Now showing items 1-13 of 13

    • Ajax/Magnolia project 

      Umatilla National Forest (Agency : U.S.); North Fork John Day Ranger District (Or.); EA Engineering, Science, and Technology, Inc.; Millennium Science and Engineering, Inc. (2002-12)
      Contains several documents, including abbreviated preliminary assessments of each of the Ajax and Magnolia mines, a site inspection of the two mines, a public participation plan, and an engineering evaluation/cost analysis ...
    • Tillicum abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2003-02)
      Assesses mine site consisting of waste piles placed on moderate to steep side slopes. A Niton XRF unit found arsenic and lead exceeded EPA Region goals. Based on its proximity to Granite Creek, a Site Inspection is recommended.
    • Monumental abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2003-02)
      Assesses mine and mill site, consisting of waste and tailings piles on flat to moderate side slopes and mill on steep slopes, with an opening in the ground surrounded by an unstable area. A Niton XRF unit found arsenic, ...
    • Granite Creek Mines site inspection 

      Wallowa-Whitman National Forest (Agency : U.S.); EA Engineering, Science, and Technology, Inc. (2004-01)
      Documents Site Inspection performed by EA Engineering at five Granite Creek Mines: Monumental, Cap Martin, Sheridan, Tillicum, and Central. The objectives were to access the immediate or potential threat posed by wastes ...
    • Ruth #1 Mine abbreviated preliminary assessment 

      Willamette National Forest (Agency : U.S.) (2004-10)
      After performing a preliminary assessment using a Niton XRF unit on waste rock dumps at the Ruth Mine, 8 miles northeast of Elkhorn, a site inspection was recommended because of the concentration of various elements, the ...
    • Ruth Mine initiation of CERCLA investigation memorandum 

      Willamette National Forest (Agency : U.S.); United States. Forest Service. Pacific Northwest Region (2005-02-23)
      Documents decision to initiate a CERCLA (Comprehensive Environmental Response Compensation and Liability Act) process after an abbreviated preliminary assessment found release of hazardous elements within the Ruth Mine #1 ...
    • Granite Creek Mine #5 abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2006-08)
      Assesses mine site consisting of a large collapsed adit and approximately 500cy of wasterock material adjacent to Granite Creek, with numerous trenches and apparent hydraulic mining. A Niton XLt unit found that most metals ...
    • Granite Creek Mine #6 abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2006-08)
      Assesses mine site consisting of a large collapsed adit and approximately 1000cy of wasterock material, which is adjacent to a small ephemeral tributary to Granite Creek. A Niton XLt unit found that most metals at the site ...
    • Granite Creek Mine #7 abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2006-08)
      Assesses mine site consisting of a large collapsed adit and approximately 700cy of wasterock material adjacent to Granite Creek, with numerous trenches stemming from hydraulic mining and possible historic dredging operations. ...
    • New York Mine abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2006-08)
      Assesses mine site consisting of numerous trenches on the mountain slope, at least five of which are collapsed to partially collapsed adits, 9000-12,000cy of wasterock and 4000cy of tailings. A Niton XLt unit found all ...
    • Upper Central Mine abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2006-08)
      Assesses mine site on moderately steep side slopes consisting of four collapsed adits and about 1500cy of wasterock. A Niton XLt unit found most metals detected at the site exceeded screening criteria for birds, invertebrates, ...
    • Granite Creek Tributary Mines initiation of CERCLA investigation memorandum 

      Wallowa-Whitman National Forest (Agency : U.S.) (2007-02-20)
      Documents, pursuant to the Guidelines of the National Oil and Hazardous Substance Contingency Plan (NCP), the decision to initiate a CERCLA investigation in nine locations at the Granite Creek Tributary Mines site. A Site ...
    • Buffalo Mine abbreviated preliminary assessment 

      Wallowa-Whitman National Forest (Agency : U.S.) (2008-08)
      Assesses mine site on moderately steep side slopes, consisting of two adits, associated wasterock and tailing ponds, one with water treatment facilities and miscellaneous buildings. A Niton XLt unit found that all metals ...