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North Thompson Creek Mine Phase III Bond Release, ne.3 <br />There is a valve in the manhole allowing the discharge to be routed downhill to the Long <br />Pond, or to be diverted south under the adjacent roadway and then discharged downslope <br />into N. Thompson Creek. During the inspection this discharge was being diverted under <br />the roadway and downslope into N. Thompson Creek. Mr. Muhr reported this discharge <br />was diverted under the road during the fall of 2006. There was orange iron staining on the <br />downslope soil and litter on both sides of the discharge pipe, flowing downslope toward <br />N. Thompson Creek. Based on DRMS observations downslope, Mr. Kaldenbach's <br />inspection report indicates that little if any of the discharge is reaching N. Thompson <br />Creek. It appears the discharge is being absorbed by the soil and litter on the downslope. <br />During the April 17`" inspection Mr. Walker noted that the streamside rocks at this <br />location were not stained orange. <br />Mr. Kaldenbach sampled the Mine No. 3 discharge for field parameters. The pH <br />measured was 6.8, and total Fe was 7 milligrams per liter. Mr. Kaldenbach has provided <br />additional field parameter measurements in his inspection report. <br />We did not have adequate sample bottles to collect a discharge sample for lab analysis, so <br />Mr. Kaldenbach returned to the site on April 18 and collected a laboratory sample. Lab <br />analysis had not been received when I spoke to Mr. Kaldenbach yesterday, Apri130`". <br />Mr. Kaldenbach's inspection report documents his inspection activities on April 18'"; I <br />did not attend the April 18t" inspection. The Mine No. 3 discharge has been diverted back <br />to the Long Pond effective April 18`" approximately one hour after the DBMS Mine No. 3 <br />dischazge sample was taken according to the DBMS inspection report. Mr. Kaldenbach's <br />report also states that page 4-121 of the approved mining permit (C-81-025) indicates: <br />"Water from the No. 1 Mine and the No. 3 Mine continue to be treated by the passive <br />water treatment system". <br />Both flume locations in N. Thompson Creek have been successfully reclaimed and the <br />permittee did a very good /natural job in the reclamation grading and rock placement. <br />As mentioned above, we did not inspect the reclaimed flumes on Middle Thompson <br />Creek, but I have inspected these flumes previously with no problems noted. <br />Our last stop during the inspection was to observe the backfill settlement at the Mine No. <br />3 portal. Mr. Muhr reported that he attempted to repair a sinkhole at this same location <br />last fall, and it has subsided again. This area will have to be backfilled and seeded again. <br />This concluded the field inspection on April 17, 2007. <br />Based on the above, DRMS will determine whether the option of diverting the Mine No. <br />3 discharge under the roadway and discharging downslope into N. Thompson Creek as <br />observed on April 17 was in compliance with the description of mine water treatment as <br />approved in the mine permit at page 4-121 and as described above. <br />