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We tentatively decided on a possible location for a well about 150 yards upstream from the ideal <br />spot. (I say "tentatively" because right now its just my opinion and may be discussed further <br />here in the Division.) This location provides several necessazy characteristics. (1) it is down- <br />gradient ofthe portal and nearly all of the new facilities in the canyon: (2) it can be located now <br />and not moved or disturbed during construction; (3) it can be located near the existing <br />streambed, not on a "shoulder" of the canyon bottom, thus improving the chances that the well <br />will be near the topographic low point in the cross-section of the Elk Creek alluvium. <br />A diagrammatic sketch of the area is attached to show the location of the features discussed. <br />It appears [hat a previous hang-up was Tom Anderson's belief that a well in previously disturbed <br />ground would be meaningless. 1 explained that what we need is a record of what happens to the <br />water from the time before construction of the new facilities through operation and up to bond <br />release time. "Disturbed" isn't relevant. If there is groundwater flowing in the alluvium, we <br />need to see how its quantity and quality aze affected by the new facilities. It's doesn't matter <br />whether that groundwater is flowing through "distrubed" alluvium fill or undisturbed. <br />The placement of this well for TR-32 side-steps any issues concerning the alluvium at the mouth <br />of Elk Creek. You can see on the diagram that Elk Creek opens up into a broad flat area now <br />occupied by the Sanborn Creek mine facilities and the town of Somerset. There has been <br />disturbance & activity here for a hundred years. My deduction would be that the groundwater in <br />all the azea underlying that mine/town site -except that direction outside the "mouth" of Elk <br />Creek Canyon - is dominated by the groundwater regime of the North Fork alluvium. It will be <br />very difficult, if not impossible, to separate any effects of Elk Creek groundwater on that <br />dominant system down-gradient of the mouth of the canyon. <br />Another issue that I discussed, although without response from the Oxbow staff, was that it <br />would be very beneficial to both parties if Oxbow would map the alluvium - at least at the site of <br />the well - to provide a cross section of the alluvium-bedrock interface. That would help insure <br />that the well is sited for maximum effectiveness and would also allow Oxbow to calculate <br />groundwater volumes in the alluvium. They might find that useful in the future if a case needs to <br />be made that there is little or no impact. <br />