGraphics memorandum identified data gaps in the Tetra Tech EM, Inc. RI and identified additional investigation necessary to support the preparation of the Expanded Engineering Evaluation and Cost Analysis (EEE/CA). Task Order 12 was subsequently modified (Modification C) to prepare a Phase II Reclamation Work Plan (Phase II RWP) to support additional field investigation and the preparation of a Phase II RI and ultimately the preparation of an EEE/CA for the Lilly/Orphan Boy Mine (PAD #39-006) located in Powell County, Montana. This Phase II RWP also includes the Hydrogeology Investigation Plan, prepared as a stand alone document, for the installation of wells and monitoring of groundwater and the Mine Investigation Plan for the analysis of the mine workings. A Sampling and Analysis Plan / Quality Assurance Control Plan (SAP/QAPP) and a Health and Safety Plan (HASP) have also been prepared as separate stand-alone documents. The SAP/QAPP addresses soil and water sampling that will occur and sampling protocols to be performed during the field investigation activities. A copy of the SAP/QAPP is included in Appendix A and a copy of the HASP is included in Appendix B. The Lilly/Orphan Boy Mine was a historical producer of lead, zinc, copper, silver, and gold. The Lilly/Orphan Boy Mine is located approximately 10.5 miles south of Elliston, Montana near the headwaters of Telegraph Creek (Figure 1). The Lilly/Orphan Boy Mine Site is an abandoned hard rock mine located within the Elliston Mining District listed on the DEQ/MWCB priorities sites. The mine is situated at an elevation of approximately 6,800 feet above mean sea level (amsl) and is composed of approximately 1½ acres of land contaminated by metal mining along Telegraph Creek. Characteristics